Diagnostics and testing of communication network (Discovery 3)

Inspection and verification

1. Ensure that the customer's complaint is justified.

2. Visually inspect for obvious defects.

Some networks have a wired connection.; a multimeter and electrical manuals can be used to diagnose them by identifying the general area of the problem using a diagnostic trouble code (DTC).

The Media Overhead System (MOST) network transmits data from the infotainment system via fiber optic cables, and requires diagnostic and repair techniques that are familiar to many of us. Refer to the MOST diagnostics section after the DTC index.

General information

Fuses and fuses Wiring harnesses and electrical connectors Wiring and condition of fiber optic wiring harness Correct connection of optical connectors Control modules Sensors

3. If an obvious cause for the problem you identified or the customer described is found, resolve it before moving on to further action. (if possible).

4. Use an approved diagnostic system or scan tool to retrieve all diagnostic trouble codes (DTCs) before accessing the DTC Index.

Since the networks cover the entire vehicle, it is recommended to perform a full DTC reading.

Clear all DTCs after troubleshooting.

DTC Index

NOTE: Generic scan tools cannot read the codes listed or can only read 5-digit codes. Match the 5 digits from the scan tool with the first 5 digits of the listed 7-digit code to identify the fault. (the last 2 digits provide additional information readable by a manufacturer approved diagnostic system).

Lost connection codes

Lost communication codes indicate that the module is not receiving CAN information from another module, but its own data transmission is normal.

These codes typically indicate an open in the electrical circuit.

If a communication loss code is registered, check the customer complaint and check whether the warning lights came on or whether there were any fault signals from other vehicle systems. (seemingly unrelated to the module for which the code is registered), perform a full code reading.

Analyze the logged codes to identify possible common trends, such as a number of modules reporting loss of communication with one particular module.

NOTE: Do not interpret timeout codes as module or circuit failure. These codes are sometimes logged when the networks are busy and a module is unable to process its signal on the network within the allotted time.

Check the suspect module's power and ground circuits and the CAN circuits between modules and make any necessary repairs. Refer to the electrical manuals for additional information.

Check, repair and clear all registered codes, recheck for proper operation.

Bus Disable Codes

The bus and its status information refers to the corresponding network and the modules of this network.

If the code indicates that the bus is disabled, this means that the corresponding module has detected errors, deactivated CAN data transmission and disconnected itself from the network to ensure the functioning of the rest of the network. At this point, the code bus disabled is registered.



The most common reason for the registration of the codes "bus disconnected" is a short circuit in the CAN network.; before suspecting a module fault, check the CAN circuits using electrical manuals.

Software version NNV502520 has the ability to register a failure in any of the communication lines listed below if the battery voltage drops suddenly and significantly while the output circuit is operating. The resulting DTCs only require resolution if there is a registered failure in the associated system. Software versions beginning with NNV502990 correct this issue.

Communication lines:

• CAN bus is off
• LIN SCgnd
• LIN Bus Header Error
• LIN bus checksum error
• SLIN SCgnd
• SLIN Bus Header Error
• SLIN Bus Checksum Error

DTC	Description	Possible reason	Action
B118662	Luggage compartment lid locking device signal comparison error	Electrical circuit of the locking device: short circuit or open circuit Malfunction of the locking device unit Internal CJB failure	Refer to the electrical manual and check the locking device circuit. Check the operation of the locking device unit. If the fault persists, there may be an internal fault in the CJB. If there are no other DTCs, ignore this fault.
B11C312	Relay for opening the locking device	Electrical circuit of the relay for opening the locking device: short circuit to + battery, overheating or overload	Refer to electrical manuals and check the circuit. Repair if necessary.
B1A0016	Control module	Control module: voltage in circuit below threshold Voltage less than (main control module voltage - 2 V) for more than 10 sec.	Check the electrical power and ground circuits of the corresponding module.
B1A9074	Hatch movement too slow	Slippage of the sunroof drive (mechanical problem)	Check/replace sunroof drive if necessary.
B1A9131	Speed/Position Sensor A	Sunroof Sensor Wiring: Open or Short Circuit Hatch position sensor failure	According to the electrical manual, check the circuit between the sunroof control module and the sunroof motor for an open or short circuit. Replace the sunroof motor/motor if necessary.
B1A9231	Speed/Position Sensor B	Sunroof Sensor Wiring: Open or Short Circuit Hatch position sensor failure	According to the electrical manual, check the circuit between the sunroof control module and the sunroof motor for an open or short circuit. Replace the sunroof motor/motor if necessary.
B1A9393	The hatch position is not in accordance with the norm	Hatch position outside expected range Sunroof Sensor Wiring: Open or Short Circuit Hatch position sensor failure	Clear DTC and test sunroof operation. Refer to the electrical manual and check the circuit between the sunroof control module and the sunroof motor for an open or short. Replace sunroof motor/motor as needed.
B1A9801	LIN bus - electrical circuit No.1	LIN bus: short circuit to battery + or ground	The LIN bus provides serial communication with the rain sensor, sunroof, optional seat memory modules, and DTC logging control is provided by the Vehicle Configuration File (CCF) (depending on the installation). Repair is only required when one or more devices are not installed and are not working properly. See the "Lost Connection" condition description at the beginning of this table.
B1A9881	LIN bus - electrical circuit No.1	Software error Power failure when transmitting rain/light sensor signal	No repairs are required unless there is a customer complaint about poor performance of the rain sensor, sunroof, or seat memory. The LIN bus provides serial communication with the optional rain sensor, sunroof, and seat memory modules, and DTC logging is controlled by the vehicle configuration file (CCF) (depending on the installation). Repair is only required when one or more devices are not installed and are not working properly. See the "Lost Connection" condition description at the beginning of this table.
B1A9883	LIN bus - electrical circuit No.1	LIN bus checksum error	The LIN bus provides serial communication with the rain sensor, sunroof, optional seat memory modules, and DTC logging control is provided by the Vehicle Configuration File (CCF) (depending on the installation). Repair is only required when one or more devices are not installed and are not working properly. See the "Lost Connection" condition description at the beginning of this table.
B1A994C	Power on reset	Reconnecting power to the Central Junction Box (CJB) or connecting the battery	No action required, clear/ignore DTC.
B1B0042	Secondary module "A"	Software Error - General Memory Failure	No action required, clear/ignore DTC.
B1B0044	Secondary module "A"	Software Error - Data Memory Malfunction	No action required, clear/ignore DTC.
B1B0045	Secondary module "A"	Software error - program memory failure	No action required, clear/ignore DTC.
B1B0047	Secondary module "A"	Software error	No action required, clear/ignore DTC.
B1B014A	Key transponder	Unknown key, communication error with key transponder when starting	No action required, clear/ignore DTC.
B1B014C	Key transponder	Key transponder not correct/new key failed programming. DTC stored at each ignition cycle until both keys are programmed.	Clear DTC and retest.
B1B0146	Key transponder	Key programming failure in learning mode. DTC registration when key programming failure	Complete key programming and clear DTC.
B1B0166	Key transponder	Repeated use of incorrect key - registration of a fault code when several codes are used in succession in an attempt to determine the transponder code	No action required, clear/ignore DTC.
B1B0187	Key transponder	Data from the key transponder is not transmitted at startup Brake/tail light bulbs not in compliance with standard Brake/tail light bulbs are faulty	Check for Other DTCs If this DTC is stored together with DTC B1C6012 in the data network module and DTC C1A5564 in the parking brake module, first repair DTC B1C6012, clear the DTCs, and recheck. Check the key transponder information and clear the DTCs.
B1B0228	Low frequency ring antenna	Permission error when transmitting data from the key transponder	No action required, clear and ignore DTC.
B1B0296	Low frequency ring antenna	Open or short circuit in the ignition key transponder ring antenna circuit	Refer to electrical manuals and check transponder circuit. Replace/repair as necessary.
B1B0353	Key with transponder #1	Theft warning - triggered when a known disabled key is inserted into the ignition	No action required, clear/ignore DTC.
B1B0392	Key with transponder #1	Incorrect password known about key. Error confirming connection with key transponder.	No action required, clear/ignore DTC.
B1B0396	Key with transponder #1	Open or short circuit in the ignition key transponder ring antenna circuit	Refer to electrical manuals and check transponder ring antenna circuit. Replace/repair as necessary.
B1B0453	Key with transponder #2	Theft warning - triggered when a known disabled key is inserted into the ignition	No action required, clear/ignore DTC.
B1B0492	Key with transponder #2	Incorrect password known about key. Error confirming connection with key transponder.	No action required, clear/ignore DTC.
B1B0553	Key with transponder #3	Theft warning - triggered when a known disabled key is inserted into the ignition	No action required, clear/ignore DTC.
B1B0592	Key with transponder #3	Incorrect password known about key. Error confirming connection with key transponder.	No action required, clear/ignore DTC.
B1B0653	Key with transponder No.4	Theft warning - triggered when a known disabled key is inserted into the ignition	No action required, clear/ignore DTC.
B1B0692	Key with transponder No.4	Incorrect password known about key. Error confirming connection with key transponder.	No action required, clear/ignore DTC.
B1B0753	Key with transponder No.5	Theft warning - triggered when a known disabled key is inserted into the ignition	No action required, clear/ignore DTC.
B1B0792	Key with transponder No.5	Incorrect password known about key. Error confirming connection with key transponder.	No action required, clear/ignore DTC.
B1B0853	Key with transponder No.6	Theft warning - triggered when a known disabled key is inserted into the ignition	No action required, clear/ignore DTC.
B1B0892	Key with transponder No.6	Incorrect password known about key. Error confirming connection with key transponder.	No action required, clear/ignore DTC.
B1B0953	Key with transponder No.7	Theft warning - triggered when a known disabled key is inserted into the ignition	No action required, clear/ignore DTC.
B1B0992	Key with transponder No.7	Incorrect password known about key. Error confirming connection with key transponder.	No action required, clear/ignore DTC.
B1B1053	Key with transponder No.8	Theft warning - triggered when a known disabled key is inserted into the ignition	No action required, clear/ignore DTC.
B1B1092	Key with transponder No.8	Incorrect password for known key. Error confirming connection with key transponder.	No action required, clear/ignore DTC.
B1B1153	Key with transponder No.9	Theft warning - triggered when a known disabled key is inserted into the ignition	No action required, clear/ignore DTC.
B1B1192	Key with transponder No.9	Incorrect password for known key. Error confirming connection with key transponder.	No action required, clear/ignore DTC.
B1B1253	Key with transponder No.10	Theft warning - triggered when a known disabled key is inserted into the ignition	No action required, clear/ignore DTC.
B1B1292	Key with transponder No.10	Incorrect password for known key. Error confirming connection with key transponder.	No action required, clear/ignore DTC.
B1B1353	Key with transponder No.11	Theft warning - triggered when a known disabled key is inserted into the ignition	No action required, clear/ignore DTC.
B1B1392	Key with transponder No.11	Incorrect password for known key. Error confirming connection with key transponder.	No action required, clear/ignore DTC.
B1B1453	Key with transponder No.12	Theft warning - triggered when a known disabled key is inserted into the ignition	No action required, clear/ignore DTC.
B1B1492	Key with transponder No.12	Incorrect password for known key. Error confirming connection with key transponder.	No action required, clear/ignore DTC.
B1B1553	Key with transponder No.13	Theft warning - triggered when a known disabled key is inserted into the ignition	No action required, clear/ignore DTC.
B1B1592	Key with transponder No.13	Incorrect password for known key. Error confirming connection with key transponder.	No action required, clear/ignore DTC.
B1B1653	Key with transponder No.14	Theft warning - triggered when a known disabled key is inserted into the ignition	No action required, clear/ignore DTC.
B1B1692	Key with transponder No.14	Incorrect password for known key. Error confirming connection with key transponder.	No action required, clear/ignore DTC.
B1B1753	Key with transponder No.15	Theft warning - triggered when a known disabled key is inserted into the ignition	No action required, clear/ignore DTC.
B1B1792	Key with transponder No.15	Incorrect password for known key. Error confirming connection with key transponder.	No action required, clear/ignore DTC.
B1B1853	Key with transponder No.16	Theft warning - triggered when a known disabled key is inserted into the ignition	No action required, clear/ignore DTC.
B1B1892	Key with transponder No.16	Incorrect password for known key. Error confirming connection with key transponder.	No action required, clear/ignore DTC.
B1B1953	Key with transponder No.17	Theft warning - triggered when a known disabled key is inserted into the ignition	No action required, clear/ignore DTC.
B1B1992	Key with transponder No.17	Incorrect password for known key. Error confirming connection with key transponder.	No action required, clear/ignore DTC.
B1B2053	Key with transponder No.18	Theft warning - triggered when a known disabled key is inserted into the ignition	No action required, clear/ignore DTC.
B1B2092	Key with transponder No.18	Incorrect password for known key. Error confirming connection with key transponder.	No action required, clear/ignore DTC.
B1B2153	Key with transponder No.19	Theft warning - triggered when a known disabled key is inserted into the ignition	No action required, clear/ignore DTC.
B1B2192	Key with transponder No.19	Incorrect password for known key. Error confirming connection with key transponder.	No action required, clear/ignore DTC.
B1B2253	Key with transponder No.20	Theft warning - triggered when a known disabled key is inserted into the ignition	No action required, clear/ignore DTC.
B1B2292	Key with transponder No.20	Incorrect password for known key. Error confirming connection with key transponder.	No action required, clear/ignore DTC.
B1B2353	Key with transponder #21	Theft warning - triggered when a known disabled key is inserted into the ignition	No action required, clear/ignore DTC.
B1B2392	Key with transponder #21	Incorrect password for known key. Error confirming connection with key transponder.	No action required, clear/ignore DTC.
B1B2453	Key with transponder #22	Theft warning - triggered when a known disabled key is inserted into the ignition	No action required, clear/ignore DTC.
B1B2492	Key with transponder #22	Incorrect password for known key. Error confirming connection with key transponder.	No action required, clear/ignore DTC.
B1B2553	Key with transponder #23	Theft warning - triggered when a known disabled key is inserted into the ignition	No action required, clear/ignore DTC.
B1B2592	Key with transponder #23	Incorrect password for known key. Error confirming connection with key transponder.	No action required, clear/ignore DTC.
B1B2653	Key with transponder #24	Theft warning - triggered when a known disabled key is inserted into the ignition	No action required, clear/ignore DTC.
B1B2692	Key with transponder #24	Incorrect password for known key. Error confirming connection with key transponder.	No action required, clear/ignore DTC.
B1B2753	Key with transponder No.25	Theft warning - triggered when a known disabled key is inserted into the ignition	No action required, clear/ignore DTC.
B1B2792	Key with transponder No.25	Incorrect password for known key. Error confirming connection with key transponder.	No action required, clear/ignore DTC.
B1B2853	Key with transponder No.26	Theft warning - triggered when a known disabled key is inserted into the ignition	No action required, clear/ignore DTC.
B1B2892	Key with transponder No.26	Incorrect password for known key. Error confirming connection with key transponder.	No action required, clear/ignore DTC.
B1B2953	Key with transponder #27	Theft warning - triggered when a known disabled key is inserted into the ignition	No action required, clear/ignore DTC.
B1B2992	Key with transponder #27	Incorrect password for known key. Error confirming connection with key transponder.	No action required, clear/ignore DTC.
B1B3053	Key with transponder No.28	Theft warning - triggered when a known disabled key is inserted into the ignition	No action required, clear/ignore DTC.
B1B3092	Key with transponder No.28	Incorrect password for known key. Error confirming connection with key transponder.	No action required, clear/ignore DTC.
B1B3153	Key with transponder No.29	Theft warning - triggered when a known disabled key is inserted into the ignition	No action required, clear/ignore DTC.
B1B3192	Key with transponder No.29	Incorrect password for known key. Error confirming connection with key transponder.	No action required, clear/ignore DTC.
B1B3253	Key with transponder No.30	Theft warning - triggered when a known disabled key is inserted into the ignition	No action required, clear/ignore DTC.
B1B3292	Key with transponder No.30	Incorrect password for known key. Error confirming connection with key transponder.	No action required, clear/ignore DTC.
B1B3386	Passing the target identifier	Communication error with engine management system	No action required, clear/ignore DTC.
B1B3387	Passing the target identifier	Communication error with engine management system	No action required, clear/ignore DTC.
B1B3486	Passing the target identifier	Communication error with engine management system	No action required, clear/ignore DTC.
B1B3487	Passing the target identifier	Communication error with engine management system	No action required, clear/ignore DTC.
B1B3501	Radio frequency scanning receiver	Communication error with scanning radio frequency receiver	No action required, clear/ignore DTC.
B1B551C	Rain sensor module	The rain sensor supply voltage is not normal	Refer to the electrical manuals and check for power to the sensor module from the CJB, repair as necessary. If power is present, no action is required, clear/ignore the DTC.
B1B5546	Rain sensor module	Rain sensor parameter/calibration memory failure: Initialization error - unable to perform optical calibration	Check the windshield for cleanliness in the sensor installation area. Check that the sensor is installed correctly on the optical element and that the optical element fits tightly to the windshield. Clear the DTC and repeat the check. If the DTC reoccurs, replace the rain/light sensor.
B1B5549	Rain sensor module	Internal failure of the electronic part of the rain sensor	Replace the rain/light sensor.
B1B5587	Rain sensor module	No response from the rain sensor module.	The rain sensor is not installed on all modifications (custom installation). Registration of the failure is prohibited by the CCF file, but if the CCF file is incorrectly configured, it is possible for the DTC to be registered by mistake. Repair is required only for vehicles with a sunroof. If necessary, see the description of the "Lost Communication" condition at the beginning of this table.
B1B5591	Rain sensor module	Rain sensor module - the measured temperature is outside the normal operating range.	No action required, clear/ignore DTC.
B1B5646	Hatch module	Hatch control module - parameter/calibration memory failure	Clear the DTC and retest. If the DTC recurs, replace the sunroof control module. Refer to the guided diagnostic routine for this code on the approved diagnostic system.
B1B564B	Hatch module	Hatch control module - overheating(sensor malfunction or lack of calibration)	If there is no customer complaint about sunroof operation, no action is required, clear/ignore the DTC. If the component operation is affected, consult the electrical manual and check the control module connector and circuit. Repair and clear the DTC as necessary. If the DTC remains and sunroof operation is not normal, replace the control module.
B1B5687	Hatch module	There is no response from the hatch module.	The hatch is not installed on all modifications (custom installation). Registration of the failure is prohibited by the CCF file, but if the CCF file is incorrectly configured, it is possible for the DTC to be registered by mistake. Repair is required only for vehicles with a sunroof. If necessary, see the description of the "Lost Communication" condition at the beginning of this table.
B1B5916	Electric motor running too long	Failure in the 5V power supply circuit for the seat adjustment sensors	Refer to the electrical manuals and check the 5V supply circuit from the seat memory module to the seat motor and circuit. If there is no 5V supply, repair/replace components as necessary.
B1B5968	Electric motor running too long	The hatch was constantly moving, which caused the electric motor to roar. (it is possible that the hatch will stop when the roar is interrupted)	No action required, clear DTC.
B1B6916	12V power supply circuit	Software error No power supply from CJB to seat memory module	If there is no customer complaint about seat operation, no action is required, clear/ignore the DTC. If seat operation is affected, consult the electrical manual and check the power and circuit of the control module. Repair and clear the DTC as necessary. If there is power to the module and no power at its output, replace the memory module.
B1B7001	LIN bus - electrical circuit No.2	SLIN bus: short circuit to battery + or ground	The SLIN bus provides serial connection of a battery-powered siren (BBUS). This system is optional, but DTC logging is determined by the CCF file (depending on whether the BBUS siren is installed or not). Repair is only required if the BBUS siren is not installed and is not working properly. See the description of the "Lost Communication" condition at the beginning of this table.
B1B7081	LIN bus - electrical circuit No.2	SLIN Bus Header Error	The SLIN bus provides serial connection of a battery-powered siren (BBUS). This system is optional, but DTC logging is determined by the CCF file (depending on whether the BBUS siren is installed or not). Repair is only required if the BBUS siren is not installed and is not working properly. See the description of the "Lost Communication" condition at the beginning of this table.
B1B7083	LIN bus - electrical circuit No.2	SLIN Bus Checksum Error	The SLIN bus provides serial connection of a battery-powered siren (BBUS). This system is optional, but DTC logging is determined by the CCF file (depending on whether the BBUS siren is installed or not). Repair is only required if the BBUS siren is not installed and is not working properly. See the "Lost Communication" condition description at the beginning of this table.
B1B8541	Memory module	Error in seat module	Replace the seat memory module If the module is suspected, refer to the warranty policy and procedures manual.
B1B8549	Memory module	Error in seat module	If there is no customer complaint about seat operation, no action is required, clear/ignore DTC. If seat operation is affected, replace module. If module is suspected, refer to warranty policy and procedures manual.
B1B8587	Memory module	Seat memory module does not respond	The seat settings memory module is not installed on all modifications (custom installation). Registration of the failure is prohibited by the CCF file, but if the CCF file is incorrectly configured, it is possible for the DTC to be registered by mistake. Repair is required only for vehicles with a sunroof. If necessary, see the description of the "Lost Communication" condition at the beginning of this table.
B1B8673	Seat Height Adjustment Motor Relay	Malfunction of the internal relay of the settings memory module (sticking)	Replace the seat memory module If the module is suspected, refer to the warranty policy and procedures manual.
B1B8693	Seat Height Adjustment Motor Relay	Software error Internal relay failure of the settings memory module	If there is no customer complaint about seat operation, no action is required, clear/ignore DTC. If seat operation is abnormal, check/replace control module. If module is suspected, refer to warranty policy and procedures manual.
B1B8731	Seat Height Movement Motor Speed/Position Sensor	Wiring/connector problem The seat height motor speed/position sensor is faulty	Refer to the electrical manuals and check the wiring harness and connectors between the seat memory module and the seat height motor. Repair/replace as necessary. If there is no circuit fault, check/replace the seat height motor.
B1B873A	Seat Height Movement Motor Speed/Position Sensor	Seat height has moved beyond expected range Open or short circuit in sensor circuit Problem with seat adjustment range Seat height motor speed/position sensor defective	Refer to electrical manuals and check the harness and connectors between the seat memory module and the seat height motor. Repair/replace as necessary. Check the seat adjustment ranges to ensure proper operation. Replace the seat height motor.
B1B8873	Seat Height Adjustment Motor Relay	Malfunction of the internal relay of the settings memory module (sticking)	Replace the seat memory module If the module is suspected, refer to the warranty policy and procedures manual.
B1B8893	Seat horizontal movement motor relay	Software error Internal relay failure of the settings memory module	If there is no customer complaint about seat operation, no action is required, clear/ignore DTC. If seat operation is not normal, check/replace control module.
B1B8931	Seat horizontal movement motor speed/position sensor	Wiring/connector problem The speed/position sensor of the electric motor of movement of the seat in the horizontal plane is faulty	Refer to the electrical equipment manuals and check the wiring harness and connectors between the seat memory module and the horizontal seat displacement motor. Repair/ replace as needed. If there is no fault in the circuit, check/replace the electric motor for moving the seat horizontally.
B1B893A	Seat horizontal movement motor speed/position sensor	Seat moved horizontally out of the expected range Sensor electrical circuit broken or short-circuited Problem with the seat setting range Sensor for speed/position of the electric motor moving the seat in the horizontal plane is defective	Refer to the electrical equipment manuals and check the wiring harness and connectors between the seat memory module and the horizontal seat displacement motor. Repair/ replace as needed. Check the seat setting ranges to ensure proper operation. Replace the electric motor for moving the seat horizontally
B1B9073	Seat tilt motor relay	Malfunction of the internal relay of the settings memory module (sticking)	Replace the seat memory module If the module is suspected, refer to the warranty policy and procedures manual.
B1B9093	Seat tilt motor relay	Software error Internal relay failure of the settings memory module	If there is no customer complaint about seat operation, no action is required, clear/ignore DTC. If seat operation is not normal, check/replace control module.
B1B9131	Seat Recline Motor Speed/Position Sensor	Wiring/connector problem Seat recline motor speed/position sensor faulty	Refer to the electrical manuals and check the wiring harness and connectors between the seat memory module and the seat recline motor. Repair/replace as necessary. If there is no circuit fault, check/replace the seat recline motor.
B1B913A	Seat Recline Motor Speed/Position Sensor	Seat reclined beyond expected range Open or shorted in sensor circuit Problem with seat adjustment range Seat recline motor speed/position sensor defective	Refer to the electrical manuals and check the wiring harness and connectors between the seat memory module and the seat recline motor. Repair/replace as necessary. Check the seat adjustment ranges to ensure proper operation. Replace the seat recline motor.
B1B9273	Electric motor relay for tilting the seat	Malfunction of the internal relay of the settings memory module (sticking)	Replace the seat memory module If the module is suspected, refer to the warranty policy and procedures manual.
B1B9293	Electric motor relay for tilting the seat	Software error Internal relay failure of the settings memory module	If there is no customer complaint about seat operation, no action is required, clear/ignore DTC. If seat operation is not normal, check/replace control module.
B1B9331	Seat tilt motor speed/position sensor	Wiring/connector problem Seat tilt motor speed/position sensor	Refer to the electrical equipment manuals and check the wiring harness and connectors between the seat memory module and the tilt motor. Repair/ replace as needed. If there is no fault in the circuit, check/replace the incline electric motor.
B1B933A	Seat tilt motor speed/position sensor	Seat has moved in recline beyond expected range Open or short circuit in sensor circuit Problem with seat adjustment range Seat recline motor speed/position sensor	Refer to the electrical manuals and check the wiring harness and connectors between the seat memory module and the seat recline motor. Repair/replace as necessary. Check the seat adjustment ranges to ensure proper operation. Replace the seat recline motor.
B1B9473	Seat lift switch	Seat lift switch sticking Seat lift switch: short to ground	Refer to the electrical manuals and check the wiring between the seat memory module and the switch cluster for a short to ground. Check the switch operation and replace if necessary.
B1B9573	Seat lowering switch	Seat Down Switch: Stuck Seat down switch: short to ground	Refer to the electrical manuals and check the wiring between the seat memory module and the switch cluster for a short to ground. Check the switch operation and replace if necessary.
B1B9673	Seat Forward Move Switch	Seat Forward Switch: Stuck Seat Forward Switch: Short to Ground	Refer to the electrical manuals and check the wiring between the seat memory module and the switch cluster for a short to ground. Check the switch operation and replace if necessary.
B1B9773	Seat Backward Move Switch	Seat rearward movement switch: sticking Seat rearward movement switch: short circuit to ground	Refer to the electrical manuals and check the wiring between the seat memory module and the switch cluster for a short to ground. Check the switch operation and replace if necessary.
B1B9873	Seat tilt up switch	Seat tilt up switch: sticking Seat tilt up switch: short to ground	Refer to the electrical manuals and check the wiring between the seat memory module and the switch cluster for a short to ground. Check the switch operation and replace if necessary.
B1B9973	Seat tilt down switch	Seat tilt down switch: sticking Seat tilt down switch: short to ground	Refer to the electrical manuals and check the wiring between the seat memory module and the switch cluster for a short to ground. Check the switch operation and replace if necessary.
B1C0073	Seat recline switch	Seat recline switch sticking Seat recline switch: short to ground	Refer to the electrical manuals and check the wiring between the seat memory module and the switch cluster for a short to ground. Check the switch operation and replace if necessary.
B1C0173	Seat recline switch	Seat recline switch sticking Seat recline switch: short to ground	Refer to the electrical manuals and check the wiring between the seat memory module and the switch cluster for a short to ground. Check the switch operation and replace if necessary.
B1C0273	Position memory function switch	Position Memory Function Switch: Stuck Position memory function switch: short circuit to ground	Refer to the electrical manuals and check the wiring between the seat memory module and the switch cluster for a short to ground. Check the switch operation and replace if necessary.
B1C0373	Memory Cell Switch #1	Memory Cell Switch #1: Stuck Memory Cell Switch #1: Short to Ground	Refer to the electrical manuals and check the wiring between the seat memory module and the switch cluster for a short to ground. Check the switch operation and replace if necessary.
B1C0473	Memory Cell Switch #2	Memory Cell Switch #2: Stuck Memory Cell Switch #2: Short to Ground	Refer to the electrical manuals and check the wiring between the seat memory module and the switch cluster for a short to ground. Check the switch operation and replace if necessary.
B1C0573	Memory Cell Switch #3	Memory Cell Switch #3: Stuck Memory Cell Switch #3: Short to Ground	Refer to the electrical manuals and check the wiring between the seat memory module and the switch cluster for a short to ground. Check the switch operation and replace if necessary.
B1C0601	Electrical circuit of the driver's mirror up/down motor and general mirror control	Open or short circuit in the mirror up/down motor circuit Mirror up/down motor failure	Refer to the electrical manuals and check the wiring between the seat memory module and the door mirror for an open circuit or short to ground. Check the operation of the mirror and replace it if necessary.
B1C0701	Electrical circuit of the electric motors for turning left/right of the driver's mirror and lifting/lowering right of the mirror	Open or short circuit in the left/right mirror rotation motor circuit Left/right mirror rotation motor failure	Refer to the electrical manuals and check the wiring between the seat memory module and the door mirror for an open circuit or short to ground. Check the operation of the mirror and replace it if necessary.
B1C0801	Electric circuit of the left/right turn motor of the passenger mirror and general control of mirrors	Open or short circuit in the left/right mirror rotation motor circuit Left/right mirror rotation motor failure	Refer to the electrical manuals and check the wiring between the seat memory module and the door mirror for an open circuit or short to ground. Check the operation of the mirror and replace it if necessary.
B1C0973	Driver's left/right mirror turn motor electrical circuit	Software error (dTC registration is possible when turning the mirror manually) Open or short circuit in the left/right mirror rotation motor circuit Left/right mirror rotation motor failure	If there is no customer complaint about the mirror operation, no action is required, clear/ignore the DTC. If the mirror operation is not normal, refer to the electrical diagrams and check the circuit for a short to ground or an open circuit. Replace the mirror/motor if necessary.
B1C1073	Driver's mirror up/down motor electrical circuit	Software error (dTC registration is possible when turning the mirror manually) Open or short circuit in the mirror up/down motor circuit Mirror up/down motor failure	If there is no customer complaint about the mirror operation, no action is required, clear/ignore the DTC. If the mirror operation is not normal, refer to the electrical diagrams and check the circuit for a short to ground or an open circuit. Replace the mirror/motor if necessary.
B1C1173	Passenger Mirror Left/Right Turn Motor Electrical Circuit	Software error (dTC registration is possible when turning the mirror manually) Open or short circuit in the left/right mirror rotation motor circuit Left/right mirror rotation motor failure	If there is no customer complaint about the mirror operation, no action is required, clear/ignore the DTC. If the mirror operation is not normal, refer to the electrical diagrams and check the circuit for a short to ground or an open circuit. Replace the mirror/motor if necessary.
B1C1273	Passenger mirror up/down motor electrical circuit	Software error (dTC registration is possible when turning the mirror manually) Open or short circuit in the mirror up/down motor circuit Mirror up/down motor failure	If there is no customer complaint about the mirror operation, no action is required, clear/ignore the DTC. If the mirror operation is not normal, refer to the electrical diagrams and check the circuit for a short to ground or an open circuit. Replace the mirror/motor if necessary.
B1C133A	Driver's mirror up/down motor feedback circuit	The electric motor of the door mirror has moved beyond the expected range Break or short circuit of the electrical circuit of the sensor Malfunction of the position sensor of the electric motor of the door mirror	Refer to electrical manuals and check the wiring harness and connectors between the seat memory module and the mirror. Repair/replace as necessary. Check/replace the mirror motor/entire assembly.
B1C143A	Driver's Mirror Left/Right Turn Motor Feedback Circuit	The electric motor of the door mirror has moved beyond the expected range Break or short circuit of the electrical circuit of the sensor Malfunction of the position sensor of the electric motor of the door mirror	Refer to electrical manuals and check the wiring harness and connectors between the seat memory module and the mirror. Repair/replace as necessary. Check/replace the mirror motor/entire assembly.
B1C153A	Passenger mirror up/down motor feedback circuit	The electric motor of the door mirror has moved beyond the expected range Break or short circuit of the electrical circuit of the sensor Malfunction of the position sensor of the electric motor of the door mirror	Refer to electrical manuals and check the wiring harness and connectors between the seat memory module and the mirror. Repair/replace as necessary. Check/replace the mirror motor/entire assembly.
B1C163A	Passenger Mirror Left/Right Turn Motor Feedback Circuit	The electric motor of the door mirror has moved beyond the expected range Break or short circuit of the electrical circuit of the sensor Malfunction of the position sensor of the electric motor of the door mirror	Refer to electrical manuals and check the wiring harness and connectors between the seat memory module and the mirror. Repair/replace as necessary. Check/replace the mirror motor/entire assembly.
B1C1773	Driver's left mirror switch	Left Mirror Switch: Sticking Left Mirror Switch: Short to Ground	Refer to the electrical manuals and check the wiring between the memory module and the mirror switch assembly for a short to ground. Check the switch operation and replace if necessary.
B1C1873	Driver's right mirror switch	Right Mirror Switch: Sticking Right Mirror Switch: Short to Ground	Refer to the electrical manuals and check the wiring between the memory module and the mirror switch assembly for a short to ground. Check the switch operation and replace if necessary.
B1C1973	Driver's mirror lift switch	Mirror up switch: sticking Mirror up switch: short circuit to ground	Refer to the electrical manuals and check the wiring between the memory module and the mirror switch assembly for a short to ground. Check the switch operation and replace if necessary.
B1C2073	Driver's mirror down switch	Mirror down switch: sticking Mirror down switch: short to ground	Refer to the electrical manuals and check the wiring between the memory module and the mirror switch assembly for a short to ground. Check the switch operation and replace if necessary.
B1C2173	Left Passenger Mirror Switch	Left Mirror Switch: Sticking Left Mirror Switch: Short to Ground	Refer to the electrical manuals and check the wiring between the memory module and the mirror switch assembly for a short to ground. Check the switch operation and replace if necessary.
B1C2273	Right Passenger Mirror Switch	Right Mirror Switch: Sticking Right Mirror Switch: Short to Ground	Refer to the electrical manuals and check the wiring between the memory module and the mirror switch assembly for a short to ground. Check the switch operation and replace if necessary.
B1C2373	Passenger Mirror Up Switch	Mirror up switch: sticking Mirror up switch: short circuit to ground	Refer to the electrical manuals and check the wiring between the memory module and the mirror switch assembly for a short to ground. Check the switch operation and replace if necessary.
B1C2473	Passenger mirror down switch	Mirror down switch: sticking Mirror down switch: short to ground	Refer to the electrical manuals and check the wiring between the memory module and the mirror switch assembly for a short to ground. Check the switch operation and replace if necessary.
B1C2593	Pedal Position Adjustment Motor Relay	Software error (electric steering column/pedal adjustment not installed) Malfunction of the internal relay of the settings memory module (sticking)	When the power steering column/pedal adjustment motor is not installed, no action is required, clear/ignore the DTC. When the power steering column/pedal adjustment motor is installed, check/replace the control module as necessary.
B1C2573	Pedal Position Adjustment Motor Relay	Software error (electric steering column/pedal adjustment not installed) Internal relay failure of the settings memory module	When the power steering column/pedal adjustment motor is not installed, no action is required, clear/ignore the DTC. When the power steering column/pedal adjustment motor is installed, check/replace the control module as necessary.
B1C263A	Electric feedback circuit of the pedal position adjustment motor	Software error The electric motor of the door mirror has moved beyond the expected range Break or short circuit of the electrical circuit of the sensor Malfunction of the position sensor of the electric motor of the door mirror	When the power steering column/pedal adjustment motor is not installed, no action is required, clear/ignore the DTC. When the power steering column/pedal adjustment motor is installed, refer to the electrical manuals and check the wiring harness and connectors between the seat memory module and the pedal height adjustment motor. Repair/replace as necessary. If there is no circuit fault, check/replace the pedal height adjustment motor.
B1C2773	Inward Pedal Shift Switch	Software error (electric steering column/pedal adjustment not installed) Pedal Position Adjustment Switch Failure (stuck in closed position)	When the power steering column/pedal adjustment motor is not installed, no action is required, clear/ignore the DTC. When the power steering column/pedal adjustment motor is installed, refer to the electrical manuals and check the pedal bias out switch circuit for a short or open circuit, and check/replace the pedal bias in switch if necessary.
B1C2873	Outward Pedal Shift Switch	Software error (electric steering column/pedal adjustment not installed) Pedal Position Adjustment Switch Failure (stuck in closed position)	When the power steering column/pedal adjustment motor is not installed, no action is required, clear/ignore the DTC. When the power steering column/pedal adjustment motor is installed, refer to the electrical manuals and check the pedal bias out switch circuit for a short or open circuit, and check/replace the pedal bias out switch if necessary.
B1C3173	Steering Column Adjustment Motor Relay	Software error (electric steering column adjustment is not installed) Steering column adjustment motor relay malfunction (stuck in on position)	When the electric steering column adjustment motor is not installed, no action is required, clear/ignore the DTC. When the electric steering column adjustment motor is installed, refer to the electrical manuals and check the steering column motor electrical circuit for a short or open circuit, and check/replace the learning module if necessary.
B1C3193	Steering Column Adjustment Motor Relay	Software error (electric steering column adjustment is not installed) Internal fault in the relay of the settings memory module	When the electric steering column adjustment motor is not installed, no action is required, clear/ignore the DTC. When the electric steering column adjustment motor is installed, check/replace the control module as necessary.
B1C3213	Steering column tilt solenoid	Software error (electric steering column adjustment is not installed) Open circuit under load of the steering column tilt solenoid electric circuit	When the power steering column adjustment motor is not installed, no action is required, clear/ignore DTC. When the power steering column adjustment motor is installed, refer to the electrical manuals and check the steering column tilt solenoid electrical circuit for a short or open circuit, and check/replace the tilt solenoid if necessary.
B1C3296	Steering column tilt solenoid	Software error (electric steering column adjustment is not installed) Thermal overload of the steering column tilt solenoid	When the power steering column adjustment motor is not installed, no action is required, clear/ignore the DTC. When the power steering column adjustment motor is installed, refer to the electrical guides and check the steering column tilt solenoid circuit for a short or open circuit. Check for other related DTCs and repair as necessary. Allow the solenoid to cool, clear the DTC and check the tilt solenoid/function operation. If the DTC remains, replace the steering column tilt solenoid as necessary.
B1C333A	Steering column tilt feedback signal	Software error (electric steering column adjustment is not installed) Steering column tilt motor moved outside expected range Open or shorted sensor circuit Motor position sensor faulty	When the power steering column adjustment motor is not installed, no action is required, clear/ignore DTC. When the power steering column adjustment motor is installed, refer to the electrical manuals and check the steering column tilt solenoid feedback circuit for a short or open circuit. Check the tilt solenoid/function operation and range of motion. Replace the tilt solenoid if necessary.
B1C3413	Steering column height adjustment solenoid	Software error (electric steering column adjustment is not installed) Open circuit under load in the electric circuit of the steering column height adjustment motor	When the power steering column adjustment is not installed, no action is required, clear/ignore DTC. When the power steering column adjustment is installed, refer to the electrical manuals and check the steering column height adjustment solenoid circuit for a short or open circuit, and check/replace the tilt solenoid if necessary.
B1C3496	Steering column height adjustment solenoid	Software error (electric steering column adjustment is not installed) Thermal overload of the steering column height adjustment solenoid	When the power steering column adjustment is not installed, no action is required, clear/ignore the DTC. When the power steering column adjustment is installed, refer to the electrical guides and check the steering column height adjustment solenoid circuit for a short or open circuit. Check for other related DTCs and repair as necessary. Allow the solenoid to cool, clear the DTC and check the solenoid/height adjustment function. If the DTC remains, replace the height adjustment solenoid as necessary.
B1C353A	Steering column height adjustment feedback signal	Software error (electric steering column adjustment is not installed) Steering column height adjustment motor moved out of acceptable range Open or short circuit in sensor circuit Malfunction of the motor position sensor	When the electric steering column adjustment motor is not installed, no action is required, clear/ignore DTC. When the electric steering column adjustment motor is installed, refer to the electrical manuals and check the steering column height adjustment solenoid feedback circuit for a short or open circuit. Check the operation of the height adjustment solenoid/function and range of motion. Replace the height adjustment solenoid if necessary.
B1C363A	Steering column tilt/height adjustment switch	Software error (electric steering column adjustment is not installed) Steering column tilt/height adjustment switch voltage out of acceptable range Open or short circuit in sensor circuit Switch malfunction	When the power steering column adjustment is not installed, no action is required, clear/ignore the DTC. When the power steering column adjustment is installed, refer to the electrical manuals and check the tilt/height steering column adjustment switch circuit for a short or open circuit. Check the operation of the tilt/height steering column adjustment switch and replace the switch if necessary.
B1C3723	Main Lock Switch: Stuck	Central locking main switch signal circuit: short circuit to ground Central locking main switch jammed Malfunction of the main switch of the central locking	Refer to the electrical manual and check the electrical circuit of the central locking master switch. Check the operation of the switch and replace it if necessary.
B1C3823	Main Release Switch: Stuck	Central unlocking main switch signal circuit: short circuit to ground Main switch jammed centrally about unlocking Malfunction of the main switch for centralized unlocking	Refer to the electrical manual and check the electrical circuit of the central unlocking master switch. Check the operation of the switch and replace it if necessary.
B1C3923	Lock Switch: Stuck	Lock switch sticking Short circuit to ground in the electrical circuit of the lock switch (when connecting) Malfunction of the lock switch Internal CJB failure	Refer to the electrical manual and verify that there are no wires connected to the SJB connector of the key lock switch circuit. Clear the DTC and retest. If the DTC remains, there may be an internal CJB failure. If there are no other DTCs, ignore this failure.
B1C4023	Lock Release Switch: Stuck	Lock release switch stuck Malfunction of the lock release switch Short circuit to ground in the electrical circuit of the lock release switch (when connecting) Internal CJB failure	Refer to the electrical manual and verify that there are no wires connected to the SJB connector of the lock release switch circuit. Clear the DTC and retest. If the DTC remains, there may be an internal CJB failure. If there are no other DTCs, ignore this failure.
B1C4123	Tailgate Release Switch No.1	Tailgate Release Switch No.1: Short to Ground Trunk lid release switch stuck Tailgate Release Switch Malfunction	Refer to the electrical guide and check the No.1 tailgate release switch circuit. Check the switch operation and replace it if necessary.
B1C4223	Tailgate Release Switch No.2	Tailgate Glass Release Switch Signal Circuit (No. 2 - License Plate Lamp and Tailgate Switch): Short to Ground Trunk lid glass release switch stuck Tailgate glass release switch malfunction	Refer to the electrical guide and check the No.2 tailgate release switch circuit. Check the switch operation and replace it if necessary.
B1C4323	Interior Light Main Switch: Stuck	Interior Light Circuit Short to Ground The interior light switch is faulty	Inspect the interior light circuit according to the electrical manual. Check the switch operation and replace if necessary.
B1C4467	Rear Window Wiper Parking Position Sensor: Stuck	Incorrect software version level (NNV502520) causes a DTC to be set when the starter is turned on or the tailgate is opened while the rear window wiper is operating. Rear Window Wiper Parking Position Sensor Circuit Short to Ground Rear Window Wiper Parking Position Sensor: Failure	Make sure that the software level is not lower than NNV502990.If necessary, update it with the diagnostic equipment recommended by the manufacturer. Delete the DTC and check again. Check the rear window wiper parking position sensor circuit in accordance with the electrical equipment manual. Delete the DTC and check again. If the DTC code is still preserved, there may be an internal failure of the rear window wiper motor, check and replace if necessary.
B1C4567	Windshield wiper parking position sensor: stuck	Incorrect software version level (NNV502520) causes a DTC to be stored when the starter is turned on or the tailgate is opened while the windshield wiper is operating. Windshield Wiper Parking Position Sensor Circuit Short to Ground Windshield wiper parking position sensor: failure	Make sure the software level is NNV502990 or higher, update if necessary using the manufacturer's recommended diagnostic equipment. Clear the DTC and retest. Refer to the electrical manual, check the windshield wiper parking position sensor circuit. Clear the DTC and retest. If the DTC remains, there may be an internal failure of the windshield wiper motor, check and replace if necessary.
B1C4623	Rear Window Washer Switch: Stuck	Rear window washer switch: short circuit to ground. The rear window washer switch is faulty	Refer to the electrical manual and check the rear window washer switch circuit. Check the switch operation and replace it if necessary.
B1C4723	Windshield Washer Switch: Stuck	Windshield washer switch: short circuit to ground. The windshield washer switch is faulty	Refer to the electrical manual and check the windshield washer switch circuit. Check the operation of the switch and replace it if necessary.
B1C4823	Headlight switch: sticking	Headlight switch: short circuit to ground The headlight switch is faulty	Refer to the electrical manual and check the electrical circuit of the headlight switch. Check the operation of the switch and replace it if necessary.
B1C5024	Ignition switch: stuck in starter position	Starter position in ignition switch: short circuit Ignition switch malfunction	Refer to the electrical manual and check the ignition switch electrical circuit. Check the operation of the switch and replace it if necessary.
B1C5329	Windshield wiper data signal intermittent	Windshield wiper intermittent operation: short circuit or open circuit Windshield wiper switch is faulty	Refer to the electrical manual and check the windshield wiper switch circuit. Check the operation of the switch and replace it if necessary.
B1C5512	Horn relay	Horn relay coil electrical circuit - short circuit to battery +	Refer to electrical manuals and check horn relay circuit. Repair if necessary.
B1C5514	Horn relay	Horn relay circuit: short to ground or open circuit	Refer to electrical manuals and check horn relay circuit. Repair if necessary.
B1C5612	Horn relay output circuit	Horn relay output circuit: short circuit to battery +	Refer to electrical manuals and check horn relay. Replace/repair if necessary.
B1C5614	Horn relay output circuit	Horn relay output circuit: short to ground or open circuit	Refer to the electrical manuals and check the power supply circuit fuse and the horn relay circuit. Repair if necessary.
B1C5712	Passive Start Ignition Relay Coil Electrical Circuit	Passive Start Ignition Relay Coil: Short to Battery +	No action required, clear/ignore DTC.
B1C5714	Passive Start Ignition Relay Coil Electrical Circuit	Passive Start Ignition Relay Output Circuit: Short to Ground or Open Circuit	No action required, clear/ignore DTC.
B1C5812	Electric window relay coil circuit	Electric window relay coil circuit: short circuit to battery +	Refer to electrical manuals and check power window relay circuit. Replace/repair as necessary.
B1C5814	Electric window relay coil circuit	Power window relay coil circuit: short to ground or open circuit	Refer to electrical manuals and check power window relay circuit. Repair as necessary.
B1C5912	Power window relay output circuit	Power window relay output circuit: short circuit to battery +	Refer to the electrical manuals and check the power window relay output circuit. Replace/repair as necessary.
B1C5914	Power window relay output circuit	Power window relay output circuit: short to ground or open circuit	Refer to the electrical manuals and check the power supply and output circuit fuses and the power window relay output circuit. Repair as necessary.
B1C6012	Parking light relay output circuit	Parking light relay output circuit: short circuit to battery + Brake/tail light bulbs not in compliance with standard Brake/tail light bulbs are faulty	A bulb failure may also cause DTC B1B0187 to be set in the body control module and DTC C1A5564 to be set in the parking brake module. A failure in this circuit that causes DTC B1C6012 to be set may also cause automatic transmission shifting problems. Check for correct tail/brake lamp bulb type, improper installation, or faults including shorted filaments. Refer to the electrical manuals and check the tail lamp relay output circuit. Replace/repair as necessary.
B1C6014	Parking light relay output circuit	Parking Light Relay Output Circuit: Short to Ground or Open Circuit	Refer to the electrical manuals and check the power supply and output circuit fuses, as well as the output circuit of the side lamp relay. Repair as necessary.
B1C6112	Battery saver relay coil electrical circuit	Short circuit to + battery of the battery charge preservation device relay coil circuit	Refer to electrical manuals and check battery saver relay circuit. Replace/repair as necessary.
B1C6114	Battery saver relay coil electrical circuit	Battery saver relay coil circuit: short to ground or open circuit	Refer to electrical manuals and check battery saver relay circuit. Repair if necessary.
B1C6212	Battery saver relay output circuit	Short circuit to + battery of the output circuit of the relay of the battery charge preservation device	Refer to electrical manuals and check battery saver relay circuit. Replace/repair as necessary.
B1C6214	Battery saver relay output circuit	Battery saver relay output circuit: short to ground or open circuit	Refer to the electrical manuals and check the power supply circuit fuse and the battery charge preservation device relay output circuit. Repair as necessary.
B1C6312	Driver Door Lock Relay Coil Circuit	Driver's door lock relay coil electrical circuit: short circuit to + battery Driver's door lock relay malfunction	Refer to the electrical manuals and check the driver's door lock relay circuit. Replace/repair as necessary.
B1C6314	Driver Door Lock Relay Coil Circuit	Driver Door Lock Relay Coil Circuit Short to Ground or Open Circuit Driver Door Lock Relay Coil Circuit High Resistance Driver's door lock relay malfunction	Refer to the electrical manuals and check the driver's door lock relay circuit. Repair as necessary.
B1C6412	Driver Door Lock Relay Output Circuit	Driver Door Lock Relay Output Circuit: Short to Battery + Driver's door lock relay malfunction	Refer to the electrical manuals and check the driver's door lock relay circuit. Replace/repair as necessary.
B1C6414	Driver Door Lock Relay Output Circuit	Driver Door Lock Relay Output Circuit: Short to Ground or Open Circuit Driver Door Lock Relay Output Circuit High Resistance Driver's door lock relay malfunction	Refer to the electrical manuals and check the driver's door lock relay output circuit. Repair as necessary.
B1C6512	Electrical circuit of the locking relay coil	Centralized locking relay coil electrical circuit: short circuit to battery + Centralized locking relay malfunction	Refer to electrical manuals and check central locking relay circuit. Replace/repair as necessary.
B1C6514	Electrical circuit of the locking relay coil	Central locking relay coil electrical circuit: short circuit to ground or open circuit Central locking relay coil electrical circuit: high resistance Central locking relay malfunction	Refer to electrical manuals and check central locking relay circuit. Repair if necessary.
B1C6612	Output circuit of the interlock relay	Centralized locking relay output circuit: short circuit to battery + Centralized locking relay malfunction	Refer to electrical manuals and check central locking relay circuit. Replace/repair as necessary.
B1C6614	Output circuit of the interlock relay	Central locking relay output circuit: short circuit to ground or open circuit Central door locking relay output circuit: high resistance Centralized locking relay malfunction	Refer to electrical manuals and check the output circuit of the central locking relay. Repair if necessary.
B1C6712	Driver Door Lock Release Relay Coil Circuit	Driver's door lock release relay coil electrical circuit: short circuit to + battery Driver's door lock release relay malfunction	Refer to the electrical manuals and check the driver's door lock release relay circuit. Replace/repair as necessary.
B1C6714	Driver Door Lock Release Relay Coil Circuit	Driver Door Lock Release Relay Coil Circuit Short to Ground or Open Circuit Driver Door Lock Release Relay Coil Circuit High Resistance Driver's door lock release relay malfunction	Refer to the electrical manuals and check the driver's door lock release relay circuit. Repair as necessary.
B1C6812	Driver Door Lock Release Relay Output Circuit	Driver Door Lock Release Relay Output Circuit: Short to Battery Driver's door lock release relay malfunction	Refer to the electrical manuals and check the driver's door lock release relay circuit. Replace/repair as necessary.
B1C6814	Driver Door Lock Release Relay Output Circuit	Driver Door Lock Release Relay Output Circuit: Short to Ground or Open Circuit Driver Door Lock Release Relay Output Circuit High Resistance Driver's door lock release relay malfunction	Refer to the electrical manuals and check the driver's door lock release relay output circuit. Repair as necessary.
B1C6912	Passenger Door Lock Release Relay Coil Electrical Circuit	Passenger Door Lock Release Relay Coil Circuit Short to Battery Centralized unlocking relay malfunction	Refer to the electrical manuals and check the passenger door lock release relay circuit. Replace/repair as necessary.
B1C6914	Passenger Door Lock Release Relay Coil Electrical Circuit	Passenger Door Lock Release Relay Coil Circuit Short to Ground Central release relay coil circuit: high resistance Centralized unlocking relay malfunction	Refer to the electrical manuals and check the passenger door lock release relay circuit. Repair as necessary.
B1C7012	Passenger Door Lock Release Relay Output Circuit	Centralized door unlocking relay output circuit: short circuit to battery + Centralized unlocking relay malfunction	Refer to the electrical manuals and check the passenger door lock release relay circuit. Replace/repair as necessary.
B1C7014	Passenger Door Lock Release Relay Output Circuit	Centralized Door Unlock Relay Output Circuit: Short to Ground Centralized Door Release Relay Output Circuit: High Resistance Centralized unlocking relay malfunction	Refer to the electrical manuals and check the passenger door lock release relay output circuit. Repair as necessary.
B1C7312	Electrical circuit of the coil of the relay of double locks	Electrical circuit of the coil of the relay of double locks: short circuit to + battery Double lock relay malfunction	Refer to the electrical manuals and check the double lock relay circuit. (if available). Replace/repair if necessary.
B1C7314	Electrical circuit of the coil of the relay of double locks	Double Lock Relay Coil Circuit Short to Ground Double Lock Relay Coil Circuit High Resistance Double lock relay malfunction	Refer to the electrical manuals and check the double lock relay circuit. (if available). Repair if necessary.
B1C7412	Double Lock Relay Output Circuit	Double Lock Relay Output Circuit: Short to Battery + Double lock relay malfunction	Refer to the electrical manuals and check the double lock relay circuit. (if available). Replace/repair if necessary.
B1C7414	Double Lock Relay Output Circuit	Double Lock Relay Output Circuit: Short to Ground Double Lock Relay Output Circuit: High Resistance Double lock relay malfunction	Refer to the electrical manuals and check the double lock relay circuit. (if available). Repair if necessary.
B1C7612	Windshield wiper high speed relay coil electrical circuit	Windshield wiper high speed relay coil circuit: short to battery +	Refer to electrical manuals and check windshield wiper high speed relay circuit. Replace/repair as necessary.
B1C7614	Windshield wiper high speed relay coil electrical circuit	Windshield wiper high speed relay coil circuit short to ground or open circuit	Refer to the electrical manuals and check the windshield wiper high speed relay circuit. Repair as necessary.
B1C7712	Rear Window Wiper High Speed Relay Coil Electrical Circuit	Rear Window Wiper High Speed Relay Coil Circuit Short to Battery	Refer to electrical manuals and check rear window wiper high speed relay circuit. Replace/repair as necessary.
B1C7714	Rear Window Wiper High Speed Relay Coil Electrical Circuit	Rear Window Wiper High Speed Relay Coil Circuit Short to Ground or Open Circuit	Refer to the electrical manuals and check the rear window wiper high speed relay circuit. Repair as necessary.
B1C7812	High Pressure Washer Relay Coil Electrical Circuit	Windshield Washer High Pressure Relay/Pump Coil Circuit Short to Battery	Refer to the electrical manuals and check the appropriate washer pump relay circuit. Repair as necessary.
B1C7814	High Pressure Washer Relay Coil Electrical Circuit	High Pressure Washer/Windshield Washer Pump Relay Coil Circuit Short to Ground or Open Circuit	Refer to the electrical manuals and check the appropriate washer pump relay circuit. Repair as necessary.
B1C7912	Windshield Washer Pump Relay Output Circuit	Windshield Washer Pump Relay Output Circuit: Short to Battery +	Refer to the electrical manuals and check the windshield washer pump relay circuit. Replace/repair as necessary.
B1C7914	Windshield Washer Pump Relay Output Circuit	Windshield Washer Pump Relay Output Circuit: Short to Ground or Open Circuit	Refer to the electrical manuals and check the power supply circuit fuse and the output circuit of the windshield washer pump relay. Repair as necessary.
B1C8012	Rear Window Washer Pump Relay Coil Circuit	Rear Window Washer Relay Coil Circuit Short to Battery +	Refer to the electrical manuals and check the rear window washer pump relay circuit. Repair as necessary.
B1C8014	Rear Window Washer Pump Relay Coil Circuit	Rear Window Washer Pump Relay Coil Circuit Short to Ground or Open Circuit	Refer to the electrical manuals and check the rear window washer pump relay circuit. Repair as necessary.
B1C8112	Rear Window Washer Pump Relay Output Circuit	Rear Window Washer Relay Output Circuit: Short to Battery	Refer to the electrical manuals and check the rear window washer pump relay circuit. Replace/repair as necessary.
B1C8114	Rear Window Washer Pump Relay Output Circuit	Rear Window Washer Pump Relay Output Circuit: Short to Ground or Open Circuit	Refer to the electrical manuals and check the power supply circuit fuse and the output circuit of the rear window washer pump relay. Repair as necessary.
B1C8212	Headlight Washer Relay A	Headlamp Washer Relay Output Circuit: Short to Battery Positive	Refer to the electrical manuals and check the headlamp washer relay circuit. (if available). Repair if necessary.
B1C8214	Headlight Washer Relay A	Headlamp Washer Relay Output Circuit: Short to Battery Positive	Refer to the electrical manuals and check the headlamp washer relay circuit. (if available). Repair/replace if necessary.
B1C8312	Rear Window Defogger Relay Coil Electrical Circuit	Rear Window Defogger Relay Coil Circuit Short to Battery Voltage	Refer to electrical manuals and check rear window defroster relay circuit. Repair as necessary.
B1C8314	Rear Window Defogger Relay Coil Electrical Circuit	Rear Window Defogger Relay Coil Circuit Short to Ground or Open Circuit	Refer to electrical manuals and check rear window defroster relay circuit. Repair as necessary.
B1C8412	Rear Window Defogger Relay Output Circuit	Rear Window Defogger Relay Output Circuit: Short to Battery Voltage	Refer to electrical manuals and check rear window defroster relay circuit. Repair/replace as necessary.
B1C8414	Rear Window Defogger Relay Output Circuit	Rear Window Defogger Relay Output Circuit: Short to Ground or Open Circuit	Refer to the electrical manuals and check the power supply circuit fuse and the rear window defogger relay output circuit. Repair as necessary.
B1C8512	Automatic headlight switch illumination relay coil electrical circuit	Automatic headlight switch illumination relay coil circuit: short circuit to battery +	Refer to the electrical manuals and check the automatic headlamp switch illumination relay circuit. (if available). Repair if necessary. If no such device is present, check the vehicle configuration. Clear/ignore DTC.
B1C8514	Automatic headlight switch illumination relay coil electrical circuit	Automatic headlight switch illumination relay coil circuit: short to ground or open circuit	Refer to the electrical manuals and check the automatic headlamp switch illumination relay circuit. (if available). Repair if necessary. If no such device is present, check the vehicle configuration. Clear/ignore DTC.
B1C8612	Automatic headlight switch illumination relay output circuit	Automatic headlight switch illumination relay output circuit: short circuit to battery +	Refer to the electrical manuals and check the automatic headlamp switch illumination relay circuit. (if available). Replace/repair if necessary. If no such device is present, check the vehicle configuration. Clear/ignore DTC.
B1C8614	Automatic headlight switch illumination relay output circuit	Automatic headlight switch illumination relay output circuit: short to ground or open circuit	Refer to the electrical manuals and check the fuse and output circuit of the automatic headlamp switch illumination relay. (if available). Replace/repair if necessary. If no such device is present, check the vehicle configuration. Clear/ignore DTC.
B1C8812	Reverse Light Relay Coil Electrical Circuit	Reverse Light Relay Coil Circuit: Short to Battery +	Refer to electrical manuals and check the reverse light relay circuit. Repair if necessary.
B1C8814	Reverse Light Relay Coil Electrical Circuit	Reverse Light Relay Coil Circuit Short to Ground or Open Circuit	Refer to electrical manuals and check the reverse light relay circuit. Repair if necessary.
B1C8912	Additional rear light relay output circuit	Additional high beam headlight relay output circuit: short circuit to battery +	Refer to the electrical manuals and check the auxiliary high beam relay circuit. (if available). Replace/repair if necessary. If no such device is present, check the vehicle configuration. Clear/ignore DTC.
B1C8914	Additional rear light relay output circuit	Auxiliary high beam relay output circuit: short to ground or open circuit	Refer to the electrical manuals and check the auxiliary high beam relay output circuit. (if available). Repair if necessary. If no such device is present, check the vehicle configuration. Clear/ignore DTC.
B1C9012	Electrical circuit of the coil of the relay of additional rear lights	Additional high beam headlights relay coil electrical circuit: short circuit to battery +	Refer to the electrical manuals and check the auxiliary high beam relay coil circuit. (if available). Repair if necessary. If no such device is present, check the vehicle configuration. Clear/ignore DTC.
B1C9014	Electrical circuit of the coil of the relay of additional rear lights	Additional high beam headlight relay coil circuit: short to ground or open circuit	Refer to the electrical manuals and check the auxiliary high beam relay coil circuit. (if available). Repair if necessary. If no such device is present, check the vehicle configuration. Clear/ignore DTC.
B1C9112	Fuel filler flap lock relay coil electrical circuit	Fuel filler flap lock relay coil electrical circuit: short circuit to battery + Fuel filler flap lock relay malfunction	Refer to the electrical manuals and check the fuel filler door/lock relay circuit. (if available). Repair if necessary. If no such device is present, check the vehicle configuration. Clear/ignore DTC.
B1C9114	Fuel filler flap lock relay coil electrical circuit	Electrical circuit of the fuel tank hatch lock relay coil: ground short circuit Fuel Filler Door Relay Coil Circuit High Resistance Fuel filler flap lock relay malfunction	Refer to the electrical manuals and check the fuel filler door/lock relay circuit. (if available). Repair if necessary. If no such device is present, check the vehicle configuration. Clear/ignore DTC.
B1C9212	Fuel filler flap lock relay output circuit	Fuel filler flap lock relay output circuit: short circuit to battery + Fuel filler flap lock relay malfunction	Refer to the electrical manuals and check the fuel filler door/lock relay circuit. (if available). Repair/replace if necessary. If no such device is present, check the vehicle configuration. Clear/ignore DTC.
B1C9214	Fuel filler flap lock relay output circuit	Fuel filler door lock relay output circuit: short to ground Fuel Filler Door Lock Relay Output Circuit High Resistance Fuel filler flap lock relay malfunction	Refer to the electrical manuals and check the fuse and output circuit of the fuel filler door/lock relay. (if available). Replace/repair if necessary. If no such device is present, check the vehicle configuration. Clear/ignore DTC.
B1C9312	Fuel filler flap release relay coil electrical circuit	Fuel filler flap release relay coil electrical circuit: short circuit to battery + Fuel filler flap release relay malfunction	Refer to the electrical manuals and check the fuel filler door/door release relay circuit. (if available). Repair if necessary. If no such device is present, check the vehicle configuration. Clear/ignore DTC.
B1C9314	Fuel filler flap release relay coil electrical circuit	Fuel filler flap release relay coil circuit: short to ground Fuel Filler Door Release Relay Coil Circuit High Resistance Fuel filler flap release relay malfunction	Refer to the electrical manuals and check the fuel filler door/door release relay circuit. (if available). Repair if necessary. If no such device is present, check the vehicle configuration. Clear/ignore DTC.
B1C9412	Fuel filler flap release relay output circuit	Fuel filler flap release relay output circuit: short circuit to battery + Fuel filler flap release relay malfunction	Refer to the electrical manuals and check the fuel filler door/door release relay circuit. (if available). Repair/replace if necessary. If no such device is present, check the vehicle configuration. Clear/ignore DTC.
B1C9414	Fuel filler flap release relay output circuit	Fuel filler door release relay output circuit: short to ground Fuel Filler Door Release Relay Output Circuit High Resistance Fuel filler flap release relay malfunction	Refer to the electrical manuals and check the fuse and output circuit of the door/fuel filler door release relay. (if available). Replace/repair if necessary. If no such device is present, check the vehicle configuration. Clear/ignore DTC.
B1C9511	Electrical circuit of additional side lights	Additional marker lamp electrical circuit: short to ground, overload or overheating	Refer to the electrical manuals and check the auxiliary marker lamp circuit. (if available). Replace/repair if necessary. If no such device is present, check the vehicle configuration. Clear/ignore DTC.
B1C9515	Electrical circuit of additional side lights	Additional side light electrical circuit: short circuit to battery + or open circuit under load	Refer to the electrical manuals and check the auxiliary marker lamp circuit. (if available). Replace/repair if necessary. If no such device is present, check the vehicle configuration. Clear/ignore DTC.
B1C9611	Anti-theft system LED	Anti-theft alarm LED circuit: short to ground or overheated	Refer to the electrical manuals and check the anti-theft LED circuit. (in the presence of volumetric sensors). Repair if necessary. If no such device is present, check the vehicle configuration. Clear/ignore DTC.
B1C9615	Anti-theft system LED	Anti-theft alarm LED electrical circuit: short circuit to battery + or open circuit under load	Refer to the electrical manuals and check the anti-theft LED circuit. (in the presence of volumetric sensors). Repair if necessary. If no such device is present, check the vehicle configuration. Clear/ignore DTC.
B1C9811	Left cornering light electrical circuit	Left cornering light circuit: short to ground, overload or overheating	Refer to the electrical manuals and check the left cornering light circuit. (if available). Replace/repair as necessary. If no such device is present, check vehicle configuration. Clear/ignore DTC.
B1C9815	Left cornering light electrical circuit	Left cornering light electrical circuit: short to battery + or open circuit under load	Refer to the electrical manuals and check the left cornering light circuit. (if available). Replace/repair as necessary. If no such device is present, check vehicle configuration. Clear/ignore DTC.
B1C9911	Right cornering light electrical circuit	Right cornering light circuit: short to ground, overload or overheating	Refer to the electrical manuals and check the right cornering light circuit. (if available). Replace/repair as necessary. If no such device is present, check vehicle configuration. Clear/ignore DTC.
B1C9915	Right cornering light electrical circuit	Right cornering light electrical circuit: short to battery + or open circuit under load	Refer to the electrical manuals and check the right cornering light circuit. (if available). Replace/repair as necessary. If no such device is present, check vehicle configuration. Clear/ignore DTC.
B1D0011	Left low beam lamp	Left low beam lamp circuit: short to ground, overload or overheating	Refer to electrical manuals and check left circuit. Repair if necessary.
B1D0015	Left low beam lamp	Left low beam lamp electrical circuit: short circuit to battery + or open circuit under load	Refer to electrical manuals and check left circuit. Repair if necessary.
B1D0111	Right low beam lamp	Right low beam lamp circuit: short to ground, overload or overheating	Refer to electrical manuals and check the right circuit. Repair if necessary.
B1D0115	Right low beam lamp	Right low beam lamp electrical circuit: short circuit to battery + or open circuit under load	Refer to electrical manuals and check the right circuit. Repair if necessary.
B1D0211	Left high beam lamp electrical circuit	Left high beam lamp circuit: short to ground, overload or overheating	Refer to electrical manuals and check left circuit. Repair if necessary.
B1D0215	Left high beam lamp electrical circuit	Left high beam lamp electrical circuit: short to battery + or open circuit under load	Refer to electrical manuals and check left circuit. Repair if necessary.
B1D0311	Right high beam lamp electrical circuit	Right high beam lamp circuit: short to ground, overload or overheating	Refer to electrical manuals and check the right circuit. Repair if necessary.
B1D0315	Right high beam lamp electrical circuit	Right high beam lamp electrical circuit: short to battery + or open circuit under load	Refer to electrical manuals and check the right circuit. Repair if necessary.
B1D0414	Upper tailgate release electrical circuit	The tailgate glass release actuator was operated more than 10 times within 1 minute Electrical circuit of the luggage compartment window release actuator: high resistance Malfunction of the actuator of the luggage compartment glass release device	Refer to the electrical manuals and check the tailgate release relay circuit. Repair as necessary.
B1D0511	Lower tailgate release electrical circuit	The tailgate release actuator was operated more than 10 times within 1 minute Electrical circuit of the actuator of the luggage compartment lid release device: short circuit to ground Malfunction of the tailgate release actuator	Refer to electrical manuals and check the tailgate circuit. Repair as necessary.
B1D0515	Lower tailgate release electrical circuit	Electrical circuit of the tailgate release actuator: short circuit to + battery Electrical circuit of the luggage compartment door release device: high resistance Malfunction of the tailgate release actuator	If there is no customer complaint about the liftgate operation, no action is required, clear/ignore the DTC. If the liftgate operation is not normal, refer to the electrical manuals and check the liftgate circuit. Repair as necessary.
B1D0611	Left turn signal	Left turn signal circuit: short to ground, overload or overheating	Refer to electrical manuals and check left circuit. Repair if necessary.
B1D0615	Left turn signal	Left turn signal electrical circuit: short to battery + or open circuit under load	Refer to electrical manuals and check left circuit. Repair if necessary.
B1D0711	Right turn signal	Right turn signal circuit: short to ground, overload or overheating	Refer to electrical manuals and check the right circuit. Repair if necessary.
B1D0715	Right turn signal	Right turn signal electrical circuit: short to battery + or open circuit under load	Refer to electrical manuals and check the right circuit. Repair if necessary.
B1D0811	Trailer Left Turn Signal Electrical Circuit	Trailer left turn signal circuit short to ground, overload or overheating	Refer to electrical manuals and check left circuit. Repair if necessary.
B1D0815	Trailer Left Turn Signal Electrical Circuit	Trailer left turn signal circuit: short to battery or open circuit under load	Refer to electrical manuals and check left circuit. Repair if necessary.
B1D0911	Trailer Right Turn Signal Electrical Circuit	Trailer Right Turn Signal Circuit Short to Ground, Overload, or Overheating	Refer to electrical manuals and check the right circuit. Repair if necessary.
B1D0915	Trailer Right Turn Signal Electrical Circuit	Trailer right turn signal circuit: short to battery or open circuit under load	Refer to electrical manuals and check the right circuit. Repair if necessary.
B1D1011	Air suspension control circuit	Air suspension control circuit short to ground, overload or overheating	Refer to electrical manuals and check the circuit. Repair if necessary.
B1D1015	Air suspension control circuit	Air suspension control circuit: short circuit to battery + or open circuit under load	Refer to electrical manuals and check the circuit. Repair if necessary.
B1D1211	Electrical power supply circuit for volumetric sensors	Electrical power supply circuit for volumetric sensors: short to ground, overload or overheating	Refer to electrical manuals and check the circuit. Repair if necessary.
B1D1215	Electrical power supply circuit for volumetric sensors	Electrical power supply circuit of volumetric sensors: short circuit to + battery or open circuit under load	Refer to electrical manuals and check the circuit. (in the presence of volumetric sensors). Repair if necessary. If no such device is present, check the vehicle configuration. Clear/ignore DTC.
B1D1311	Interior Lighting Electrical Circuit A	Interior Light A Circuit Short to Ground, Overload, or Overheating	Refer to electrical manuals and check the circuit. Repair if necessary.
B1D1315	Interior Lighting Electrical Circuit A	Software error Interior Light Circuit A: Short to Battery + or Open Circuit Under Load	If there is no customer complaint about interior light operation, no action is required, clear/ignore DTC. If interior light operation is abnormal, refer to electrical manuals and check circuit. Repair as necessary.
B1D1411	Interior Lighting Electrical Circuit B	Interior Light Circuit B Short to Ground, Overload, or Overheating	Refer to electrical manuals and check the circuit. Repair if necessary.
B1D1415	Interior Lighting Electrical Circuit B	Software error Interior Light Circuit B: Short to Battery + or Open Circuit Under Load	If there is no customer complaint about interior light operation, no action is required, clear/ignore DTC. If interior light operation is abnormal, refer to electrical manuals and check circuit. Repair as necessary.
B1D1512	General opening/closing electrical circuit	General opening/closing electrical circuit: short circuit to battery +	Refer to electrical manuals and check the circuit. Repair if necessary.
B1D1749	Self-powered siren (BBUS)	BBUS Siren: Communication Error	The BBUS siren is not installed on all modifications (custom installation). Registration of the failure is prohibited by the CCF file, but if the CCF file is incorrectly configured, a DTC may be registered by mistake. Repair is only required for vehicles with a BBUS siren. If the device is present, see the description of the "Lost Communication" condition at the beginning of this table.
B1D1787	Self-powered siren (BBUS)	Lost connection with BBUS siren	The BBUS siren is not installed on all modifications (custom installation). Registration of the failure is prohibited by the CCF file, but if the CCF file is incorrectly configured, a DTC may be registered by mistake. Repair is only required for vehicles with a BBUS siren. If the device is present, see the description of the "Lost Communication" condition at the beginning of this table.
B1D1887	Volumetric sensor	Volumetric sensor - no response signal: Error receiving response signal pulse	The volumetric sensor is not installed on all modifications (custom installation). Registration of the failure is prohibited by the CCF file, but if the CCF file is incorrectly configured, a DTC may be registered by mistake. Repair is required only for vehicles with a volumetric sensor. If the device is present, see the description of the "Lost Communication" condition at the beginning of this table.
B1D3523	Hazard warning switch stuck	Hazard warning switch circuit: short to ground The hazard warning switch is faulty	Check the operation of the hazard warning switch, refer to the electrical manual and check its circuit. Repair/replace as necessary.
B1D3613	Turn signal switch	Electrical connection circuit of the indicator switch: open circuit	Refer to electrical manuals and check switch circuit. Replace/repair as necessary.
B1D3713	Wiper Switch Electrical Circuit	Windscreen wiper switch wiring circuit: open circuit	Refer to electrical manuals and check switch circuit. Replace/repair as necessary.
B1D3813	Windshield wiper motor	Windshield wiper motor electrical circuit: open circuit	Refer to electrical manuals and check switch circuit. Replace/repair as necessary.
B1D3913	Rear window wiper motor	Rear Window Wiper Motor Electrical Circuit: Open Circuit	Refer to electrical manuals and check switch circuit. Replace/repair as necessary.
B1D4013	Electrical circuit for connecting the light switch	Light Switch Wiring Circuit: Open Circuit	Refer to electrical manuals and check switch circuit. Replace/repair as necessary.
B1D4113	Electrical circuit for connecting the bonnet end sensor	Hood Not Closed Sensor Circuit High Resistance Malfunction of the hood not closing tightly sensor	Refer to electrical manuals and check sensor circuit. Replace/repair as necessary.
B1D4213	Electrical circuit for connecting the driver's door lock	Driver's door ajar sensor: high resistance Malfunction of the sensor of loose closing of the driver's door	Refer to electrical manuals and check the lock circuit. Replace/repair as necessary.
B1D4313	Electrical circuit for connecting the passenger door lock	Front passenger door not closed tightly sensor: high resistance Front passenger door not closing tightly sensor malfunction	Refer to electrical manuals and check the lock circuit. Replace/repair as necessary.
B1D4413	Electrical circuit for connecting the left rear door lock	Left rear door not closing tightly sensor: high resistance Malfunction of the sensor for loose closing of the left rear door	Refer to electrical manuals and check the lock circuit. Replace/repair as necessary.
B1D4513	Electrical circuit for connecting the right rear door lock	Right rear door not closing tightly switch: high resistance Malfunction of the right rear door ajar sensor	Refer to electrical manuals and check the lock circuit. Replace/repair as necessary.
B1D4613	Electrical circuit for connecting the luggage compartment door lock	Tailgate Ajar Sensor Circuit High Resistance Malfunction of the sensor of loose closing of the luggage compartment door	Refer to electrical manuals and check the lock circuit. Replace/repair as necessary.
B1D9749	Tilt sensor	Lost connection with tilt sensor	BBUS Siren (together with tilt sensor) not installed on all modifications (custom installation). Registration of the failure is prohibited by the CCF file, but if the CCF file is incorrectly configured, a DTC may be registered by mistake. Repair is only required for vehicles with a BBUS siren on which the tilt sensor operation is not normal. If the device is present, see the description of the "Lost Communication" condition at the beginning of this table.
U007388	Control Module Data Bus A Disabling	Software/hardware incompatibility Bus Disabled: Automatic Temperature Control (ATC) Module Bus disabled: aCm Bus Disabled: Adaptive Cruise Control Module (speed control) (ACC) Bus Disabled: Active Stability Control Module Bus Disabled: Terrain Response Control Module (ATCM) Bus Disconnected: Body Control Module (BCM) Bus Disabled: Parking Assistance Module (PAM) Bus Disconnected: Electronic Parking Brake (EPB) Module Bus Disabled: Dynamic Suspension Module Bus Disconnected: Steering Angle Sensor (SAS) Bus Disabled: Traction Control Module (TCCM) Tire Disabled: Tire Pressure Monitoring System (TPMS) Module Bus Disabled: Restraint Control Module (RCM)	Check if the latest update file is installed (is in the GTR system). If the Passenger/Driver Classification System (OCS) is not installed, change the configuration of the Auxiliary Restraint System (RCM) control module using a diagnostic system approved by the manufacturer. Delete all DTC codes and perform a road test of the car. If the problem persists, contact your dealer's technical support team for more information. It is strictly forbidden to replace any components and parts to fix this problem. If the OCS system is installed on the vehicle, check for other DTC codes related to the auxiliary restraint system.
U015587	Lost connection with IPK	ABS Module: No Message ACC Module: No Message Active Stability System Module: No Message ATCM: No message BCM: No message FLM: No message PAM: No message EPB Module: No Message RCM: No message Dynamic Suspension Module: No Message TCCM: No message TCM: No message TPMS: No Message	See the description of the "Connection Lost" condition at the beginning of this table.
U016487	Lost connection with ATC module	Auxiliary Heater Control Module: No Message BCM: No message IPK: No message TPMS: No Message	See the description of the "Connection Lost" condition at the beginning of this table.
U030055	Internal control module software incompatibility	ATC module configuration is not configured Audio block configuration is not set up AHCM module configuration is not configured ACC module configuration is not configured The active stabilization system module configuration is not configured ATCM module configuration is not set BCM module configuration is not configured PAM module configuration is not configured EPB configuration not set RDCM module configuration is not configured Dynamic suspension module configuration not set SAS module configuration not set TCM module configuration not set TPMS module configuration is not set RCM module configuration is not configured	Configure the module(s) using an approved diagnostic system.
U1A0387	Vehicle configuration parameter	Lost Communication with BCM/RCM: No Message	See the description of the "Connection Lost" condition at the beginning of this table.
U1A1448	CAN initialization failure	ASM control software failure	Configure the module using an approved diagnostic system.
U200168	Reduced system performance	Reduced System Performance in ABS/BCM/TEL Module Event Information Voltage is greater than 16.8 (- 0.4) V or less than 8.6 (+ 0.4) V for more than 30 seconds	Check for ABS DTCs Refer to the appropriate section in the service manual.

Diagnostics of data transmission for media systems (MOST)

Basic recommendations are given in the section "Description and principle of operation": in particular, it is indicated that you should not try to repair fiber optic cables. Additional precautions:

• Avoid touching exposed ends of fiber optic cables as this may cause contamination.
• Whenever you disconnect a fiber optic cable, cover the electrical connectors with plugs to prevent dust from getting into them.
• Do not expose fiber optic cables to heat.
• Do not bend fiber optic cables with a bending radius less than 25 mm.
• Do not use laser pointers to test the ability of fiber optic cable to transmit light. A special tester for MOST network modules and fiber optic wiring harnesses is provided to diagnose and test the ability of fiber optic cables to transmit light.

Tester for MOST

Before connecting the tester to the network, turn on the unit and check if the red indicator lights up. meals included.

If not, the battery should be replaced before using the tester.

Self-test 2+0

1. Set the connector selection switch to the 2+0 position.

2. Select the sound signal or LED on the tester, depending on what indication you want to receive.

3. Turn on the tester and check the power indicator.

4. Insert the supplied 2+0 loop test lead into the 2+0 connector housing until it clicks into place.

5. Press the red test button in the center of the tester.

6. Depending on the choice you made in step 2, the tester will either beep or turn on the green indicator.

If the tester continues to beep or the indicator does not go out after releasing the test button, this does not indicate a malfunction, but rather indicates that the tester is experiencing signal feedback, which stops after the loop test lead is disconnected.



Self-test 2+4

Perform the self-test in the same way as the 2+0 test, but use the 2+4 loop test jumper cable and set the connector select switch to the 2+4 position.

Car diagnostics

CAUTION: Make sure that the tester is not connected to the MOST network when the tester is turned on or switching between 2+0 and 2+4 modes, since the tester emits a short light pulse that may cause network problems.

1. Use the prescribed diagnostic system or scanner to retrieve DTCs.

2. Set the connector selection switch to the 2+0 position.

3. Disconnect the intermediate connector of the fiber optic cable and connect the plug part to the tester connector on the top of the unit using the included adapter.

4. Turn on the tester and check the power indicator.

5. Set the LED/Horn switch to the LED position.

6. Turn the ignition key to the ON position.

7. If the green LED is lit, this indicates that a signal has been received, i.e. it indicates that the first half of the optical ring is functioning.

8. If the green LED is OFF, this indicates that the signal is not received, i.e. the first half of the optical ring is NOT FUNCTIONING.

As a result, a ring break code should be set. Use the prescribed diagnostic system to troubleshoot the fault and clear the code. As a result, a ring break code should be set. Use the prescribed diagnostic system to troubleshoot the fault and clear the code.