Diagnostics and testing of the video system (Discovery 3)

Review

The video system networks a number of vehicle networks and modules to provide a complete entertainment package for passengers.

Due to the complexity of the system, there are a number of different methods used to diagnose the system, as the networks used include the medium speed CAN bus, the MOST system (data transmission system for media systems) and other system-dependent methods.

Information about the video system and its operation can be found in the relevant section of the service station manual.

Information about networks and their operation can be found in the Network Communication section of the Service Station Manual.

Inspection and verification

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

2. Visually inspect for obvious mechanical and electrical problems.

Mechanical factors	Electrical factors
Front Touch Screen Display (TSD) Installation and Status Rear Seat Entertainment (RSE) Screen Installation and Status Installation and condition of DVD changer TV antennas (two on each rear side window)	Fuses CJB - fuse 42P CJB - fuse 52P CJB - fuse 53P CJB - fuse 57P CJB - fuse 58P Wiring harnesses Fiber Optic Wiring Harnesses Relay for the complex of information and entertainment systems and equipment Display screens DVD changer TV tuner module RSE module TV Antenna Amplifiers (4) Remote control and batteries

3. If an obvious cause for the problem you identified or the customer described is found, resolve it before proceeding with further actions. (if possible).



4. Use the approved diagnostic system or scan tool to retrieve all diagnostic trouble codes (DTCs) before referring to the symptom chart or DTC index.

Since DTCs are stored in more than one module, a full vehicle data read is recommended.

Clear all DTCs after troubleshooting.

Table of signs of malfunction

Sign of malfunction	Possible reasons	Actions
DVD player not working	DVD changer fuse blown No power supply to screens Condensation	Check the DVD circuits for short circuits causing the fuse to blow and make any necessary repairs. Consult your electrical manual. Check the power supply to the screens and make any necessary repairs. Consult your electrical manual. Wait at least an hour for the condensation to dry.
Remote control is unstable	Low voltage of phone batteries Contamination of the remote control receiver or transmitter sensor	Check and replace batteries if necessary. Check and clean the receiver and transmitter if necessary.
No image available	The display screen is set to the wrong mode.	Use the switch on the back of the phone handset to select the correct mode.
Playback does not start	The disc is loaded upside down The disk loaded is of the wrong format. "Parental lock" is set up The installation menu is displayed.	Make sure the disc is loaded correctly. Make sure the disc format is compatible. Cancel the parental lock or check the disc rating. Press SET for at least 2 seconds to exit the setup menu.
The image is unclear or has interference	The disc is quickly "rewound" forward or backward Low voltage of car battery	The image may be slightly distorted in the forward or rewind modes. Check the condition and charge level of the car battery.
The image "freezes"	The disc is scratched	Load an undamaged disc.
NO MAG is displayed	Magazine not loaded in DVD changer	Load the store.
NO DISC is displayed	The disk is not loaded into the store Dirty disk	Load the disc into the magazine. Clean the disc if necessary.
REGIONAL CODE VIOLATION is displayed	The loaded disc does not match the region code number	Load the disc that matches the region code number.
VIDEO SIGNAL IS NOT CORRECT is displayed	NTSC disc loaded into PAL system, or vice versa	Please load a disc of the correct format.
HI TEMP is displayed	The system's electrical protection circuit has been activated because it has detected high temperature.	Turn the power to the unit OFF and then back on. If the display does not clear, leave the power OFF until the temperature decreases and turn the power ON again.

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).

DTC codes	Description	Possible reasons	Action
B100E25	Input video signal "A"	Disabling the TV/Rear Seat Entertainment System Video Input TV/DVD malfunction	Make sure the input signal is connected and the system is transmitting.
B101025	Input video signal "C"	Rear camera video input is disabled Camera malfunction	Make sure the input signal is connected and the system is transmitting.
B1A0016	Control module	Control module: voltage in circuit below threshold Voltage less than (main control module voltage - 2 V) for more than 10 sec. Low battery voltage Control Module Circuit High Resistance	Check the battery condition and charge. Refer to the relevant section in the service station manual. Check the module power and ground electrical circuits. Refer to the electrical equipment manual.
B1A0017	Control module	Control module circuit voltage above threshold High battery voltage (reload) Control module electrical circuit: short circuit to battery +	Check the battery condition and charge. Refer to the relevant section in the service station manual. Check the module power and ground electrical circuits. Refer to the electrical equipment manual.
B1A0044	Control module	Rear Entertainment Module - Memory Failure	If a module is suspected, refer to the warranty policy and procedures manual.
B1A0048	Control module	Control module control software malfunction	Configure the module using an approved diagnostic system. If the module is suspect, refer to the warranty policy and procedures manual.
B1A0049	Control module	Internal failure of the electrical part of the amplifier (can be installed in several modules) Internal electrical failure of the touch screen display (TSD) (can be installed in several modules)	Check the module power and ground circuits. Refer to the electrical manual. If the module is suspect, refer to the warranty policy and procedures manual.
B1A0098	Control module	Rear Entertainment Control Module, Element or System Overheating	Check the module and electrical circuits. Refer to the electrical manual. Clear the DTC and retest. Consider atmospheric conditions before discarding the module.
B1A5611	Antenna	Antenna electrical circuit: short circuit to ground	Refer to the electrical guide and check the antenna circuit. Refer to the guided diagnostic program for this code on the approved diagnostic system.
B1A5612	Antenna	Antenna electrical circuit: short circuit to battery +	Refer to the electrical guide and check the antenna circuit. Refer to the guided diagnostic program for this code on the approved diagnostic system.
B1A5613	Antenna	Antenna electrical circuit: high resistance	Refer to the electrical guide and check the antenna circuit. Refer to the guided diagnostic program for this code on the approved diagnostic system.
B1D5079	DVD player	DVD Changer: Mechanical Failure Error Report by AiNet	Check for mechanical failure (jamming of the magazine, etc.). Repair if necessary.
B1D5093	DVD player	DVD changer not responding Data transfer error between main microprocessor and DVD microprocessor No response from AiNet	Refer to the electrical manual and check the AiNet electrical circuits. Repair if necessary.
B1D5098	DVD player	High temperature condition detected	Check the DVD module installation. Ensure there is sufficient air flow. Clear the DTC and retest. Consider atmospheric conditions before discarding the module.
B1D5511	Antenna No.2	Antenna 2 Circuit Short to Ground	Check the antenna and electrical circuits. Refer to the electrical equipment manual.
B1D5512	Antenna No.2	Antenna 2 electrical circuit: short circuit to + battery	Check the antenna and electrical circuits. Refer to the electrical equipment manual.
B1D5513	Antenna No.2	Antenna Circuit 2: High Resistance	Check the antenna and electrical circuits. Refer to the electrical equipment manual.
B1D5611	Electrical circuit of antenna No.3	Antenna 3 Circuit Short to Ground	Check the antenna and electrical circuits. Refer to the electrical equipment manual.
B1D5612	Electrical circuit of antenna No.3	Antenna 3 electrical circuit: short circuit to battery +	Check the antenna and electrical circuits. Refer to the electrical equipment manual.
B1D5613	Electrical circuit of antenna No.3	Antenna Circuit 3: High Resistance	Check the antenna and electrical circuits. Refer to the electrical equipment manual.
B1D5711	Electrical circuit of antenna No.4	Antenna 4 Circuit Short to Ground	Check the antenna and electrical circuits. Refer to the electrical equipment manual.
B1D5712	Electrical circuit of antenna No.4	Antenna 4 electrical circuit: short circuit to battery +	Check the antenna and electrical circuits. Refer to the electrical equipment manual.
B1D5713	Electrical circuit of antenna No.4	Antenna Circuit 4: High Resistance	Check the antenna and electrical circuits. Refer to the electrical equipment manual.
B1D5811	TV output signal	TV output signal circuit: short circuit to ground	Check the TV output circuits. Refer to the electrical equipment manual.
B1D5812	TV output signal	TV output circuit: short circuit to battery +	Check the TV output circuits. Refer to the electrical equipment manual.
B1D5813	TV output signal	TV signal output circuit: high resistance	Check the TV output circuits. Refer to the electrical equipment manual.
B1D8193	Left Rear Display Module	Left rear display not responding Data transmission error between main microprocessor and left display microprocessor No response from IS bus	Check the IS bus electrical circuits. Refer to the electrical equipment manual.
B1D8198	Left Rear Display Module	High temperature condition detected	Clear DTC and retest. Consider atmospheric conditions before discarding module.
B1D8293	Right Rear Display Module	Right rear display not responding Data transmission error between main microprocessor and right display microprocessor No response from IS bus	Check the IS bus electrical circuits. Refer to the electrical equipment manual.
B1D8298	Right Rear Display Module	High temperature condition detected	Clear DTC and retest. Consider atmospheric conditions before discarding module.
U1A0131	Data exchange channel	NOTE: A message is displayed "NO NAVIGATION AVAILABLE" (navigation is not available) Navigation system module touch screen display (TSD), video interface (GVIF) malfunction GVIF disconnected GVIF - short to ground, short to battery +, open circuit	Check if the GVIF circuit connectors are connected correctly. Refer to the electrical diagrams and check the electrical circuits of the GVIF multimedia module for short circuit to ground, short circuit to battery +, or open circuit.
U1A1731	Rear Entertainment Module (REM) MOST Ring Network Break Message	No signal from rear entertainment module (REM) Fiber optic ring break condition detected	Perform a MOST General Check. Refer to the Network Communications section of the workshop manual and use an approved diagnostic system.
U1A2087	MOST Ring Network Break Message from TVM	No signal from TVM Fiber optic ring break condition detected	Perform a MOST General Check. Refer to the Network Communications section of the workshop manual and use an approved diagnostic system.
U300068	Control module	Audio Module Event Information - MOST Transceiver Overheating	Refer to the electrical manuals and check the power and ground circuits of the unit. Check the MOST circuit. Perform a general MOST test. Refer to the Network Communications section of the workshop manual and use an approved diagnostic system. If in doubt about the module's functionality, refer to the warranty policy and procedures manual.