NOTE: Universal Scan Tools may not read the listed codes or may 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 problem (the last 2 digits give additional information read by the approved diagnostic system).
NOTE: Intermittent faults may cause a DTC to be logged, however some DTCs may be cleared in an ignition off/on cycle. Carry out a road test (if it's safe), check system functionality and read all DTCs before turning off the ignition.
DTC | Description | Possible reasons | Action |
P056200 | Low voltage in the system | The supply voltage of the rear differential control unit is below 9 V | Check the state of charge, refer to the electrical manual and check the differential actuator circuit, repair if necessary. |
P056300 | High voltage in the system | The supply voltage of the rear differential control unit is below 16 V | Check charging circuit and power status. |
P060400 | Direct access memory error (RAM) internal control module | Internal error of the rear differential control unit | Clear the DTCs and recheck. If the problem persists, replace the control unit. If a module is suspected, refer to the warranty policy and procedures manual. |
P060500 | Read Only Memory Error (ROM) internal control module | Internal error of the rear differential control unit | Clear the DTCs and recheck. If the problem persists, replace the control unit. If a module is suspected, refer to the warranty policy and procedures manual. |
P060600 | Control unit processor | Reset monitoring device | This is a control unit internal test DTC and does not necessarily indicate a malfunction. If no other DTCs are logged and there are no customer complaints, clear/ignore this DTC. |
P060700 | Control unit performance problems | Internal error of the rear differential control unit | Clear the DTCs and recheck. If the problem persists, replace the control unit. If a module is suspected, refer to the warranty policy and procedures manual. |
P065200 | Low circuit reference"IN" sensor | The supply voltage of the internal position sensor of the actuator is below 57V | Refer to the electrical manual and check the differential actuator position sensor circuit, repair as necessary. If the circuit is OK, replace the differential actuator. |
P065300 | High reference voltage in the circuit"IN" sensor | The supply voltage of the internal position sensor of the actuator is below 83V | Refer to the electrical manual and check the differential actuator position sensor circuit, repair as necessary. If the circuit is OK, replace the differential actuator. |
P066600 | Electrical circuit "A" PCM/ECM/TCM internal temperature sensor | Rear Differential Control Module Internal Temperature Sensor Value Exceeds 105°C | This is a control unit internal test DTC and does not necessarily indicate a malfunction. If no other DTCs are logged and there are no customer complaints, clear that DTC and recheck. If the problem persists, replace the control unit. If a module is suspected, refer to the warranty policy and procedures manual. |
P071200 | Low voltage in the sensor circuit "A" transmission fluid temperature | Open or short to ground in the electrical circuit of the internal temperature sensor of the differential actuator | Refer to the electrical manual and check the differential actuator sensor circuit, repair if necessary. If the circuit is OK, replace the differential actuator. |
P071300 | High voltage in the electrical circuit of the sensor "A" transmission fluid temperature | Rupture or short circuit on + the accumulator of an electric chain of the sensor of internal temperature of the executive device of differential | Refer to the electrical manual and check the differential actuator sensor circuit, repair if necessary. If the circuit is OK, replace the differential actuator. |
P080600 | Clutch Actuator Position Sensor Electrical Range/Performance Problems | Mismatch between actual and expected/calculated position of actuator Differential actuator internal error | Calibrate the clutch and range mechanism using an approved diagnostic system or according to the procedure specified in the design and operation description. Refer to the relevant section in the workshop manual. Clear the DTCs and recheck. If the problem persists, replace the differential actuator. |
P080700 | Clutch Actuator Position Sensor Circuit Low Voltage | Differential actuator internal position sensor open circuit to power, ground, signal circuit 1 or 2, or short to ground in the power circuit, signal circuit 1 or 2 | Refer to the electrical manual and check the differential actuator circuit, repair if necessary. If the circuit is OK, replace the differential actuator. |
P080800 | High voltage in the electrical circuit of the clutch actuator position sensor | Short to battery + signal circuit 1 or 2 internal differential actuator position sensor | Refer to the electrical manual and check the differential actuator circuit, repair if necessary. If the circuit is OK, replace the differential actuator. |
P080A00 | Clutch position not programmed | Using an approved diagnostic system, calibrate the rear differential control module. Clear the DTCs and recheck. If the problem persists, replace the rear differential assembly. If a differential is suspected, refer to the warranty policy and procedures manual. | |
P089400 | Gearbox slippage | Slippage of the internal electromagnetic brake of the differential actuator | Replace differential actuator. |
P090000 | Break in the electrical circuit of the clutch actuator | Break in the electrical circuit of the power supply of the differential actuator | Refer to the electrical manual and check the differential actuator circuit, repair if necessary. |
P090100 | Clutch Actuator Electrical Range/Performance Problems | Short circuit of the electric power supply circuit of the differential actuator | Refer to the electrical manual and check the differential actuator circuit, repair if necessary. |
P090200 | Low voltage in the electrical circuit of the clutch actuator | Short circuit to ground in the differential actuator power supply circuit. | Refer to the electrical manual and check the differential actuator circuit, repair if necessary. |
P090300 | High voltage in the electrical circuit of the clutch actuator | Short circuit to battery + differential actuator power supply circuit | Refer to the electrical manual and check the differential actuator circuit, repair if necessary. |
P160300 | EEPROM failure | Internal error of the rear differential control unit | Clear the DTCs and recheck. If the problem persists, replace the control unit. If a module is suspected, refer to the warranty policy and procedures manual. |
P178300 | Transmission overheating condition | Rear differential oil sump temperature sensor value exceeds 150°C | Check the customer's complaint and vehicle usage at the time the DTC was logged. Check the operation of the rear differential. Check the oil level and specification in the rear differential. Refer to the relevant section in the workshop manual. Clear the DTCs and recheck. If the problem persists, replace the rear differential assembly. If a differential is suspected, refer to the warranty policy and procedures manual. |
P186A00 | Rupture of an electric chain of management of a brake of the executive device of blocking of differential | Break in the electrical circuit of the power supply terminals of the internal electromagnetic brake of the actuator | Refer to the electrical manual and check the differential actuator circuit, repair if necessary. If the circuit is OK, replace the differential actuator. |
P186B00 | Differential Lock Actuator Brake Control Circuit Low Voltage | Short circuit to ground on the pins of the internal electromagnetic brake of the differential actuator | Refer to the electrical manual and check the differential actuator circuit, repair if necessary. If the circuit is OK, replace the differential actuator. |
P186C00 | Differential Lock Actuator Brake Control Circuit High Voltage | Short circuit to battery + of both pins of the internal electromagnetic brake of the differential actuator | Refer to the electrical manual and check the differential actuator circuit, repair if necessary. If the circuit is OK, replace the differential actuator. |
P186D00 | Clutch actuator sticking | Actuator malfunction | Using an approved diagnostic system, calibrate the rear differential clutch control module/actuator. Clear the DTCs and recheck. If the problem persists, replace the actuator. |
P274200 | Low voltage in the sensor circuit "IN" transmission fluid temperature | Short to ground in the rear differential oil pan temperature sensor circuit | Refer to the electrical manual and check the differential oil temperature sensor circuit, repair if necessary. |
P274300 | High voltage in the electrical circuit of the sensor "IN" transmission fluid temperature | Open or short to battery + rear differential oil pan temperature sensor electrical circuit | Refer to the electrical manual and check the differential oil temperature sensor circuit, repair if necessary. |
P278500 | Clutch actuator temperature too high | The value of the actuator's internal temperature sensor exceeds 150°C. Prolonged off-road use. Insufficient oil volume. Wrong oil specification. Internal differential fault | Check the customer's complaint and vehicle usage at the time the DTC was logged. Check the operation of the rear differential. Check the oil level and specification in the rear differential. Refer to the relevant section in the workshop manual. Clear the DTCs and recheck. If the problem persists, replace the rear differential assembly. If a differential is suspected, refer to the warranty policy and procedures manual. |
P278700 | Clutch temperature too high | Temperature (estimated) clutch friction plate pack exceeds 200°C | Check the customer's complaint and vehicle usage at the time the DTC was logged. Check the operation of the rear differential. Check the oil level and specification in the rear differential. Refer to the relevant section in the workshop manual. Clear the DTCs and recheck. If the problem persists, replace the rear differential assembly. If a differential is suspected, refer to the warranty policy and procedures manual. |
U000188 | High speed CAN data bus | High speed CAN data bus (CAN bus disabled) | Refer to section "Network communication" in the workshop manual. |
U010287 | Loss of communication with the transfer box control unit | Loss of communication with TCCM | Refer to status description "Bus disabled" in section 418-00 of the workshop manual. Refer to section "Network communication" in the workshop manual. |
U012287 | Lost Communication with Vehicle Dynamics Control Module | Loss of communication with VDM | Refer to status description "Bus disabled" in section 418-00 of the workshop manual. Refer to section "Network communication" in the workshop manual. |
U030055 | Internal control unit software incompatibility | Rear differential control unit not configured | Configure the module using an approved diagnostic system. |
U1A1449 | CAN initialization failure | Configure the module using an approved diagnostic system. Clear the DTCs and recheck. If the problem persists, replace the control unit. If a module is suspected, refer to the warranty policy and procedures manual. |
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