Symptom Chart

SYMPTOM	MESSAGE	POSSIBLE CAUSES	ACTION
Traction Reduced message displayed via the instrument cluster	Traction Reduced	TCCM integrated actuator internal/mechanical failure/overtemperature Rear Differential Control Module (RDCM) fault ABS fault Suspension Control Module (ISCM) fault (applies to L494 only) CAN fault Harness or power supply fault	Using Jaguar Land Rover approved diagnostic equipment, read the DTCs and refer to the relevant DTC index. Complete the appropriate Guided Flow as specified via the Pathfinder tool Using Jaguar Land Rover approved diagnostic equipment, check the snapshot data to determine the missing message source control module on the FlexRay network. Check the relevant control module for related DTCs and refer to the relevant DTC index
Loss Of Drive message displayed via the instrument cluster	Loss Of Drive	TCCM integrated actuator internal/mechanical failure/overtemperature Harness or power supply fault	Using Jaguar Land Rover approved diagnostic equipment, read the DTCs and refer to the relevant DTC index. Complete the appropriate Guided Flow as specified via the Pathfinder tool
A range change is not initiated when the high/low range switch is pressed	Range Change Not Available	TCCM internal/mechanical failure/overtemperature Rear Differential Control Module (RDCM) fault Transmission Control Module (TCM) fault Harness or power supply fault	Using Jaguar Land Rover approved diagnostic equipment, read the DTCs and refer to the relevant DTC index. Complete the appropriate Guided Flow as specified via the Pathfinder tool
		Power supply voltage to TCM is less than 11v	Using Jaguar Land Rover approved diagnostic equipment, check datalogger signals - Main ECU Voltage Supply (0xDD02) and Control Module Voltage (0xF442). If the power supply to the module is below 11 v, refer to the relevant section of the service information and test the battery and charging system
		Range change requested while the transmission oil temperature is lower than -30°C	Using Jaguar Land Rover approved diagnostic equipment, check datalogger signal - Transmission Temperature (0xFE00). Range change is available when the recorded transmission oil temperature is above -30°C NOTE: (Only one range change request per minute is available while the transmission oil temperature is between -30°C and 0°C. These restrictions do not apply once the transmission oil temperature is above 0°C)
		A second range change has been requested before the 60 second timer has expired following an initial range request made while the transmission oil temperature is between -30°C and 0°C	Using Jaguar Land Rover approved diagnostic equipment, check datalogger signal - Transmission Temperature (0xFE00). Retry range change request when the recorded transmission oil temperature is above 0°C
A range change is not initiated	Low Range Requested: Available When Stationary	Range change requested when conditions for change to low range are not satisfied	The vehicle must be stationary for low range change to be successfully initiated
A range change is not initiated	High Range Requested: Available Below	Range change requested when conditions for change to high range are not satisfied	Vehicle speed must be lower than 37mph/60kph for high range change to be successfully initiated
A range change is not initiated	37mph/60kph Low Range Requested: Select Neutral For Range Change	Range change requested when conditions for range change are not satisfied	The transmission must be in neutral for the range change to be successfully initiated
A range change is not initiated	High Range Requested: Select Neutral For Range Change
A range change is not initiated	-	Range change request signal not received by the TCCM	Using Jaguar Land Rover approved diagnostic equipment, check the Terrain Response Switchpack for related DTCs and refer to the relevant DTC index
Judder (shudder) (see definition below) during low speed maneuvering with high steering inputs (front and rear driveshafts rotating at different speeds)	-	NOTE: At full lock, there will be some tire scrubbing; as the temperature drops, scrubbing may be experienced as stick/slip judder (shudder). This is normal and does not require any service intervention Transfer case clutch not disengaged fully	Refer to the relevant section of the service information and check the transfer case fluid level/condition. Using JLR approved diagnostic equipment, perform routine - Transfer Case Oil Replacement (see details below)
Oil leaks from transfer case	-	Blocked or restricted breather pipe Physical damage to shaft seal flange/slinger components	Check the oil breather pipe for damage or restrictions and rectify as required Check for evidence of oil leaks from the front/rear shaft seals and replace oil seals as required