Symptom Chart

SYMPTOM	POSSIBLE CAUSES	ACTION
No drive to the front and rear wheels	Front/rear driveshaft failure/disconnected Front/center/rear differential failure Front/rear left/right halfshaft failure/disconnected Transfer case system failure Transfer case in Neutral Transfer case calibration failure	Check the integrity of the front and rear driveshafts Check the integrity of the front, center and rear differentials Check the integrity of the halfshafts Using the manufacturer approved diagnostic system, check the transfer case control module for related DTCs and refer to the relevant DTC index GO to Pinpoint Test B . Using the manufacturer approved diagnostic system, perform routine - Transfer Case Replacement
No drive to the front axle	Transfer case clutch worn/burnt	Check the integrity of the driveshafts, differentials and halfshafts. Rectify as necessary. Check the vehicle history for driveline failures. If a driveline failure has occurred, drain and refill the transfer case fluid, and perform routine - Transfer Case Replacement. Clear the DTCs and re-test. If the fault persists, GO to Pinpoint Test C .
No drive to the front and rear wheels - Automatic transmission gear selection operating correctly	Transfer case calibration failure Transfer case solenoid circuit short circuit to ground, short circuit to power, open circuit, high resistance Transfer case actuator position sensor signal A circuit short circuit to ground, short circuit to power, open circuit, high resistance Transfer case actuator position sensor signal B circuit short circuit to ground, short circuit to power, open circuit, high resistance Transfer case actuator circuit short circuit to ground, short circuit to power, open circuit, high resistance Transfer case range change mechanism obstructed Transfer case range change mechanism not calibrated correctly Transfer case control module power or ground circuit open circuit, high resistance Battery/charging system fault	Using the manufacturer approved diagnostic system, check the transfer case control module for related DTCs and refer to the relevant DTC index. Check if the range change actuator is audible during operation. GO to Pinpoint Test B . Clear the DTCs and retest GO to Pinpoint Test E . GO to Pinpoint Test G . GO to Pinpoint Test H . GO to Pinpoint Test D . Using the manufacturer approved diagnostic system, check the transfer case control module for related DTCs and refer to the relevant DTC index. Check if the range change actuator is audible during operation. GO to Pinpoint Test B . Using the manufacturer approved diagnostic system, perform routine - Transfer Case Replacement. Check the transfer case control module for related DTCs and refer to the relevant DTC index. GO to Pinpoint Test B . Refer to the appropriate system wiring diagrams and check the transfer case control module power and ground circuits for open circuit, high resistance. Repair the wiring harness as necessary Refer to the relevant service information and check the battery and charging system
Range change inoperative	Transfer case system fault Transfer case requires calibration (after installing a new component) Transfer case too cold Transfer case control module internal temperature above threshold Transfer case range change mechanism obstructed Automatic transmission drag torque excessively high Transfer case control module power or ground circuit open circuit, high resistance Battery/charging system fault	NOTE: Transfer case range changes are inhibited when the transfer case actuator temperature is above 100°C or below -30° C. Only one transfer case range change per minute is permitted when the transfer case actuator temperature is between -30°C and 0° C. Transfer case range changes are inhibited when the transfer case control module internal temperature is above 100°C. Using the manufacturer approved diagnostic system, check the transfer case control module for related DTCs and refer to the relevant DTC index Using the manufacturer approved diagnostic system, perform routine - Transfer Case Replacement Drive the vehicle to warm the transfer case and retest. Using the manufacturer approved diagnostic system, check datalogger signal - Motor Temperature (0xD11C) Using the manufacturer approved diagnostic system, check datalogger signals - ECU Internal Temperature (0xD117) - and - Motor Temperature (0xD11C) - and - Motor Over Temperature Events (0xD11F) Using the manufacturer approved diagnostic system, perform routine - Transfer Case Replacement. If the routine fails, check if the range change actuator is audible during operation. GO to Pinpoint Test B . GO to Pinpoint Test I . Refer to the appropriate system wiring diagrams and check the transfer case control module power and ground circuits for open circuit, high resistance. Repair the wiring harness as necessary Refer to the relevant service information and check the battery and charging system
Range change, high range to low range, inhibited when the vehicle is moving	Shifting to low range when the vehicle is moving is not possible from 2013 model year	No action necessary
Off road traction reduced and warning message: TRANSMISSION OVERHEAT SLOW DOWN	Center differential temperature is approaching the overheat threshold Transfer case fluid level low	NOTE: This warning message may be induced by prolonged off road driving. Using the manufacturer approved diagnostic system, check the transfer case control module for related DTCs and refer to the relevant DTC index. Check datalogger signals - ECU Internal Temperature (0xD117) - and - Motor Temperature (0xD11C) - and - Motor Over Temperature Events (0xD11F) Check the transfer case for fluid leaks. Refer to the relevant service information and check the transfer case fluid level
Off road traction reduced and warning message: TRANSMISSION FAULT - TRACTION REDUCED	Center differential clutch has failed - Operating as an open differential Transfer case control module has stopped transmitting on the CAN bus and defaults to open center differential	Using the manufacturer approved diagnostic system, check the transfer case control module for related DTCs and refer to the relevant DTC index Using the manufacturer approved diagnostic system, perform a CAN network integrity test. Refer to the appropriate system wiring diagrams and check the high speed CAN bus circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair the wiring harness as necessary
Judder during low speed maneuvering with high steering inputs	Excessive difference in tire circumference due to incorrect size, incorrect pressure or wear Transfer case fluid degraded Transfer case control module is not configured correctly Transfer case requires calibration (after installing a new component) Transfer case clutch not disengaged fully due to water contamination of the transfer case fluid Front/rear left/right halfshaft failure/disconnected Rear differential clutch not disengaged fully due to water contamination of the rear differential fluid (active differential)	Check the tire sizes, pressures and condition Refer to the relevant service information and drain the transfer case fluid. Flush the transfer case with new fluid and re-fill Using the manufacturer approved diagnostic system, re-configure the transfer case control module with the latest level software GO to Pinpoint Test C . GO to Pinpoint Test A . Check the integrity of the halfshafts Refer to the relevant service information and check the rear differential fluid level/condition
Excessively loud clunk during transfer case range change	Transfer case requires calibration (after installing a new component) Transfer case control module is not configured correctly	NOTE: During a transfer case range change, a mechanical noise may be audible. This is normal and does not indicate a fault. Using the manufacturer approved diagnostic system, perform routine - Transfer Case Replacement. Check the transfer case control module for related DTCs and refer to the relevant DTC index. If the fault persists, GO to Pinpoint Test C . Using the manufacturer approved diagnostic system, re-configure the transfer case control module with the latest level software
Excessively loud clunk when ignition is set to off (transfer case cycles to rest position)	Transfer case requires calibration (after installing a new component) Transfer case control module is not configured correctly Transfer case clutch worn/burnt	NOTE: During a transfer case range change, a mechanical noise may be audible. This is normal and does not indicate a fault. Using the manufacturer approved diagnostic system, perform routine - Transfer Case Replacement. Check the transfer case control module for related DTCs and refer to the relevant DTC index Using the manufacturer approved diagnostic system, re-configure the transfer case control module with the latest level software GO to Pinpoint Test C .
Whining noise	Transfer case bearing/chain wear	Using the manufacturer approved diagnostic system, perform routine - In-line diagnostic unit 2 noise, vibration and harshness diagnostic test - transfer case Refer to the relevant service information and install a new transfer case chain Refer to the relevant service information and install a new transfer case rear output shaft bearing
Transfer case fluid burnt (darker color than normal)	Excessive off-road driving Transfer case clutch worn/burnt Electric rear differential fault	NOTE: Some small particles may be present in the transfer case fluid. This is normal and does not indicate a fault. Refer to the relevant service information and drain and refill the transfer case fluid. Using the manufacturer approved diagnostic system, perform routine - Transfer Case Replacement. Check the transfer case control module for related DTCs and refer to the relevant DTC index Check the integrity of the driveshafts, differentials and halfshafts. Rectify as necessary. Check the vehicle history for driveline failures. If a driveline failure has occurred, drain and refill the transfer case fluid, and perform routine - Transfer Case Replacement. Clear the DTCs and re-test. If the fault persists, GO to Pinpoint Test C . Using the manufacturer approved diagnostic system, check the rear differential control module for related DTCs and refer to the relevant DTC index
Vibration through the steering wheel, front seat or floor at between 2400 and 2800 rpm during medium to heavy acceleration	Transfer case is torsioning/twisting on the rear of the transmission	NOTE: This Action applies to 5.0L petrol vehicles only. Install a mass damper (part number IAI500100) to the vacant threaded hole in the transfer case. Torque the fixing (part number IYP500080) to 75Nm
Fluid leak	Transfer case breather pipe blocked Input shaft seal failure Front output shaft seal failure Rear output shaft seal failure Actuator seal failure Solenoid seal failure Mating face seal failure	Check the transfer case breather pipe for blockages Install a new input shaft seal Install a new front output shaft seal Install a new rear output shaft seal Install a new actuator seal Install a new solenoid seal Re-seal the transfer case mating faces
Transfer Case Replacement routine fails repeatedly	Transfer case clutch worn/burnt Automatic transmission drag torque excessively high Transfer case control module power or ground circuit open circuit, high resistance Battery/charging system fault	Check the integrity of the driveshafts, differentials and halfshafts. Rectify as necessary. Check the vehicle history for driveline failures. If a driveline failure has occurred, GO to Pinpoint Test C . GO to Pinpoint Test I . Refer to the appropriate system wiring diagrams and check the transfer case control module power and ground circuits for open circuit, high resistance. Repair the wiring harness as necessary Refer to the relevant service information and check the battery and charging system
Actuator temperature sensor DTC set	Actuator temperature sensor circuit short circuit to ground, short circuit to power, open circuit, high resistance	GO to Pinpoint Test F .
Vibration from the transfer case	Installation of incorrect front/rear drive units	Refer to REAR DRIVE AXLE/DIFFERENTIAL -- LR4/L319 and FRONT DRIVE AXLE/DIFFERENTIAL -- LR4/L319 for further guidance on how to diagnose and rectify this issue.