DIAGNOSTIC TROUBLE CODES: TRANSFER CASE MOTOR
Contents
1. 4WD Failure Description DTC C0374 will be set when the Transfer Case Control Module TCCM detects rear wheel slippage Once the TCCM attempts to apply torque to the front wheels and cannot DTC C0374 will be set When DTC C0374 is activated you will not be able to use your AUTO 4WD The SERVICE 4WD light will remain on until you re start your vehicle What causes DTC C0374 DTC C0374 will set when the Transfer Case Control Module detects a variation in the front drive shaft and rear drive shaft speed sensor and is not able to engage the front differential after ten 10 unsuccessful attempts How to access the diagnostic trouble code DTC Once there has been a DTC set the vehicle will either set a Service 4WD light or the lights on the 4x4 switch will flash and or stay lit To access the DTCs you will need to hook up a vehicle diagnostic scanner utilizing the service port under the driver side portion of the dash Disclaimer Even though every attempt is made to ensure this information is complete and accurate it is impossible to account for all possible circumstances or situations Please consult with a qualified auto technician before attempting to perform any work you are not qualified to do Automobiles can be hazardous to work on be sure to take all necessary safety precautions Failure to do so may result in property damage or personal injury Certain motor vehicle standards and performance requirements may apply to2. Ahard DTC will clear once the vehicle has run through one hundred 100 start cycles and detects no faults 3 To clear the DTC manually you will need a vehicle diagnostic scanner Scan tool Once the DTC has been erased go back into the vehicle system and verify that the DTC has been erased and that the system is performing properly Disclaimer Even though every attempt is made to ensure this information is complete and accurate it is impossible to account for all possible circumstances or situations Please consult with a qualified auto technician before attempting to perform any work you are not qualified to do Automobiles can be hazardous to work on be sure to take all necessary safety precautions Failure to do so may result in property damage or personal injury Certain motor vehicle standards and performance requirements may apply to your motor vehicle such as Federal Motor Vehicle Safety Standards by the National Highway Traffic Safety Administration Be sure that your work is performed in accordance with such standards and that you do not disable any motor vehicle safety feature 2012 Dorman Products Inc No reproductions in whole or in part without prior written approval A 600 910 DANETICTROBLECOES TRANSFER CASEMOTOR ATTENTION Refer to the appropriate shop manual for your vehicle to obtain specific service procedures for this part If you do not have a service manual or lack the skill to install this part it is recommende
3. Failure to do so may result in property damage or personal injury Certain motor vehicle standards and performance requirements may apply to your motor vehicle such as Federal Motor Vehicle Safety Standards by the National Highway Traffic Safety Administration Be sure that your work is performed in accordance with such standards and that you do not disable any motor vehicle safety feature 2012 Dorman Products Inc No reproductions in whole or in part without prior written approval 600 910 DIAGNOSTIC TROUBLE CODES TRANSFER CASEMOTOR ATTENTION Refer to the appropriate shop manual for your vehicle to obtain specific service procedures for this part If you do not have a service manual or lack the skill to install this part it is recommended that you seek the services of a qualified technician Pay special attention to all cautions and warnings included in the shop manual Read and follow all instructions carefully When to clear a DTC The diagnostic trouble code DTC should only be erased once the voltage concern has been corrected or the mechanical problem has been addressed How to clear a DTC 1 The Transfer Case Control Module TCCM will clear the DTC once the initial problem has been fixed 2 A hard DTC will clear once the vehicle has run through one hundred 100 start cycles and detects no faults 3 To clear the DTC manually you will need a vehicle diagnostic scanner Scan tool Once the DTC has been er
4. though every attempt is made to ensure this information is complete and accurate it is impossible to account for all possible circumstances or situations Please consult with a qualified auto technician before attempting to perform any work you are not qualified to do Automobiles can be hazardous to work on be sure to take all necessary safety precautions Failure to do so may result in property damage or personal injury Certain motor vehicle standards and performance requirements may apply to your motor vehicle such as Federal Motor Vehicle Safety Standards by the National Highway Traffic Safety Administration Be sure that your work is performed in accordance with such standards and that you do not disable any motor vehicle safety feature 2012 Dorman Products Inc No reproductions in whole or in part without prior written approval
5. A 600 910 DANETICTROBLECOES TRANSFER CASEMOTOR ATTENTION Refer to the appropriate shop manual for your vehicle to obtain specific service procedures for this part If you do not have a service manual or lack the skill to install this part it is recommended that you seek the services of a qualified technician Pay special attention to all cautions and warnings included in the shop manual Read and follow all instructions carefully 2007 03 Silverado 1500 Sierra 1500 Tahoe Yukon Yukon XL 1500 2007 03 Silverado 2500 Sierra 2500 Yukon XL 2007 03 Avalanche DTC C0306 Motor A or B Circuit Failure Description Diagnostic Trouble Code C0306 is set once the Transfer Case Control Module detects an open short to ground or low voltage in the Motor Control A or B circuit or an open or short to ground fault inside of the transfer case motor How to access the diagnostic trouble code DTC Once there has been a DIC set the vehicle will either set a service soon light or the lights on the 4x4 switch will flash and or stay lit To access the DTCs you will need to hook up a vehicle diagnostic scanner utilizing the service port under the driver side portion of the dash When to clear a DTC The diagnostic trouble code DTC should only be erased once the positive voltage concern has been corrected How to clear a DTC 1 The Transfer Case Control Module TCCM will clear the DTC once the initial problem has been fixed 2
6. ased go back into the vehicle system and verify that the DTC has been erased and that the system is performing properly Disclaimer Even though every attempt is made to ensure this information is complete and accurate it is impossible to account for all possible circumstances or situations Please consult with a qualified auto technician before attempting to perform any work you are not qualified to do Automobiles can be hazardous to work on be sure to take all necessary safety precautions Failure to do so may result in property damage or personal injury Certain motor vehicle standards and performance requirements may apply to your motor vehicle such as Federal Motor Vehicle Safety Standards by the National Highway Traffic Safety Administration Be sure that your work is performed in accordance with such standards and that you do not disable any motor vehicle safety feature 2012 Dorman Products Inc No reproductions in whole or in part without prior written approval Os 600 910 DO AGNOSTIC TROUBLE CODES TRANSFER CASE MOTOR ATTENTION Refer to the appropriate shop manual for your vehicle to obtain specific service procedures for this part If you do not have a service manual or lack the skill to install this part it is recommended that you seek the services of a qualified technician Pay special attention to all cautions and warnings included in the shop manual Read and follow all instructions carefully DTC C0374 General
7. d that you seek the services of a qualified technician Pay special attention to all cautions and warnings included in the shop manual Read and follow all instructions carefully DTC C0321 Motor A or B Circuit Failure Description DTC C0321 will be set when the Transfer Case Control Module TCCM finds a fault in an open lock solenoid open motor lock control or an open motor feed This will cause the 4WD to be disabled and will turn on the Service 4WD trouble light What causes DTC C0321 1 The transfer case motor lock feature detects the improper voltage 2 The Transfer Case Control Module TCCM detects no voltage going to the Transfer Case Motor TCM lock feature How to access the diagnostic trouble code DTC Once there has been a DTC set the vehicle will either set a Service 4WD light or the lights on the 4x4 switch will flash and or stay lit To access the DTCs you will need to hook up a vehicle diagnostic scanner utilizing the service port under the driver side portion of the dash When to clear a DTC The diagnostic trouble code DTC should only be erased once the voltage concern has been corrected How to clear a DTC 1 The Transfer Case Control Module TCCM will clear the DTC once the initial problem has been fixed 2 Ahard DTC will clear once the vehicle has run through one hundred 100 start cycles and detects no faults 3 To clear the DTC manually you will need a vehicle diag
8. nostic scanner Scan tool Once the DTC has been erased go back into the vehicle system and verify that the DTC has been erased and that the system is performing properly Disclaimer Even though every attempt is made to ensure this information is complete and accurate it is impossible to account for all possible circumstances or situations Please consult with a qualified auto technician before attempting to perform any work you are not qualified to do Automobiles can be hazardous to work on be sure to take all necessary safety precautions Failure to do so may result in property damage or personal injury Certain motor vehicle standards and performance requirements may apply to your motor vehicle such as Federal Motor Vehicle Safety Standards by the National Highway Traffic Safety Administration Be sure that your work is performed in accordance with such standards and that you do not disable any motor vehicle safety feature 2012 Dorman Products Inc No reproductions in whole or in part without prior written approval Os 600 910 D AGNOSTIC TROUBLE CODES TRANSFER CASE MOTOR ATTENTION Refer to the appropriate shop manual for your vehicle to obtain specific service procedures for this part If you do not have a service manual or lack the skill to install this part it is recommended that you seek the services of a qualified technician Pay special attention to all cautions and warnings included in the shop manual Read and follow all inst
9. ructions carefully DTC C0327 Motor A or B Circuit Failure Description DTC C0327 will be set when the Transfer Case Control Module TCCM finds an electrical fault in the Transfer Case Encoder Circuit What causes DTC C0327 DTC C0327 will set when the Transfer Case Control Module detects a variation in the specified voltage for the Transfer Case Encoder circuit Another possible cause for DTC C0327 could be a mechanical concern within the Transfer Case Shift assembly The Transfer Case encoder detects the position of the shift shaft assembly on the Transfer Case Over time the shift shaft assembly could develop lateral or vertical movement and cause the Transfer Case Encoder to detect a false reading setting a trouble code How to access the diagnostic trouble code DTC Once there has been a DTC set the vehicle will either set a Service 4WD light or the lights on the 4x4 switch will flash and or stay lit To access the DTCs you will need to hook up a vehicle diagnostic scanner utilizing the service port under the driver side portion of the dash Disclaimer Even though every attempt is made to ensure this information is complete and accurate it is impossible to account for all possible circumstances or situations Please consult with a qualified auto technician before attempting to perform any work you are not qualified to do Automobiles can be hazardous to work on be sure to take all necessary safety precautions
10. your motor vehicle such as Federal Motor Vehicle Safety Standards by the National Highway Traffic Safety Administration Be sure that your work is performed in accordance with such standards and that you do not disable any motor vehicle safety feature 2012 Dorman Products Inc No reproductions in whole or in part without prior written approval 600 910 DIAGNOSTIC TROUBLE CODES TRANSFER CASEMOTOR ATTENTION Refer to the appropriate shop manual for your vehicle to obtain specific service procedures for this part If you do not have a service manual or lack the skill to install this part it is recommended that you seek the services of a qualified technician Pay special attention to all cautions and warnings included in the shop manual Read and follow all instructions carefully When to clear a DTC The diagnostic trouble code DTC should only be erased once the voltage concern has been corrected or the mechanical problem has been addressed How to clear a DTC 1 The Transfer Case Control Module TCCM will clear the DTC once the initial problem has been fixed 2 A hard DTC will clear once the vehicle has run through one hundred 100 start cycles and detects no faults 3 To clear the DTC manually you will need a vehicle diagnostic scanner Scan tool Once the DTC has been erased go back into the vehicle system and verify that the DTC has been erased and that the system is performing properly Disclaimer Even
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