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Tahoe / Yukon Service Manual

DTC C05DD (1)

DTC C05DD Diagnostic Instructions Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions DTC Descriptor DTC C05DD 4WD/AWD Clutch Performance Symptom Byte Information: Symptom Byte List. Circuit/System Description For an overview of the component/system, refer to: Transfer Case Description and Operation Conditions for Running the DTC C05DD 54, C05DD F3 Ignition = On System Voltage = 9 to 17.5 V C05DD 98 Ignition = On System Voltage = 9 to 17.5 V Wheel Speed Signal = Valid C05DD 67 Ignition = On System Voltage = 9 to 17.5 V Transfer Case Clutch Torque = Enabled C05DD F4 Ignition = On System Voltage = 9 to 17.5 V Range Actuator Position Sensor — Signal = Valid Conditions for Setting the DTC C05DD 54 Calibration/Software = Not Learned — 20 times . C05DD 98 Calculated Clutch Temperature = Greater than a predefined threshold C05DD 67 Condition 1 Transfer Case Clutch Torque = Enabled Torque Error — 10 times For 10 consecutive events. Condition 2 Transfer Case Clutch Torque = Enabled Torque Error — 10 times Wheel Slip Status = Greater than a predefined threshold C05DD F3 Transfer Case Clutch = Worn C05DD F4 Condition 1 Range Actuator Position Sensor = Maximum Travel Exceeded — 170 degrees The above condition(s) must occur 10 times. Condition 2 Transfer Case Range Position Sensor = Maximum Travel Exceeded — 170 degrees The above condition(s) must occur 10 times. Actions Taken When the DTC Sets C05DD 54 Transfer Case Clutch Torque — Maximum Shifting = Enabled Driver Information Display = Service 4WD C05DD 98 4WD High/Locked = Transfer Case Clutch Torque — Disabled 4WD Low = Transfer Case Clutch Torque — Reduced Front Axle = Disengaged Driver Information Display = Service 4WD C05DD 67 Shifting = Enabled Transfer Case Clutch Torque — Reduced Driver Information Display = Service 4WD C05DD F3 Shifting = Disabled Front Axle = Disengaged Driver Information Display = Service 4WD C05DD F4 Transfer Case Clutch Torque — Reduced /Disabled Driver Information Display = Service 4WD Conditions for Clearing the DTC The conditions for setting the DTC no longer exist. Perform the scan tool learn/reset function: Range Actuator Learn Refer to: Transfer Case Range Actuator Learn A history DTC will clear after 40 consecutive malfunction-free ignition cycles. Reference Information Schematic Reference Transfer Case Control Schematics Connector End View Reference Master Electrical Component List Electrical Information Reference Circuit Testing Connector Repairs Testing for Intermittent Conditions and Poor Connections Wiring Repairs Scan Tool Reference Control Module References Circuit/System Verification

  1. Ignition » On / Vehicle » In Service Mode
  2. Verify there are no other DTCs set, except for DTC C05DD. ⇒ If any other DTCs are set Diagnose other DTCs first. ⇓ If no other DTCs are set
  3. Operate the vehicle within the Conditions for Running the DTC. Verify the following parameters are within 1.6 km/h (1 MPH) of each other: Electronic Brake Control Module - Left Front Wheel Speed Signal Electronic Brake Control Module - Right Front Wheel Speed Signal Electronic Brake Control Module - Left Rear Wheel Speed Signal Electronic Brake Control Module - Right Rear Wheel Speed Signal ⇒ If not within 1.6 km/h (1 MPH) of each other Refer to: DTC C0500-C0504, C0506-C0510, or C0512-C0516 ⇓ If within 1.6 km/h (1 MPH) of each other
  4. Perform the scan tool learn/reset function: Range Actuator Learn Refer to: Transfer Case Range Actuator Learn
  5. Verify DTC C05DD is not set. ⇒ If the DTC sets Mechanical Condition — Transfer Case Clutch Pack Assembly Refer to: Transfer Case Disassemble ⇓ If the DTC is not set
  6. Operate the vehicle within the Conditions for Running the DTC.
  7. Verify DTC C05DD is not set. ⇒ If the DTC sets Mechanical Condition — Transfer Case Clutch Pack Assembly Refer to: Transfer Case Disassemble ⇓ If the DTC is not set
  8. All OK. Repair Instructions Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair Verification