Circuit/System Verification

• If any other DTCs are set 

  Refer to:Diagnostic Trouble Code (DTC) List - Vehicle

• Go to next step: If no other DTCs are set 

Verify the scan tool parameter:Transmission OSS - The value should change smoothly and gradually as the vehicle speed is increased and decreased.

• If the value does not change smoothly and gradually 

  Refer to the appropriate diagnostic procedure listed below:

• { MQC } - Refer to:DTC P0721-P0723, P077C, P077D, P172A, or P172B

• Go to next step: If the value changes smoothly and gradually 

Verify the scan tool parameter:Vehicle Speed Sensor - The value should change smoothly and gradually as the vehicle speed is increased and decreased.

• If the value does not change smoothly and gradually 

  Refer to:DTC C0500-C0504, C0506-C0510, or C0512-C0516

• Go to next step: If the value changes smoothly and gradually 

• If the DTC sets 

1. Replace the component:K20 Engine Control Module
2. Program the ECM.
3. Operate the vehicle within the Conditions for Running the DTC.
4. Verify the DTC does not set.
   • If the DTC sets

     Mechanical Malfunction - Refer to:Transfer Case Disassemble

   • Go to next step: If no DTC is set

     Go to next step: All OK.

• Go to next step: If no DTC is set