LEMON Manuals: Even more car manuals for everyone
Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 359 (Transfer Case - Mp 3010-NP0) >> Diagnostic Information and Procedures >> DTC C0398 >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2011 GMC Yukon XL, 2011 GMC Yukon, 2011 Chevrolet Tahoe, 2011 Chevrolet Suburban, and 2011 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:

Order of component testing is important.

1. Rotational Position Sensor (RPS)

  1. Rotational Position Sensor (RPS)
    1. Key OFF. Disconnect the RPS X1 connector. Remove the RPS. Inspect the mating surface for damage. Replace if damage is found.
    2. Rotate the RPS sensor tab to the lock position. Reconnect the RPS.
    3. Key ON, engine OFF.
    4. While monitoring the RPS parameter on the scan tool, push in the locking tab and rotate the RPS sensor tab. In the lock position the RPS parameter should read 25-45°. Upon rotating the RPS tab, the RPS parameter should display a sweep from -146 to +204 degrees.
      • If the RPS parameter does not display as described, replace the RPS.
    5. Using a wide, flat blade screwdriver in the RPS mounting slot, attempt to rotate the transfer case control actuator shaft. The shaft should not turn.
      • If the shaft can be turned, then internal damage has occurred to the transfer case control actuator shaft or mating gears. Refer to transfer case disassemble and inspection, and repair as necessary.
  2. Transfer Case Encoder Motor (TCEM) - Incremental Position Sensor
    1. Remove the TCEM from transfer case. Using a paint pen or marker, place indexing marks on the encoder motor drive gear and the mounting surface of the encoder motor.
    2. Attach the TCEM to the TCEM connector.
    3. Key ON, engine OFF.
      4. NOTE:

      Pressing the exit button on the scan tool between commanding the Transfer Case Motor Control forward and reverse is critical to proper diagnosis. Pressing the exit button changes the commanded state to NONE. If you DO NOT press the exit button between changing directions, the Incremental Position Sensor parameter may not update. When this happens you have to command the new direction a second time in order for the scan tool to update. Repeatedly changing directions may cause the Incremental Position Sensor parameter to flip extremes, -150° to +360° / +360° to -150°.

    4. While monitoring the Incremental Position Sensor parameter, command the TCEM forward using the Transfer Case Motor Control function of the scan tool. After 10 seconds the Incremental Position Sensor parameter should read -150° or +360°. Push the exit button on the scan tool once to return the commanded state to NONE. Command the TCEM reverse. After 10 seconds the Incremental Position Sensor should read +360° or -150°.
      • If the Incremental Position Sensor parameter does not display as described, repeat step 4. If the Incremental Position Sensor parameter continues to not display as described, replace the TCEM.
    5. Key OFF. Install the TCEM.
    6. Key OFF for at least 3 minutes.
    7. Key ON, engine OFF. The TCCM should relearn the TCEM position and the Transfer Case Position parameter should display a valid mode.
scientia non olet · About LEMON Manuals