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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 338 (Transfer Case - Mp 3023/3024-NQH) >> Diagnostic Information and Procedures >> DTC C0392 >> Component Testing

Component Testing

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RPS

  1. Key OFF. Disconnect the X1 connector at the RPS.
  2. Remove the RPS from the transfer case.
  3. Connect the RPS.
  4. While monitoring the Rotational Position Sensor parameter in the Data Display section of the scan tool, rotate the center locating tab of the RPS. The Rotational Position Sensor parameter reading should sweep between -146 and +204 degrees.
    • If the RPS does not function as explained, replace the RPS.

TCCM

  1. Key OFF. Disconnect the X1 connector.
  2. Key ON, engine OFF. Connect the EL-49742  harness.
  3. Test for 4.5-5.5 V between the TCCM 5-volt reference pin, TCCM X1 pin 4, and the ground terminal of the EL-49742  harness, black terminal.
    • If the outside the specified range, replace TCCM.
  4. Key OFF.
  5. Connect the TCCM X1 connector. Disconnect the TCCM X2 connector.
  6. Key ON, engine OFF.
  7. Test for B+ (+0.0/-1.0 V) between the TCCM low reference circuit, TCCM X2 pin 9, and the B+ terminal of the EL-49742  harness, red terminal.
    • If the outside the specified range, replace TCCM.
  8. Test for B+ (+0.0/-1.0 V) between the TCCM rotational position sensor circuit, TCCM X2 pin 11, and the B+ terminal of the EL-49742  harness, red terminal.
    • If the outside the specified range, replace TCCM.
  9. Go to Circuit/System Verification .
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