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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 502 (Transfer Case - Mp 3010 (NP0)) >> Diagnostic Information and Procedures >> DTC C0392 >> Transfer Case Shift Control Module (TCCM)

Transfer Case Shift Control Module (TCCM)

WARNING: This page is about a different car, the 2012 GMC Yukon XL, 2012 GMC Yukon, 2012 Chevrolet Tahoe, and 2012 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
  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 pin, 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 pin, 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 Testing.
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