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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 >> Circuit/System Testing

Circuit/System Testing

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.
    NOTE:

    When test probing harness terminals, it is imperative to use the proper test probe from the most current version of the J 35616  Kit. Use of an improper test probe may deform the terminal, resulting in intermittent open conditions.

  1. Key OFF. Disconnect the X1 connector from the transfer case two/four wheel drive actuator position sensor also known as the rotational position sensor (RPS).
  2. Key ON, engine OFF.
  3. Using the GY probe J 35616-2A, test for 4.75-5.25 V between the 5-volt reference circuit, RPS X1 pin B and a good ground (the ground terminal of the EL-49742  harness, black terminal).
    • If the voltage is less than the specified range, test the affected circuit for an open/high resistance or short to ground. If all circuits and connections test normal, test the TCCM for proper operation.
    • If the voltage is greater than the specified range, test the affected circuit for a short to voltage. If all circuits and connections test normal, test the TCCM for proper operation.
  4. Using the GY probe J 35616-2A, test for 4.75-5.25 V between the 5-volt reference circuit, RPS X1 pin B and the low reference circuit, RPS X1 pin A.
    • If the voltage is less than the specified range, test the low reference circuit for an open/high resistance. If all circuits and connections test normal, test the TCCM for proper operation.
    • If the voltage is greater than the specified range, test the low reference circuit for a short to voltage. If all circuits and connections test normal, test the TCCM for proper operation.
  5. Using the GY probe J 35616-2A, test for 4.5-5.0 V between the rotary position sensor signal circuit, RPS X1 pin C and a good ground.
    • If the voltage is less than the specified range, test the rotary position sensor signal circuit for an open/high resistance or short to ground. If all circuits and connections test normal, test the TCCM for proper operation.
    • If the voltage is greater than the specified range, test the rotary position sensor. signal circuit for a short to voltage. If all circuits and connections test normal, test the TCCM for proper operation.
  6. Using the GY probe J 35616-2A, test for greater than 500 Ω between the low reference circuit, RPS X1 pin A and all other pins of the RPS X1.
    • If the resistance is less than the specified range, test the affected circuits for a shorted together condition. If all circuits and connections test normal, test the TCCM for proper operation.
  7. Using the GY probe J 35616-2A, test for greater than 500 Ω between the 5-volt reference circuit, RPS X1 pin B and all other pins of the RPS X1.
    • If the resistance is less than the specified range, test the affected circuits for a shorted together condition. If all circuits and connections test normal, test the TCCM for proper operation.
  8. Key OFF. Disconnect TCCM connector X2.
  9. Using the GY probe J 35616-2A, test for greater than 10 Ω between the low reference circuit, TCSCS X2 pin 9 and all other pins of the TCCM X2.
    • If the resistance is less than the specified range, test the affected circuits for a shorted together condition. If all circuits and connections test normal, test the TCCM for proper operation.
  10. Using the GY probe J 35616-2A, test for greater than 10 Ω between the rotational position sensor circuit, TCSCS X2 pin 11 and all other pins of the TCCM X2.
    • If the resistance is less than the specified range, test the affected circuits for a shorted together condition. If all circuits and connections test normal, test the TCCM for proper operation.
  11. Test the RPS for proper operation.
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