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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 >> Circuit/System Testing

Circuit/System Testing

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    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 4.8-5.2 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 probes J 35616-2A, test for 4.8-5.2 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 probes 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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