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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 490 (Hybrid/EV Control System) >> Diagnostic Information and Procedures >> DTC P0A3F, P0A40, P0C52, P0C53, P0C5C, P0C5D, or P1B03 >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2012 GMC Yukon, 2012 Chevrolet Tahoe, and 2012 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
  1. Verify that DTCs P1AF0, P1AF2, P1B43, P1B44, P1B0B, or P1B0C is not set.
  2. Ignition OFF, disconnect the X176 harness connector at the transmission.
  3. Install the DT-48493  jumper harness to the transmission side only.
  4. Test for 7.0-9.0 Ω between the AC terminal 8 and the AC terminal 9.
    • If not within the specified range, test the transmission control wiring harness extension harness circuits for a short to voltage, short to ground, or an open/high resistance. If the circuits test normal replace the M15A drive motor with generator assembly.
  5. Test for 20-23 Ω between the signal terminal 12 and the signal terminal 14.
    • If not within the specified range, test the transmission control wiring harness extension harness circuits for a short to voltage, short to ground, or an open/high resistance. If the circuits test normal replace the M15A drive motor with generator assembly.
  6. Test for 23-26 Ω between the signal terminal 10 and the signal terminal 11.
    • If not within the specified range, test the transmission control wiring harness extension harness circuits for a short to voltage, short to ground, or an open/high resistance. If the circuits test normal replace the M15A drive motor with generator assembly.
  7. Test for greater than 10, 000 Ω between the terminals listed below and ground:
    • Terminal 8
    • Terminal 9
    • Terminal 10
    • Terminal 11
    • Terminal 12
    • Terminal 14
    • If less than the specified value, test the transmission control wiring harness extension harness circuit for a short to ground. If the circuit tests normal replace the M15A drive motor with generator assembly.
  8. Test for infinite resistance between the terminals listed below:
    • Terminals 8 and 10
    • Terminals 8 and 12
    • Terminals 10 and 12
    • If less than the specified value, test the transmission control wiring harness extension harness circuits for a short between the circuits. If the circuits test normal replace the M15A drive motor with generator assembly.
  9. If the test passed refer to Circuit/System Testing.
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