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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 192 (Door Lock Systems & Door Handles) >> Diagnostic Information and Procedures >> DTC B3130 >> Circuit/System Testing

Circuit/System Testing

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  1. Ignition OFF, disconnect the X3 harness connector at the I/P fuse block.
  2. Connect a test lamp between the control circuit terminal A3 and B+.
  3. Ignition ON, command the doors to UNLOCK with a scan tool, the test lamp should illuminate during the UNLOCK command.
    • If the test lamp does not illuminate, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM.
    • If the test lamp continuously illuminates, test the control circuit for a short to ground. If the circuit tests normal, replace the BCM.
  4. If the circuit tests normal, replace the I/P fuse block.
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