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Home >> GMC >> 2007 >> Acadia SLE, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 393 (Power Door Lock System And Release Systems) >> Diagnostic Information and Procedures >> DTC B3641 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2007 Cadillac XLR. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the rear compartment lid release/close switch.
  2. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal D and ground.
    • If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal and the B+ circuit fuse is open, test the signal circuit terminal A for a short to ground.
  3. Verify that a test lamp does not illuminate between the signal circuit terminal A and ground.
    • If the test lamp illuminates, test the signal circuit terminal A for a short to voltage. If the circuit tests normal, replace the FTC module.
  4. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal D and signal circuit terminal A.
    • If the test lamp does not illuminate, test the signal circuit terminal A for an open/high resistance. If the circuit tests normal, replace the FTC module.
  5. If all circuits test normal, test or replace the rear compartment lid release/close switch.
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