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Home >> Buick >> 2009 >> Enclave CX, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 49 (Object Detection System) >> Diagnostic Information and Procedures >> DTC B138A >> Circuit/System Testing
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Circuit/System Testing

WARNING: This page is about a different car, the 2010 Saturn Outlook, 2010 GMC Acadia, 2010 Chevrolet Traverse, and 2010 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at each of the object alarm sensors.
  2. Ignition ON, verify DTC B138A is not set as current.
    • If the DTC is set, test the 8 V reference circuit terminal 1 for a short to voltage, short to ground, or an open/high resistance. If circuit tests normal, replace the object alarm module.
  3. Install each object alarm sensor harness connector one at a time, checking DTCs after each sensor is connected. Verify DTC B138A is not set as current.
    • If the DTC is set, replace the object alarm sensor that was connected immediately before the DTC set.
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