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Home >> Chevrolet >> 2010 >> Traverse LS, AWD >> Repair and Diagnosis >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Object Detection System >> Diagnostic Information and Procedures >> DTC B138A >> Circuit/System Testing
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Circuit/System Testing

  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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