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Home >> GMC >> 2013 >> Sierra 1500 Denali, AWD >> Repair and Diagnosis >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Object Detection System - Park Assist System >> Diagnostic Information and Procedures >> DTC B0968 >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the I/P multifunction switch.
  2. Ignition ON, verify a test lamp illuminates between the ignition circuit terminal 6 and ground.
    • If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.
  3. Ignition OFF, connect the harness connector at the I/P multifunction switch. Disconnect the X2 harness connector at the rear object sensor control module.
  4. Ignition ON, verify the park assist disable LED is not illuminated.
    • If the LED is illuminated, test the control circuit for a short to ground. If the circuit tests normal, test or replace the I/P multifunction switch.
  5. Install a 10 A fused jumper wire between the control circuit terminal 3 and ground. Verify the park assist disable LED is illuminated.
    • If the LED is not illuminated, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, test or replace the I/P multifunction switch.
  6. If all circuits test normal, replace the rear object sensor control module.
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