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Circuit/System Testing

WARNING: This page is about a different car, the 2012 GMC Terrain and 2012 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:

You must perform the Circuit/System Verification before proceeding with Circuit/System Testing.

Forward Collision Alert System Malfunction

  1. Verify no DTCs are set. If any DTCs are set, diagnose those first. Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
  2. Ignition OFF, remove the ignition key, open the driver door and disconnect the scan tool, all vehicle systems OFF, this may take up to 2 min.
  3. Disconnect the harness connector at the K109 Frontview Camera Module.
  4. Connect a test lamp between the K109 Frontview Camera Module B+ circuit terminal 3 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, replace the K109 Frontview Camera Module.
  5. Test for less than 5 Ω between the ground circuit terminal 1 and ground.
    • If greater than the specified value, test the ground circuit for an open/high resistance. If the circuit tests normal, replace the K109 Frontview Camera Module.
  6. Test for infinite resistance between the forward collision alert switch signal circuit terminal 10 and ground with the forward collision alert switch not pressed.
    • If less than infinite resistance, test the switch signal circuit for a short to ground. If the circuit tests normal, replace the S70L Steering Wheel Controls Switch - Left.
  7. Test for 1.2-1.4 kΩ between the forward collision alert switch signal circuit terminal 10 and ground with the forward collision alert switch pressed.
    • If greater than the specified value, test the switch signal circuit for an open high resistance. If the circuit tests normal, replace the S70L Steering Wheel Controls Switch - Left.
  8. If all circuits test normal, replace the K109 Frontview Camera Module.
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