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Home >> GMC >> 2018 >> Acadia Denali, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1 (Object Detection System And Pedestrian Protection System) >> Diagnostic Information and Procedures >> DTC B009C or B00A0: Pedestrian Impact Detection Sensor >> Circuit/System Testing
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Circuit/System Testing

WARNING: This page is about a different car, the 2016 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF. Disconnect the harness connector at the appropriate Pedestrian Impact Detection Sensor. It may take up to 2 minutes for all vehicle systems to power down.
  2. Test for less than 10 Ω between the low reference circuit terminal 2 and ground.
    • If 10 Ω or greater 
    1. Disconnect the X2 harness connector at the K42 Pedestrian Impact Detection Control Module.
    2. Test for less than 2 Ω in the low reference circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the K42 Pedestrian Impact Detection Control Module.
    • If less than 10 Ω 
  3. Ignition ON.
  4. Test for less than 1 V between the signal circuit terminal 1 and ground.
    • If 1 V or greater 
    1. Ignition OFF. Disconnect the X2 harness connector at the K42 Pedestrian Impact Detection Control Module Ignition ON.
    2. Test for less than 1 V between the signal circuit terminal 1 and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V, replace the K42 Pedestrian Impact Detection Control Module.
    • If less than 1 V 
  5. Ignition OFF.
  6. Test for greater than 50k Ω between the signal circuit terminal 1 and ground.
    • If 50k Ω or less 
    1. Disconnect the X2 harness connector at the K42 Pedestrian Impact Detection Control Module.
    2. Test for infinite resistance between the signal circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the K42 Pedestrian Impact Detection Control Module.
    • If greater than 50k Ω 
  7. Disconnect the X2 harness connector at the K42 Pedestrian Impact Detection Control Module.
  8. Test for less than 2 Ω between the Pedestrian Impact Detection Sensor signal circuit terminal 1 and the appropriate K42 Pedestrian Impact Detection Control Module signal circuit terminal listed below:
    • Right front impact sensor terminal 22 X2
    • Left front impact sensor terminal 23 X2
    • If 2 Ω or greater 

      Repair the short to voltage or an open/high resistance in the circuit.

    • If less than 2 Ω 
  9. Ignition OFF, reconnect all harness connectors.
  10. Ignition ON, clear DTCs. Operate the vehicle within the Conditions for Running the DTC.
  11. Verify DTC B009C or B00A0 does not set.
    • If the DTC sets 
    1. Replace the B82F Pedestrian Impact Detection Sensor - Upper Beam Front.
    2. Verify the DTC does not set.
      • If the DTC sets, replace the K42 Pedestrian Impact Detection Control Module.
      • If the DTC does not set.
    3. All OK.
    • If the DTC does not set 
  12. All OK.
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