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Home >> Cadillac >> 2017 >> CT6 Plug-In >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Pedestrian Protection System >> Diagnostic Information and Procedures >> DTC B009C or B00A0: Pedestrian Impact Detection Sensor >> Circuit/System Testing

Circuit/System Testing

  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 K36 Inflatable Restraint Sensing and Diagnostic 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 K36 Inflatable Restraint Sensing and Diagnostic Module.
    • If less than 10 Ω 
  3. Ignition ON.
  4. Test for less than 1 V between the signal circuit and ground.
    • If 1 V or greater 
    1. Ignition OFF. Disconnect the X2 harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module Ignition ON.
    2. Test for less than 1 V between the signal circuit and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V, replace the K36 Inflatable Restraint Sensing and Diagnostic Module.
    • If less than 1 V 
  5. Ignition OFF.
  6. Test for greater than 50 k Ω between the signal circuit and ground.
    • If 50 k Ω or less 
    1. Disconnect the X2 harness connector at the K36 Inflatable Restraint Sensing and Diagnostic 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 K36 Inflatable Restraint Sensing and Diagnostic Module.
    • If greater than 50 k Ω 
  7. Disconnect the X2 harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module.
  8. Test for less than 2 Ω between the Pedestrian Impact Detection Sensor signal circuit terminal 1 and the appropriate K36 Inflatable Restraint Sensing and Diagnostic Module signal circuit terminal listed below:
    • Right front impact sensor terminal 31 X2
    • Left front impact sensor terminal 52 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 K36 Inflatable Restraint Sensing and Diagnostic Module.
      • If the DTC does not set.
    3. All OK.
    • If the DTC does not set 
  12. All OK.
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