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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 B009A or B00A1: Hood Deployment Loop Short to Battery >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector listed below at the appropriate actuator:
    • F100L Hood Hinge Actuator - Left connector
    • F125 Hood Latch Actuator
  2. Test for greater than 25 Ω between the control circuit terminal 1 and the control circuit terminal 2.
    • If 25 Ω or less 
    1. Disconnect the X1 harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module.
    2. Test for infinite resistance between the two control circuits.
      NOTE: Some connectors may be equipped with shorting bars as a safety component to prevent accidental deployment. When testing on a connector with shorting bars, the shorting bars must be disabled to ensure accurate test results. Insert an appropriate pick from EL-38125-580 and depress the shorting bars above the appropriate terminals. This will lift the shorting bar from the terminal and allow accurate test results. Take care not to damage the connector, shorting bar or terminal when depressing the shorting bar.
      • If less than infinite resistance, repair the short between the two circuits.
      • If infinite resistance, replace the K36 Inflatable Restraint Sensing and Diagnostic Module.
    • If greater than 25 Ω 
  3. Ignition ON.
  4. Test for less than 11 V between the following control circuits and ground:
    • Control circuit terminal 1
    • Control circuit terminal 2
    • If 11 V or greater 
    1. Ignition OFF, disconnect the X1 harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module, ignition ON.
    2. Test for less than 1 V between the appropriate control 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 11 V 
  5. Ignition OFF.
  6. Test for greater than 25 Ω resistance between each control circuit terminal listed below and ground:
    • Control circuit terminal 1
    • Control circuit terminal 2
    • If 25 Ω or less 
    1. Disconnect the X1 harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module.
    2. Test for infinite resistance between the appropriate control circuit and ground.
      NOTE: Some connectors may be equipped with shorting bars as a safety component to prevent accidental deployment. When testing on a connector with shorting bars, the shorting bars must be disabled to ensure accurate test results. Insert an appropriate pick from EL-38125-580 and depress the shorting bars above the appropriate terminals. This will lift the shorting bar from the terminal and allow accurate test results. Take care not to damage the connector, shorting bar or terminal when depressing the shorting bar.
      • 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 25 Ω 
  7. Install a 3 A fused jumper wire between the control circuit terminals 1 and 2. Ignition ON.
  8. Verify the appropriate scan tool Hood Hinge Deployment Loop Resistance parameter is less than 2 Ω.
    • If 2 Ω or greater 
    1. Ignition OFF. Disconnect the X2 harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module.
    2. Test for less than 2 Ω in each control 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 2 Ω 
  9. Ignition OFF, connect the harness connector at the appropriate Hood Hinge Actuator, press in the CPA (if equipped) until an audible and/or tactile click is heard.
  10. Ignition ON, clear DTCs. Operate the vehicle within the Conditions for Running the DTC.
  11. Verify DTC B00A1 or B009A is not set.
    • If DTC B00A1 or B009A is set 

      Replace the appropriate actuator.

    • If DTC B00A1 or B009A is not set 
  12. All OK.
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