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Home >> Buick >> 2017 >> Envision Base >> Repair and Diagnosis (Single Page) >> Restraints >> Air Bag, SRS >> Supplemental Inflatable Restraint System >> Diagnostic Information and Procedures >> DTC B003E or B003F: Driver/Passenger Seat Belt Load Limiter Deployment Loops >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, scan tool disconnected, disconnect the appropriate F124 Seat Belt Load Limiter harness connector. It may take up to 2 minutes for all vehicle systems to power down.
  2. Test for greater than 25 Ω between the control circuit terminals 1 and 2.
    • If 25 Ω or less 
    1. Disconnect the X1 harness connector at the K36 Inflatable Restraint and Sensing Diagnostic Module.
      2. NOTE:

      Some connectors may be equipped with shorting bars as a safety component to prevent accidental inflator 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.

    2. Test for infinite resistance between the two control circuits.
      • If less than infinite resistance, repair the short between the two circuits.
      • If infinite resistance, replace the K36 Inflatable Restraint and Sensing Diagnostic Module.
    • If greater than 25 Ω 
  3. Ignition ON.
  4. Test for less than 11 V between each control circuit terminal listed below 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 and Sensing Diagnostic Module, ignition ON
    2. Test for less than 1 V between the 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 and Sensing Diagnostic Module.
    • If less than 11 V 
  5. Ignition OFF.
  6. Test for greater than 25 Ω 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 and Sensing Diagnostic Module.
    2. Test for infinite resistance between the control circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the K36 Inflatable Restraint and Sensing 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 scan tool Deployment Loop Resistance parameter is less than 2 Ω.
    • If 2 Ω or greater 
    1. Ignition OFF, disconnect the X1 harness connector at the K36 Inflatable Restraint and Sensing 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 and Sensing Diagnostic Module.
    • If less than 2 Ω 
  9. Ignition OFF, connect the harness connector at the F124 Seat Belt Load Limiter, 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 B003E or B003F is not set.
    • If DTC B003E or B003F is set 

      Replace the F124 Seat Belt Load Limiter.

    • If DTC B003E or B003F is not set 
  12. All OK.
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