LEMON Manuals: Even more car manuals for everyone
Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 297 (Supplemental Restraints System) >> Diagnostic Information and Procedures >> DTC B0001 or B0002 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2022 Cadillac CT5. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
  • Refer to SIR Service Precautions .
  • Refer to SIR Disabling and Enabling .
  • Inspect all terminals for damage or corrosion when disconnecting connectors. Damage or corrosion in the following requires repair or replacement of the affected component/connector.
    • Steering Wheel Airbag
    • Steering wheel Airbag coil
    • Restraints Control Module
    • Airbag wiring harness connector
    • Restraints Control Module wiring harness connector
  • The connector and connector position assurance (CPA) may seat independent of each other. Both the connector and CPA should seat with an audible and/or tactile click.
  1. Ignition OFF.
  2. Verify SIR system is disabled.
  3. Disconnect the appropriate connector at the F107 Steering Wheel Airbag:
    • DTC B0001 = X1
    • DTC B0002 = X2
  4. Test for greater than 25 Ω between control circuit terminal 1 and control circuit terminal 2.
    • If 25 Ω or less 
    1. Verify the appropriate circuits are not shorted together:
      • DTC B0001 = Circuit 3021 and circuit 3020
      • DTC B0002 = Circuit 3023 and circuit 3022
      • If a short between the circuit is found, repair the fault on the circuit.
      • Go to next step: If a short between the circuits is not found
    2. Replace the K36 Restraints Control Module.
    • Go to next step: If greater than 25 Ω 
  5. Ignition ON.
  6. Verify SIR system is disabled.
  7. Test for less than 11 V between the control circuit terminals listed below and ground:
    • Control circuit terminal 1
    • Control circuit terminal 2
    • If 11 V or greater 
    1. Test the following circuits for a short to voltage:
      • DTC B0001 = Circuit 3021 and circuit 3020
      • DTC B0002 = Circuit 3023 and circuit 3022
      • If a short to voltage is found, repair the fault on the circuit.
      • Go to next step: If a short to voltage is not found
    2. Replace the K36 Restraints Control Module.
    • Go to next step: If less than 11 V 
  8. Ignition OFF.
  9. Verify SIR system is disabled.
  10. Test for greater than 25 Ω between the control circuit terminals listed below and ground:
    • Control circuit terminal 1
    • Control circuit terminal 2
    • If 25 Ω or less 
    1. Test the following circuits for a short to ground:
      • DTC B0001 = Circuit 3021 and circuit 3020
      • DTC B0002 = Circuit 3023 and circuit 3022
      • If a short to ground is found, repair the fault on the circuit.
      • Go to next step: If a short to ground is not found
    2. Replace the K36 Restraints Control Module.
    • Go to next step: If greater than 25 Ω 
  11. Ignition OFF.
  12. Verify SIR system is disabled.
  13. Install a 3 A fused jumper wire between control circuit terminal 1 and control circuit terminal 2, ignition ON.
  14. Verify the appropriate scan tool Deployment Loop Resistance parameter is consistently less than 2 Ω while turning the steering wheel 360 degrees in one direction then back 360 degrees in the other direction.
    • If the reading is erratic while turning the steering wheel 

      Replace the X85 Steering Wheel Airbag Coil.

    • If 2 Ω or greater 
    1. Ignition OFF.
    2. Verify SIR system is disabled.
    3. Test the following circuits for an open/high resistance:
      • DTC B0001 = Circuit 3021 and circuit 3020
      • DTC B0002 = Circuit 3023 and circuit 3022
      • If an open/high resistance is found, repair the fault on the circuit.
      • Go to next step: If an open/high resistance is not found
    4. Replace the K36 Restraints Control Module.
    • Go to next step: If less than 2 Ω 
  15. Ignition OFF, connect the harness connector at the F107 Steering Wheel Airbag and press in the CPA (if equipped) until an audible and/or tactile click is heard.
  16. Ignition ON, clear DTCs. Operate the vehicle within the Conditions for Running the DTC.
  17. Verify DTC B0001 or B0002 is not set.
    • If DTC B0001 or B0002 is set 

      Replace the F107 Steering Wheel Airbag.

    • Go to next step: If DTC B0001 or B0002 is not set 
  18. A fault is not currently present and may be an intermittent condition.
scientia non olet · About LEMON Manuals