LEMON Manuals: Even more car manuals for everyone
Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 27 (Supplemental Restraints System) >> Diagnostic Information and Procedures >> DTC B007E or B007F >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2022 Cadillac CT4. 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.
    • Seat Belt Retractor
    • Restraints Control module
    • Seat Belt Retractor 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 the SIR system is disabled.
  3. Disconnect the harness connector at the appropriate F112 Seat Belt Retractor.
  4. Test for greater than 25 Ω between the control circuit terminals 1 and circuit terminal 2.
    • If 25 Ω or less 
    1. Disconnect the X2 harness connector at the K36 Restraints Control Module.
    2. Verify the appropriate circuits are not shorted together:
      • DTC B007E = Circuit 3477 and circuit 3478
      • DTC B007F = Circuit 3475 and circuit 3476
      • 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
    3. Replace the K36 Restraints Control Module.
    • Go to next step: If greater than 25 Ω 
  5. Ignition ON.
  6. Verify the SIR system is disabled.
  7. 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. Test the following circuits for a short to voltage:
      • DTC B007E = Circuit 3477 and circuit 3478
      • DTC B00013 = Circuit 3475 and circuit 3476
      • 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 the SIR system is disabled.
  10. 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. Test the following circuits for a short to ground:
      • DTC B007E = Circuit 3477 and circuit 3478
      • DTC B000213 = Circuit 3475 and circuit 3476
      • 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. Install a 3 A fused jumper wire between the control circuit terminals 1 and 2, ignition ON.
  12. Verify the scan tool Deployment Loop Resistance parameter is less than 2 Ω.
    • If 2 Ω or greater 
    1. Verify the SIR system is disabled.
    2. Test the following circuits for an open/high resistance:
      • DTC B007E = Circuit 3477 and circuit 3478
      • DTC B007F = Circuit 3475 and circuit 3476
      • 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
    3. Replace the K36 Restraints Control Module.
    • Go to next step: If less than 2 Ω 
  13. Ignition OFF, connect the harness connector at the appropriate F112 Seat Belt Retractor, press in the CPA (if equipped) until an audible and/or tactile click is heard.
  14. Ignition ON, clear DTCs. Operate the vehicle within the Conditions for Running the DTC.
  15. Verify DTC B007E or B007F is not set.
    • If DTC B007E or B007F is set 

      Replace the appropriate F112 Seat Belt Retractor.

    • Go to next step: If DTC B007E or B007F is not set 
  16. All OK.
scientia non olet · About LEMON Manuals