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 Anchor Plate Tensioner
- Restraints Control Module
- Seat Belt Anchor Plate Tensioner 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.
- Ignition OFF.
- Verify the SIR system is disabled.
- Disconnect the harness connector at the appropriate F113 Seat Belt Anchor Plate Tensioner.
- Test for greater than 25 Ω between the control circuit terminals 1 and circuit terminal 2.
- If 25 Ω or less
- Disconnect the X2 harness connector at the K36 Restraints Control Module.
- Verify the appropriate circuits are not shorted together:
- DTC B0070 = Circuit 3481 and circuit 3482
- DTC B0072 = Circuit 3479 and circuit 3480
- 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
- Replace the K36 Restraints Control Module.
- Go to next step: If greater than 25 Ω
- Ignition ON.
- Verify the SIR system is disabled.
- 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
- Test the following circuits for a short to voltage:
- DTC B0070 = Circuit 3481 and circuit 3482
- DTC B00013 = Circuit 3479 and circuit 3480
- 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
- Replace the K36 Restraints Control Module.
- Go to next step: If less than 11 V
- Ignition OFF.
- Verify the SIR system is disabled.
- 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
- Test the following circuits for a short to ground:
- DTC B0070 = Circuit 3481 and circuit 3482
- DTC B000213 = Circuit 3479 and circuit 3480
- 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
- Replace the K36 Restraints Control Module.
- Go to next step: If greater than 25 Ω
- Install a 3 A fused jumper wire between the control circuit terminals 1 and 2, ignition ON.
- Verify the scan tool Deployment Loop Resistance parameter is less than 2 Ω.
- If 2 Ω or greater
- Verify the SIR system is disabled.
- Test the following circuits for an open/high resistance:
- DTC B0070 = Circuit 3481 and circuit 3482
- DTC B0072 = Circuit 3479 and circuit 3480
- 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
- Replace the K36 Restraints Control Module.
- Go to next step: If less than 2 Ω
- Test the following circuits for an open/high resistance:
- Ignition OFF, connect the harness connector at the appropriate F113 Seat Belt Anchor Plate Tensioner, press in the CPA (if equipped) until an audible and/or tactile click is heard.
- Ignition ON, clear DTCs. Operate the vehicle within the Conditions for Running the DTC.
- Verify DTC B0070 or B0072 is not set.
- If DTC B0070 or B0072 is set
Replace the appropriate F113 Seat Belt Anchor Plate Tensioner.
- Go to next step: If DTC B0070 or B0072 is not set
- If DTC B0070 or B0072 is set
- All OK.