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.
- The F114D Instrument Panel Lower Airbag - Driver
- The F114P Instrument Panel Lower Airbag - Passenger
- K36 Restraints Control Module
- All wiring harness connectors
- 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 F114 Instrument Panel Lower Airbag.
Test for greater than 25 Ω between the control circuit terminals 1 and circuit terminal 2.
- If 25 Ω or less
1. Disconnect the X1 harness connector at the K36 Restraints Control Module.
2. Verify the appropriate circuits are not shorted together:
  - DTC B0004 = Circuit 3078 and circuit 3079
  - DTC B0013 = Circuit 3076 and circuit 3077
  - 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
Ignition ON.
Verify the SIR system is disabled.
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 B0004 = Circuit 3078 and circuit 3079
  - DTC B00013 = Circuit 3076 and circuit 3077
  - 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
Ignition OFF.
Verify the SIR system is disabled.
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 B0004 = Circuit 3078 and circuit 3079
  - DTC B0013 = Circuit 3076 and circuit 3077
  - 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
Ignition OFF.
Verify the SIR system is disabled.
Install a 3 A fused jumper wire between control circuit terminal 1 and control circuit terminal 2, ignition ON.
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 B0004 = Circuit 3078 and circuit 3079
  - DTC B0013 = Circuit 3076 and circuit 3077
  - 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
Ignition OFF, connect the harness connector at the appropriate F114 Instrument Panel Lower Airbag, 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 B0004 or B0013 is not set.
- If DTC B0004 or B0013 is set
  Replace the appropriate F114 Instrument Panel Lower Airbag.
- Go to next step: If DTC B0004 or B0013 is not set
A fault is not currently present and may be an intermittent condition.