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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 27 (Supplemental Restraints System) >> Diagnostic Information and Procedures >> DTC B0004 or B0013 >> Circuit/System Verification

Circuit/System Verification

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:

The condition may be intermittent and require driving the vehicle, then reviewing the snapshot to verify resistance parameters do not drop out or spike. Refer to Testing for Intermittent Conditions and Poor Connections

  1. Verify the appropriate scan tool Deployment Loop Resistance parameters stay consistently between 2.1 and 4.0 Ω:
    • F114D Instrument Panel Lower Airbag - Driver
    • F114P Instrument Panel Lower Airbag - Passenger
    • If less than 2.1 or greater than 4.0 Ω 

      Refer to Circuit/System Testing.

    • If there are spikes or dropouts, perform the following: 
    • Inspect each connector terminal and harness for damage or corrosion and repair as necessary.
    • Ensure each connector and CPA is correctly seated
    • Go to next step: If between 2.1 and 4.0 Ω without any spikes or dropouts 
  2. A fault is not currently present and may be an intermittent condition.
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