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Home >> Cadillac >> 2021 >> CT4 Sport, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 21 (Wiring Systems And Power Management - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> Retained Accessory Power Malfunction >> 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.
  1. Ignition ON.
  2. Verify DTC B1B12 is not set
    • Go to next step: DTC B1B12 is not set 
  3. Open the drivers door.
  4. Verify that the KR76 Accessory Time Delay Cutoff Relay cycles on and off while switching the ignition between Run and OFF. by verifying a click is heard and/or felt.
    • Go to next step: If a click is heard and/or felt 
  5. Refer to: The appropriate diagnosis for your device (s) that are inoperative.
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