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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 143 (Fixed And MOVEABLE Windows) >> Diagnostic Information and Procedures >> DTC B1953 >> 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/Vehicle - In Service Mode
  2. Operate the component: S79P Front Side Door Window Switch-Passenger - Pressed & Pulled

    Verify the component works as specified:

    • M74P Front Side Door Window Regulator Motor-Passenger = Up
    • M74P Front Side Door Window Regulator Motor-Passenger = Express Up
    • M74P Front Side Door Window Regulator Motor-Passenger = Down
    • M74P Front Side Door Window Regulator Motor-Passenger = Express Down
    • If the component does not work as specified 

      Refer to: Circuit/System Testing

    • Go to next step: If the component works as specified 
  3. A fault that is not currently present may have been caused by a intermittent condition.
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