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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 377 (Power Seats) >> Diagnostic Information and Procedures >> Power Seat Malfunction (Driver with A45) >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2022 Cadillac CT5. However, it is still accessible from the selected car via links, so may be relevant.

Seat Motor

  1. Ignition/Vehicle OFF, disconnect the connector at the appropriate seat motor listed below:
    • M50D Front Seat Tilt Adjuster Actuator - Driver
    • M51D Front Seat Adjuster Actuator - Driver
    • M55D Front Seat Vertical Adjuster Actuator - Driver
    • M56D Front Seat Recliner Actuator - Driver
    2. NOTE:

    When performing the following tests, make sure that the seat is not already in the position the test is attempting to produce.

  2. Install a 30 A fused jumper wire between control terminal 1 and 12 V.
  3. Momentarily install a jumper wire between control terminal 3 and ground. The seat motor should momentarily perform the appropriate FORWARD / REARWARD / UP / DOWN function.
    • If the motor does not perform the FORWARD / REARWARD / UP / DOWN function 

      Replace the seat motor.

    • Go to next step: If the motor performs the FORWARD / REARWARD / UP / DOWN function 
  4. Reverse the jumper wires; the motor should perform FORWARD / REARWARD / UP / DOWN function.
    • If the motor does not perform the FORWARD / REARWARD / UP / DOWN function 

      Replace the seat motor.

    • Go to next step: If the motor performs the FORWARD / REARWARD / UP DOWN function 
  5. All OK.
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