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Home >> Cadillac >> 2021 >> XT5 Sport >> Repair and Diagnosis >> External Pages >> Different car >> Section 385 (Shift Lock Control System) >> Diagnostic Information and Procedures >> Transmission Control Lever Malfunction >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2021 GMC Sierra 3500 HD and 2021 GMC Sierra 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition / Vehicle - Off
  2. Disconnect the electrical connector: S3 Transmission Shift Lever
  3. Connect a 3 A fused jumper wire between the test points: Control terminal 1 & 12 V
  4. Momentarily connect a jumper wire between the test points: Ground terminal 2 & Ground

    Verify the component produces a clicking sound: M7 Transmission Shift Lock Control Solenoid Actuator

    • If the component does not produce a sound 

      Replace the component: S3 Transmission Shift Lever

    • Go to next step: If the component produces a sound 
  5. All OK.
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