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Home >> Cadillac >> 2018 >> CT6 Plug-In >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Shift Lock Control System >> Diagnostic Information and Procedures >> Transmission Control Lever Malfunction >> Circuit/System Verification
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Circuit/System Verification

  1. Ignition On/Vehicle in Service Mode..
  2. Verify the scan tool Brake Transmission Shift Interlock Solenoid Actuator Command parameter changes from Inactive to Active when the brake pedal is applied.
    • If the Brake Transmission Shift Interlock Solenoid Actuator Command does not change 

      Refer to Stop Lamps Malfunction .

    • Go to next step: If the Brake Transmission Shift Interlock Solenoid Actuator Command changes 
  3. Verify the S3 Transmission Shift Lever moves out of the PARK position when the brake pedal is applied.
    • If the S3 transmission shift lever does not move out of the PARK position 

      Refer to Circuit/System Testing.

    • Go to next step: If the S3 Transmission Shift Lever does move out of the PARK position 

      Go to next step: All OK.

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