Brake Shift Interlock System

The Brake Shift Interlock System prevents the transmission range selector lever from being shifted out of PARK position unless the ignition key is in the ON position and the brake pedal is depressed. The brake shift consists of an electrical solenoid mounted at the base of the steering column. If ignition key is in the RUN position, the solenoid continually runs unless the brake is depressed.

If the brake circuit fuse is blown or the solenoid has internally shorted, the vehicle will not shift from the PARK position even if the ignition is on and the brake pedal is depressed. The interlock can be temporarily overridden by the following:

1. Apply parking brake.
2. Remove the ignition key.
3. Insert the ignition key and rotate one position clockwise (ignition off).
4. Shift the selector lever to neutral.

NOTE:
If the vehicle is shifted into park, the above procedure must be repented.

5. Start the vehicle.

Transmission Control Switch (TCS)





The Transmission Control Switch (TCS) is a driver-controlled momentary contact switch mounted on the end of the transmission range selector lever. When the TCS is activated (TCIL on), 4th gear operation (overdrive) is cancelled, and engine braking is provided in 1st, 2nd, 3rd and reverse gear.

Transmission Control Indicator Lamp (TCIL)

The Transmission Control Indicator Lamp (TCIL) is located on the instrument panel and is a visual cue to let the driver know that the TCS has been depressed and 4th gear has been cancelled (TCS on/TCIL activated). The TCIL will flash if the Powertrain Control Module (PCM) detects a concern in certain transmission-related sensors or solenoids.