Brake Shift Interlock System
The shift interlock system prevents shifting the transmission out of the PARK position unless the brake pedal is depressed. The shift interlock system consists of a shift lock actuator mounted on the ignition switch. The actuator is energized when the ignition switch is turned to RUN, locking the transmission range selector lever in the PARK position. When the brake pedal is applied and the brake pedal position (BPP) switch activated, the shift lock actuator is deactivated, allowing the selector lever to move out of the PARK position.
The ignition shift interlock cable locks the selector lever in the PARK position when the ignition switch is in the lock position. It also requires the selector lever to be in the PARK position in order to turn the ignition switch to the lock position.
Transmission Control Switch (TCS)
The TCS is a momentary contact switch that sends a signal to the PCM when the driver selects the D4 position, canceling operation of fifth (overdrive) gear.
The TCS is located within the range selector assembly.
The PCM uses this signal to control the shift solenoids to disengage/disable fifth gear operation and activate coast clutch. At the same time, the PCM changes the instrument panel indicator to display D4.
When the driver moves the selector lever back to the D5 position, fifth gear operation is enabled, the coast clutch is released and the instrument panel indicator displays D5.
Park Sense Switch
The park sense switch prevents the redundant PRNDL from displaying "P" until the shifter is in the PARK position.
Electronic Transmission Error Indicator
The vehicle is equipped with a redundant electronic gearshift indicator. This character appears with the key in the RUN position and displays the same gear selection as shown on the selector lever floor console next to the range selector lever. If an "E" character flashes or remains on, this indicates that a transmission malfunction has occurred.
Refer to SHIFT INTERLOCKS for schematic and connector information.
