Brake Transmission Shift Interlock Mechanism - Operation
OPERATION
The Brake Transmission Shifter/Ignition Interlock (BTSI) is engaged whenever the ignition switch is in the LOCK (1) position. An additional electrically activated feature will prevent shifting out of the PARK position unless the brake pedal is depressed at least one-half inch. A solenoid in the shifter assembly is energized when the ignition is in the ON position and the brake pedal is depressed. When the key is in the ON position and the brake pedal is depressed, the shifter is unlocked and will move into any position. The interlock system also prevents the ignition switch from being turned to the LOCK position, unless the shifter is in the gated PARK position. When the shifter is in the PARK position and the ignition switch is turned to the LOCK position, the shifter will remain active for 60 seconds allowing the key to be removed from the ignition switch. If the key is not removed from the ignition switch within this 60 seconds, the key will be locked in the ignition switch. To remove key, it is necessary to turn the key to the ON position and back to the LOCK position and removed within 60 seconds.
The following chart describes the normal operation of the Brake Transmission Shift Interlock (BTSI) system. If the "expected response" differs from the vehicle's response, then system repair and/or adjustment is necessary.
BTSI Override
NOTE: Remove the small external trim cover on the right side of the shift lever housing to actuate the Brake Transmission Shifter/Ignition Interlock (BTSI).
In the event of an electrical failure, the vehicle can be shifted out of PARK by using the following procedure.
1. Turn the key to the ACC or ON position.
2. Remove the small external trim cover on the right side of the shift lever housing
3. Depress the BTSI override (3) on the side of the shifter assembly (1).
4. While the override is depressed, move the shifter out of the PARK position.
5. Return the small external trim cover to its original location.