Grand Cherokee 2WD V8-4.7L VIN J (2004)
Shift Interlock Solenoid: Description and Operation
BRAKE TRANSMISSION SHIFT INTERLOCK MECHANISM
DESCRIPTION
The Brake Transmission Shifter/Ignition Interlock (BTSI), is a cable and solenoid operated system. It interconnects the automatic transmission floor
mounted shifter to the steering column ignition switch (Fig. 71).
OPERATION
The system locks the shifter into the PARK position. The interlock system is engaged whenever the ignition switch is in the LOCK or ACCESSORY
position. An additional electrically activated feature will prevent shifting out of the PARK position unless the brake pedal is depressed approximately
one-half an inch. A magnetic holding device in the shifter assembly is energized when the ignition is in the RUN position. When the key is in the RUN
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 or ACCESSORY position, unless the shifter is fully locked into the PARK position.
