Shift Interlock System
SHIFT INTERLOCK SYSTEMDESCRIPTION
The Brake Transmission Shifter/Ignition Interlock (BTSI) is a cable and solenoid operated system that prevents the transmission gear shifter from being moved out of PARK without a driver in place.
Refer to the diagnostic chart for expected shifter response, depending on ignition key/switch (Fig. 314) and brake pedal positions.