Brake Shift Interlock Operation
The BSIA inhibits the selector lever movement from the PARK position by mechanically blocking the detent pawl of the selector lever mechanism. When the brake pedal is pressed (BPP switch closed) with the ignition key in the RUN/START position and the transmission in PARK, the BSIA is energized by the SJB, this allows the selector lever to be moved out of the PARK position.
Scheme 3
Proper Operation Requirements
Three requirements for the selector lever to be moved from the PARK position are
- Ignition switch in the RUN/START position
- TR sensor in the PARK position
- BPP switch closed (brakes applied - brake lamps on)
SPECIAL TOOLS CHART Fluke 77-IV Digital Multimeter FLU77-4 or equivalent Vehicle Communication Module (VCM) and Integrated Diagnostic System (IDS) software with appropriate hardware, or equivalent scan tool
