Sephia LS Sedan L4-1.8L (1998)
Shift Interlock Switch: Description and Operation
With the ignition switch in ON, battery voltage is applied to the shift lock actuator through the ECM IGI fuse. Battery voltage is applied at all times
through the ECM B+ fuse to the actuator. Battery voltage through the STOP fuse is applied to the actuator when the brake pedal is depressed. With the
ignition switch in ON, the brake pedal depressed and the gear selector lever in park, the relays inside the shift lock control actuator energize and apply
battery voltage and ground to the shift lock servo motor. The motor then drives the piston out, which allows the gear selector to be moved from the park
position. When the gear selector is moved from park, the shift lock control cable mechanically prevents removal of the key from the ignition switch.
Moving the gear selector also opens the park range switch, deenergizing the relays.
When the vehicle is later parked and the gear selector moved to the park position, the park range switch closes. The motor retracts the piston, locking the
gear selector in park. With the gear selector in the park position, the shift lock control cable now allows the key to be removed from the ignition switch.
In emergency situations, the gear selector can be moved out of park with a screwdriver, eliminating the need to depress the brake pedal.
