Shift Interlock: Description and Operation

Key Interlock
Battery voltage is supplied at all times through fuse 30 to the key interlock switch. When the key is in the ignition, battery voltage is supplied to the key interlock solenoid and the key interlock circuit in the interlock control unit. When the A/T shift lever is in PARK and the A/T shift lever push button is released, the key interlock circuit removes ground from the key interlock solenoid, the solenoid is deenergized, and the key can be removed from the ignition.

Shift Position Interlock
Battery voltage is supplied at all times through fuse 30 to the brake switch. With the ignition ON (II) or at START (III), battery voltage is supplied through fuse 1 to the shift lock solenoid. When you push the brake pedal, battery voltage is applied through the GRN/WHT wire to the Powertrain Control Module (PCM). If, at the same time, you do not push the accelerator pedal, a low voltage signal is sent through the RED/BLK wire to the PCM. The PCM then applies voltage through the WHT/GRN wire to the shift lock circuit in the interlock control unit. If the shift lever is in the PARK position, the shift lock circuit provides ground to the shift lock solenoid. The solenoid is then energized, and the shift lever can be moved from the PARK position.


The vehicle is equipped with the following devices to prevent inadvertent shifting:
^ A/T shift lever assembly with shift lock (Shift Lock System)
^ Ignition key cylinder with interlock mechanism (Key Interlock System)




Shift Lock System:
The shift lock system prevents the shift lever from moving to [R] or [D] from the [P] position unless the brake pedal is depressed and the accelerator is in its rest position.

NOTE:
^ The shift lever cannot be shifted when the brake pedal and the accelerator are depressed at the same time.
^ In case of system malfunction, the shift lever can be released by pushing a key into the release slot near the shift lever.




Key Interlock System:
When the shift lever is in any position other than [P] or is not securely locked in [P] (parking pin switch is ON), a solenoid is activated, making it impossible to remove the ignition key from the ignition switch.
To be able to remove the key, the shift lever must be in [P] and must be securely locked in this position (parking pin switch must be turned off by the lock pin).




The shift lever is in any position other than [P], and the parking pin switch is ON.




The shift lever is in [P], and the parking pin switch is OFF.