Shift Interlock: Description and Operation

Key Interlock

Voltage is supplied at all times to the key interlock switch through fuse 41. When you push the key while it is in the ignition, battery voltage is provided to the key interlock solenoid. When the A/T shift lever is in PARK, the parking pin switch provides ground to the key interlock solenoid, the solenoid is energized. and the key can then be turned to the LOCK (0) position.

Shift Position Interlock

Battery voltage is supplied at all times through fuse 41 to the brake switch. With the ignition in ON (II) or START (III), battery voltage is supplied through fuse 18 to the shift lock solenoid. When you push the brake pedal, battery voltage is applied through the WHT/BLK wire to the transmission control module (TCM). 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 TCM. The TCM then applies voltage through the WHT/GRN wire to the shift lock circuit in the passenger's multiplex 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.