Ignition Key Inhibit

The ignition key inhibit feature prevents the ignition lock cylinder from being rotated to the OFF/LOCK position when the vehicle is not in PARK.

The key removal inhibit solenoid receives battery voltage at all times. The ground control circuit for the key removal inhibit solenoid is routed to a park detect switch within the selector lever assembly. The ground is controlled by the BCM.

When the selector lever is in PARK, the park detect switch inside the selector lever assembly is open, preventing the solenoid from actuating. When the selector lever is moved out of PARK, the switch closes and completes the circuit to the BCM.

The BCM controls the ground by means of a Field Effect Transistor (FET). The BCM enables the path to ground when it detects the vehicle is not in PARK based on messages received over the CAN.

When the selector lever is in PARK, the key removal inhibit solenoid deactivates and allows the ignition lock cylinder to be turned to the OFF/LOCK position to remove the key.