Diagnostic Routine W

Diagnostic Routine W

Diagnostic Overview

Ignition Key Cannot Be Returned To OFF Position

Refer to Wiring Diagram Set 37 for schematic and connector information Electrical Diagrams.

Normal Operations and Fault Conditions

The ignition switch contains a key removal inhibit solenoid. The solenoid prevents the ignition lock cylinder to be turned to lock and the key removed any time the transmission selector lever is in any position except PARK (P) (automatic transmission only). The inhibit solenoid receives voltage at all times from BCM (Body Control Module) fuse 78 (5A). When the transmission selector lever is in any gear except PARK (P), the selector switch closes, supplying ground to the solenoid.

Visual Inspection and Diagnostic Pre-checks

- Inspect the transmission selector lever.

Pinpoint Test

1. CHECK FOR AN ENERGIZED KEY REMOVAL INHIBIT SOLENOID

1. Remove BCM (Body Control Module) fuse 78 (5A).

2. Attempt to turn the ignition key to the ON position and then back to the LOCK position and remove the key.

Does the ignition lock cylinder turn to the lock position and can the key be removed?






2. CHECK THE IGNITION LOCK CYLINDER FOR BINDING

1. Remove the ignition lock cylinder. REFER to Ignition Lock Cylinder - Functional or REFER to Ignition Lock Cylinder - Non Functional .

2. Rotate the ignition lock cylinder through all positions using the key.

Does the ignition lock cylinder freely rotate through all positions and can the key be removed from the lock cylinder?