Initial Inspection and Diagnostic Overview

1. Verify the customer's concern by performing the Operational Test to duplicate the condition. Initial Inspection and Diagnostic Overview
2. Inspect to determine if one of the following mechanical or electrical concerns apply:

Mechanical
- Shift control linkage binding.
- Damaged ignition switch key cylinder.
- Damaged shift cable.
- Shift cable out of adjustment.
- The gearshift lever pin won't engage the switch in the PARK position.

Electrical
- Circuitry open/shorted.
- Blown fuse.
- Damaged shift lock solenoid.
- Damaged key removal inhibit solenoid.
- Damaged powertrain control module.
- Damaged instrument interface module.
- Burned-out bulb.

3. If inspection reveals obvious concern(s) that can be readily identified, service as required.
4. If the concern(s) remain after the inspection, determine the symptom(s) and go to Diagnosis by Symptom. External Controls/Shift Interlock