Initial Inspection and Diagnostic Overview

Starting System

Inspection and verification
1. Verify the customer concern.
2. Visually inspect for obvious mechanical or electrical faults.

Mechanical Electrical
^ Battery
^ Fuses Central and battery junction boxes Megafuses
^ Gear selector lever
cable adjustment
(vehicles with
automatic transmission) ^ Wiring harness(es)
^ Starter motor ^ Damaged, loose or corroded connectors
^ Ignition switch
^ Engine (turns freely) ^ Starter relay
^ Transmission control module (TCM)
^ Engine control module (ECM)

3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
4. Use the approved diagnostic system or a scan tool to retrieve any diagnostic trouble codes (DTCs) before moving onto the symptom chart or DTC index.
^ Make sure that all DTCs are cleared following rectification.

Make sure that all DTCs are cleared following rectification.