Initial Inspection and Diagnostic Overview

Flow of Diagnosis:

1. Get accurate description of complaint. Road test vehicle to verify. Perform underhood inspection. For further information use the DRIVEABILTY WORKSHEET and VEHICLE REPAIR HISTORY forms below.

VISUALLY CHECK:

Vacuum hoses for splits, kinks, and proper routing.
Ignition wiring for cracking, hardness, and proper connections at both the distributor and spark plugs.
All wiring for proper connections, pinches and cuts.
Wiring harness for proper routing.
Check for missing components.
2. Check TSB'S for manual updates, testing procedures, warranty and recall information.
3. Refer to TESTING PROCEDURES/ON-BOARD DIAGNOSTIC CIRCUIT CHECK.
NOTE: The DRB II or an equivalent scan tool is required to extract fault codes.
4. Fault codes are codes that are stored by the ECU when a monitored circuit has a failure. Each code represents a problem or failure of a specific system, and is stored in the ECU memory so that they can be displayed to a technician for diagnosis. If, after performing On-Board Diagnosis, it has been determined that no codes have been stored and driveability problem still exists, then proceed to step 5.
5. See TESTING PROCEDURES/DIAGNOSIS BY SYMPTOM for symptom vehicle is exhibiting. Follow procedures as outlined for given symptom.

Driveability Worksheet:

Driveability Worksheet:

DRIVEABILITY WORKSHEET

Vehicle Repair History:

Vehicle Repair History:

VEHICLE REPAIR INFORMATION