- Flow of Diagnosis - Start Here

Flow Of Diagnosis:

1. Get accurate description of complaint. Road test the vehicle to verify. Perform underhood inspection.

VISUALLY CHECK:
Vacuum hoses for splits, kinks and proper routing.
Ignition wires 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. If "CHECK ENGINE LIGHT OR SERVICE ENGINE SOON LIGHT" Is on, or codes other than code 12 are stored you must refer to Computerized Engine Controls section. This step also checks to see that the on-board diagnostics are working. If after correcting problem excessive emission levels still exist proceed to step 4.

4. If excessive emission levels or poor engine performance is related to emission control components or devices, and there is no "Check Engine" or "Service Engine Soon" light on see DIAGNOSIS BY SYMPTOM.

5. See diagnosis by symptom under TESTING PROCEDURES for symptom vehicle is exhibiting. Follow procedures as outlined for given symptom.