Diagnostic Notes (Read Before Proceding)

This section includes all the information needed to diagnose Powertrain Control Module (PCM) problems. Included are;

- No Start (NS Tests),

- Diagnostic Trouble Code (TC Tests),

- No Trouble Code (NTC Tests),

- Speed Control (SC) System Tests

- Charging System No Code Tests.

The Diagnostic Charts are based on the trouble condition or symptom being present at the time of diagnosis.


When replacement or repairs are required, see Service & Repair for the proper procedure.


Diagnostic procedures change, and new diagnostic systems may be added or enhanced. FAMILIARIZE YOURSELF WITH THIS SECTION BEFORE TRYING TO DIAGNOSE A VEHICLE TROUBLE CODE.



Troubleshooting Procedure

NOTE: All diagnosis should include these six steps;


1. Verify Complaint

2. Check for Related Symptoms

3. Analyze Problem

4. Isolate Problem

5. Repair Problem

6. Verify Proper Operation