Six-Step Troubleshooting Procedure

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Make sure the vehicle being tested has a fully charged battery. If it does not, false diagnostic codes or error messages may occur.

Diagnosis of the Powertrain Control Module (PCM) is done in six basic steps:
- Verification Of Complaint
- Verification Of Any Related Symptoms
- Symptom Analysis
- Problem Isolation
- Repair Of Isolated Problem
- Verification Of Proper Operation

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