Symptom Diagnosis

Symptom checks cannot be used properly unless the problem occurs while the vehicle is being tested. To reduce diagnostic time, ensure steps in the BASIC TESTING article have been performed.

Before diagnosing symptoms or intermittent faults, ensure steps in appropriate articles were performed before diagnosing a symptom. See following list.

• See: TESTS W/CODES - MOTRONIC 5.2 SYSTEM
• See: TESTS W/CODES - TRIONIC SYSTEM

Symptoms available for diagnosis include:

• Difficult To Start
• Rough Or Unstable Idle
• Engine Hesitates Or Misses
• Poor Fuel Mileage
• Engine Will Not Start
• Engine Starts But Stops
• Poor Response On Acceleration
• Lack Of Power