Inspection and Verification

Since diagnosis and testing actually begins when repairs are taken on, the following procedure is recommended.

1. Verify the customer concern by operating the system.
2. Visually inspect for obvious signs of mechanical damage or electrical damage. If the concern cannot be reproduced, carry out a road test and/or visual check with the aid of the following table.
   Fig 1: Mechanical Components Visual Inspection Chart

   Courtesy of FORD MOTOR CO.

   The engine, fuel system, ignition system, emissions system and exhaust system all affect exhaust emission levels and must be maintained according to the maintenance schedule. Refer to the scheduled Maintenance Guide.

   Correct engine identification is required to order parts. Refer to the appropriate ENGINE article for the procedure.

   For complete vehicle and engine identification codes, refer to INTRODUCTION - CARS .

3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
4. If the concern is not visually evident, verify the symptom. GO to Symptom Chart .