Initial Inspection and Diagnostic Overview

Inspection and Verification
1 Verify the customer concern.
2 Visually inspect for obvious signs of damage and system integrity.





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 and refer to the Symptom Chart, alternatively check for Diagnostic Trouble Codes (DTCs) and refer to the relevant DTC Index.

DTC Index
For a list of DTCs that could log in the Engine Control Module (ECM) refer to section 303-14. For additional information, refer to Electronic Engine Controls Testing and Inspection
For additional information, refer to Electronic Engine Controls