Inspection And Verification

WARNING: This page is about a different variant/trim than selected.

CAUTION: Diagnosis by substitution from a donor vehicle is NOT acceptable. Substitution of control modules does not guarantee confirmation of a fault, and may also cause additional faults in the vehicle being tested and/or the donor vehicle.

Verify the customer concern.
Visually inspect for obvious signs of mechanical damage.

VISUAL INSPECTION

MECHANICAL
Drive belt condition (cracking/damage/contamination) Idler assembly Generator Engine cooling fan Tensioner assembly Engine coolant pump Air conditioning (A/C) compressor Torsional vibration damper Dynamic response pump Tensioner assembly Accessory drive belt

If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
If the cause is not visually evident, verify the symptom and refer to the Symptom Chart. Alternatively check for Diagnostic Trouble Codes (DTCs) and refer to the appropriate Diagnostic Trouble Code (DTC) Index information.