Pinpoint Test

1. Ignition OFF.
2. Check the accessory drive belt and tensioner for damage and correct installation. REFER to ACCESSORY DRIVE BELT or REFER to ACCESSORY DRIVE BELT TENSIONER .
3. Check the accessory mounting brackets and generator pulley for looseness or misalignment.

Is the accessory drive OK? 

1. Yes: GO to 2  .
2. No: REPAIR as necessary. REFER to SYMPTOM CHART: FRONT END ACCESSORY DRIVE (FEAD) for diagnosis and testing of the accessory drive system.

1. Check the generator mounting for loose bolts or misalignment.

Is the generator mounted correctly? 

1. Yes: GO to 3  .
2. No: REPAIR as necessary.

1. With the engine running, use a stethoscope or equivalent listening device to probe the generator and the accessory drive area for unusual mechanical noise.

Is the generator the noise source? 

1. Yes: INSTALL a new generator. REFER to Generator - 3.5L Ti-VCT  or Generator - 2.0L GTDI .
2. No: REFER to SYMPTOM CHART(S) : NVH to diagnose the source of the engine noise.