Pinpoint Test

NOTE: Under no circumstances should the accessory drive belt, tensioner or pulleys have any fluids or belt dressing applied to them as damage to the belt material and tensioner damping mechanism may occur.

CHECK THE ACCESSORY DRIVE BELT
1. Check the condition of the accessory drive belt and for correct installation. REFER to ACCESSORY DRIVE BELT in this section.
  - Is the accessory drive belt acceptable?
  - Yes: GO to 2 on page 2.
  - No: Install a new accessory drive belt. REFER to FRONT END ACCESSORY DRIVE (FEAD) - EXPLODED VIEW .
CHECK FOR FLUID CONTAMINATION ON THE ACCESSORY DRIVE BELT
- Is the accessory drive belt clean and dry?
- Yes: GO to 3 on page 2.
- No: For a drive belt that has been exposed to fluid contamination during vehicle operation, such as leaks from the power steering system, A/C system or cooling system, clean all pulleys with soap and water, rinse with clean water and install a new accessory drive belt. REFER to FRONT END ACCESSORY DRIVE (FEAD) - EXPLODED VIEW .
  For a drive belt that has been exposed to fluids in a localized area during routine vehicle service, such as replacement of hoses or fluids, the drive belt and pulleys should be washed with soap and water immediately (prior to starting the engine), and rinsed with clean water.
CHECK FOR DAMAGED ACCESSORY DRIVE BELT TENSIONER
1. Test the accessory drive belt tensioner. REFER to ACCESSORY DRIVE BELT TENSIONER in this section.
  - Does the accessory drive belt tensioner function correctly?
  - Yes: GO to 4 on page 2.
  - No: Install a new accessory drive belt tensioner. REFER to FRONT END ACCESSORY DRIVE (FEAD) - EXPLODED VIEW .
CHECK FOR PULLEY MISALIGNMENT OR EXCESSIVE PULLEY RUNOUT
1. Determine the area where the noise comes from.
2. Check each of the pulleys in that area with a straightedge to the crankshaft pulley.
3. Look for accessory pulleys out of position in the fore/aft direction or at an angle to the straightedge.
  - Is the pulley(s) misaligned or have excessive pulley runout?
  - Yes: Inspect the pulley. Replace as necessary. For crankshaft pulley REFER to CRANKSHAFT PULLEY AND CRANKSHAFT FRONT SEAL - EXPLODED VIEW and REFER to CRANKSHAFT PULLEY , for generator REFER to GENERATOR - 3.5L TI-VCT , for A/C compressor REFER to AIR CONDITIONING (AC) COMPRESSOR - 3.5L TI-VCT .
  - No: GO to 5 on page 3.
CHECK FOR DAMAGED ACCESSORIES
1. Remove the accessory drive belt.
2. Check that each accessory pulley can be rotated by hand in the unloaded condition.
3. Check that each accessory pulley does not feel loose or is binding.
  - Do each of the accessory pulleys rotate smoothly by hand?
  - Yes: GO to 6 on page 3.
  - No: Inspect the accessories. Install a new accessory if necessary. For generator REFER to GENERATOR - 3.5L TI-VCT , for A/C compressor REFER to AIR CONDITIONING (AC) COMPRESSOR - 3.5L TI-VCT .
CHECK THE A/C SYSTEM PRESSURE
1. Test the A/C refrigerant system. REFER to REFRIGERANT SYSTEM TESTS .
  - Does the A/C system pressure exceed specifications?
  - Yes: REFER to DTC AND SYMPTOM CHART(S) for A/C system diagnosis.
  - No: The Front End Accessory Drive (FEAD) system is operating correctly at this time. A short intermittent squeal may have occurred during engine start up and shut down or during very rapid engine acceleration and decelerations, such as Wide Open Throttle (WOT) 1-2 and 2-3 shifts or 2-3 and 3-4 back-out shifts on automatic transmissions and Wide Open Throttle (WOT) 1-2 and 2-3 shifts and any combination of rapid downshifting on manual transmissions. These unique short-term momentary events are expected, and are due to the higher system inertias required to meet the electrical and cooling demands on vehicle systems.