For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
DEFINITION: The following items are indications of chirping:

• | A high pitched noise that is heard once per revolution of the drive belt or a pulley.

• | It usually occurs on cold damp mornings.

• | Verify the condition by spraying water on the belt. The noise should stop momentarily.

1 | Check for misalignment of the pulleys. Are any of the pulleys misaligned? | Go to Step | Go to Step 3
2 | Replace any misaligned pulleys. Is the chirp still present? | Go to Step 3 | System OK
3 | Check for bent or cracked brackets. Are there any bent or cracked brackets? | Go to Step 4 | Go to Step 5
4 | Replace any bent or cracked brackets. Is the chirp still present? | Go to Step 5 | System OK
5 | Check for any loose or missing fasteners. Are there any loose or missing fasteners? | Go to Step 6 | Go to Step 7
6 | Tighten any loose fasteners. Replace any missing fasteners. Refer to Fastener Tightening Specifications Is the chirp still present? | Go to Step 7 | System OK
7 | Check for a bent pulley flange. Is there a bent pulley flange? | Go to Step 8 | Go to Step 9
8 | Replace the pulley. Is the chirp still present? | Go to Step 9 | System OK
9 | Check for severe pilling, exceeding 1/3 of the belt groove depth. Is there severe pilling? | Go to Step 10 | --
10 | Replace the drive belt. Refer to Drive Belt Replacement | -- | System OK