DEFINITION: A low pitch tapping noise caused by drive belt misalignment or a low frequency noise heard once per revolution of the drive belt. This noise occurs on cold start-up at idle.

Check for severe pilling.

Is there severe pilling of more than 1/3 of the rib depth?

Go to Step 2

System OK

Clean the drive belt pulleys.

Is the repair complete?

System OK

Go to Step 3

Install a new drive belt. Refer to Drive Belt Replacement .

Is the repair complete?

System OK

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