For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
DEFINITION: The vibration is engine-speed related. The vibration may be sensitive to accessory load.
1 | Check the drive belt for wear, damage, debris build-up and missing belt ribs. Is the belt worn or damaged? | Go to Step 2 | Go to Step 3
2 | Replace as necessary. Refer to Drive Belt Replacement. Is the repair complete? | Go to Step 3 | --
3 | Check for loose or missing fasteners. Are there loose or missing fasteners? | Go to Step 4 | Go to Step 5
4 | Re-tighten or replace as necessary. Is the repair complete? | System OK | --
5 | Check for damaged or bent drive pulleys. Are there damaged or drive drive pulleys? | Go to Step 6 | Go to Step 7
6 | Repair or replace as necessary. Is the repair complete? | System OK | --
7 | Check for proper tensioner operation. Refer to Drive Belt Tensioner Diagnosis. Is the drive belt tensioner operating properly? | Go to Step 9 | Go to Step 8
8 | Replace as necessary. Refer to Drive Belt Replacement. Is the repair complete? | System OK | --
9 | Check for loose, bent or cracked brackets. Are there loose, bent or cracked brackets? | Go to Step 10 | System OK
10 | Repair or replace the brackets as necessary. Is the repair complete? | System OK | --