Component Tests

Vibration When Brakes Are Applied
For vibration concerns when brakes are applied, perform the following procedure.
Visually inspect:
^ Tire condition and pressure.
^ Suspension bushings and ball joints.
Correct as necessary.

1. Verify and isolate the concern. Brake roughness can be felt in:
^ the steering wheel
^ the seat
^ the brake pedal
2. After verifying the concern, check for related concerns in the:
^ Technical Service Bulletins
3. Check wheel bearing end-play and correct as necessary.

4. NOTE: Begin at the front of the vehicle unless the vibration has been isolated to the rear.

Remove the tire and wheel.
5. Remove the brake caliper.
6. Measure and record the brake disc thickness. Install a new brake disc if the brake disc thickness is less than 0.60 mm (0.024 inch) above the minimum thickness specification. This will make sure that the brake disc thickness will be above minimum thickness after it has been machined.
7. For vehicles with a two-piece hub and brake disc assembly:
^ Match-mark before disassembly.
^ Remove the brake disc.
^ Using a die grinder with a mild abrasive (Scotch Brite[r] type), remove any rust or corrosion from the hub and brake disc mounting surfaces.
^ Align the match-marks and reinstall the brake disc on the hub.

8. CAUTION: Do not use a bench lathe to machine brake discs.

NOTE: The depth of cut must be between 0.10 and 0.20 mm (0.004 and 0.008 inch). Lighter cuts will cause heat and wear. Heavier cuts will cause poor brake disc surface finish.

Using the special tool, machine the brake discs. Follow the manufacturer's instructions. After machining, make sure the brake disc still meets the thickness specification.
9. Using a dial indicator, verify that the brake disc lateral runout is now within specification.
10. Remove the special tool hub adapter.
11. Remove any remaining metal chips from the machining operation.
12. For vehicles with a two-piece hub and brake disc assembly:
^ Remove the brake disc from the hub.
^ Remove any remaining metal chips from hub and brake disc mounting surfaces and from the ABS sensor.
^ Apply anti-seize lubricant to the mounting surfaces.
^ Using the match marks, mount the brake disc on the hub.
13. Install the caliper and check brake operation.