Inspection Procedure 7

INSPECTION PROCEDURE 7: Squealing Noise when Brakes are not Applied

DIAGNOSIS

STEP 1. Check whether the backing plate is bent or loose and interfering with the drum.

Q. Is there a fault?

YES Replace the part. Then go to Step 9.
NO Go to Step 2.
STEP 2. Check whether the drum is damaged due to interference with the backing plate or shoe.

Q. Is there any damage?

YES Replace the part. Then go to Step 9.
NO Go to Step 3.
STEP 3. Check the brake drum for wear and the shoe spring for damage.

Q. Is there any wear or damage?

YES Replace the part. Then go to Step 9.
NO Go to Step 4.
STEP 4. Check the brake disks for rust.

Q. Are the brake disks rusted?

YES Remove the rust by using sand paper. If still rusted, turn the rotors with an on-the-car brake lathe. Then go to Step 9.
NO Go to Step 5.
STEP 5. Check the brake pads for correct installation.

Q. Are the pads installed incorrectly?

YES Repair the pads. Then go to Step 9.
NO Go to Step 6.
STEP 6. Check the calipers for correct installation.

Q. Are the calipers installed incorrectly?

YES Repair the calipers. Then go to Step 9.
NO Go to Step 7.
STEP 7. Check the wheel bearings for end play.

Front Axle [Front] or On-vehicle Service, Wheel bearing end play check Rear Axle [Rear].

Q. Does the measured end play exceed the limit?

YES Replace the faulty hub assembly. Then go to Step 9.
NO Go to Step 8.
STEP 8. Adjust the brake pedal.

Refer to Brake Pedal Inspection.

Q. Is the brake pedal adjusted correctly?

YES Go to Step 9.
NO Adjust the brake pedal. Then go to Step 9.
STEP 9. Recheck symptom.

Q. Is the symptom eliminated?

YES The procedure is complete.
NO Start over at step 1. If a new symptom surfaces, refer to the symptom chart.