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?
1. YES: Replace the part. Then go to Step 8.
2. 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?
1. YES: Replace the part. Then go to Step 8.
2. 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?
1. YES: Replace the part. Then go to Step 8.
2. NO: Go to Step 4.
STEP 4. Check the brake disks for rust.
Q: Are the brake disks rusted?
1. 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 8.
2. NO: Go to Step 5.
STEP 5. Check the brake pads for correct installation.
Q: Are the pads installed incorrectly?
1. YES: Install the pads correctly. Then go to Step 8.
2. NO: Go to Step 6.
STEP 6. Check the calipers for correct installation.
Q: Are the calipers installed incorrectly?
1. YES: Install the calipers correctly. Then go to Step 8.
2. NO: Go to Step 7.
STEP 7. Check the wheel bearings for end play.
Refer to WHEEL BEARING PLAY CHECK <Front>, WHEEL BEARING END PLAY CHECK <Rear (FWD)> or WHEEL BEARING END PLAY CHECK <Rear (AWD)>.

Q: Does the measured end play exceed the limit?
1. YES: Replace the faulty hub assembly (Refer to DISASSEMBLY AND ASSEMBLY <Front>, REAR AXLE HUB ASSEMBLY <Rear (FWD)> or REAR AXLE HUB ASSEMBLY <Rear (AWD)>). Then go to Step 8.
2. NO: Go to Step 8.
STEP 8. Recheck symptom.
Q: Is the symptom eliminated?
1. YES: The procedure is complete.
2. NO: Start over at step 1. If a new symptom surfaces, refer to the SYMPTOM CHART .