Mitsubishi Evolution X. Manual - part 820

BASIC BRAKE SYSTEM DIAGNOSIS

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BASIC BRAKE SYSTEM

35A-7

INSPECTION PROCEDURE 4: Brake Drag

DIAGNOSIS

STEP 1. Check the parking brake operating lever return.

AC709382

Parking brake 
operating lever

AB

Q: Is the operation faulty?

YES : Repair it. Then go to Step 7.
NO :  Go to Step 2.

STEP 2. Check the shoe-to-anchor springs and adjusting 
wheel spring for breakage.

AC709382

Shoe-to-anchor 
springs

Adjusting wheel spring

AC

Q: Are the shoe-to-anchor springs and adjusting wheel 

spring broken?
YES : Replace the spring. Then go to Step 7.
NO :  Go to Step 3.

STEP 3. Check the amount of grease at each sliding 
section.
Refer to GROUP 36, Parking Brake Lining and Drum 

P.36-17

.

Q: Is the grease amount low?

YES : Apply grease. Then go to Step 7.
NO :  Go to Step 4.

STEP 4. Check the parking brake pull amount.
Refer to GROUP 36, On-vehicle Service 

− Parking Brake lever 

Stroke Check and Adjustment 

P.36-11

.

Q: Is there a fault?

YES : Adjust it. Then go to Step 7.
NO :  Go to Step 5.

STEP 5. Check port for clogging.
Q: Is the port clogged?

YES : Repair it. Then go to Step 7.
NO :  Go to Step 6.

BASIC BRAKE SYSTEM DIAGNOSIS

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BASIC BRAKE SYSTEM

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STEP 6. Check disk brake pistons for sticking.
Depress the brake pedal, then release. Confirm each wheel 
spins freely.
Q: Does any wheel stick?

YES : Inspect that brake assembly. Then go to Step 7.
NO :  Go to Step 7.

STEP 7. 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.

INSPECTION PROCEDURE 5: Scraping or Grinding Noise when Brakes are Applied

DIAGNOSIS

STEP 1. Check the front brakes, then rear brakes, for 
metal-to-metal condition.
Q: Is any metal-to-metal contact evident?

YES : Repair or replace the components. Then go to Step 6.
NO :  Go to Step 2.

STEP 2. Check for interference between the caliper and 
wheel.
Q: Is there any interference?

YES : Repair or replace the part. Then go to Step 6.
NO :  Go to Step 3.

STEP 3. Check for interference between the dust cover and 
brake disk.
Q: Is there any interference?

YES : Repair or replace the part. Then go to Step 6.
NO :  Go to Step 4.

STEP 4. Check the brake drums or disks for cracks.
Q: Are there cracks?

YES : Repair or replace the part. Then go to Step 6.
NO :  Go to Step 5.

BASIC BRAKE SYSTEM DIAGNOSIS

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BASIC BRAKE SYSTEM

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STEP 5. Check for bent backing plate(s).

AC709382AD

Backing plate

<Rear>

Q: Is (Are) the backing plate(s) bent?

YES : Repair or replace the part. Then go to Step 6.
NO :  Go to Step 6.

STEP 6. 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.

INSPECTION PROCEDURE 6: Squealing, Groaning or Chattering Noise when Brakes are Applied

DIAGNOSIS

STEP 1. Check the brake disk and pads for wear 
or cutting.

Q: Is there wear or cutting?

YES : 

Repair or replace the part. Then go to Step 

4.

NO : 

Go to Step 2.

STEP 2. Check the calipers for rust.

Q: Is there any rust?

YES : 

Remove the rust. Then go to Step 4.

NO : 

Go to Step 3.

STEP 3. Adjust the brake pedal.
Refer to 

P.35A-12

.

Q: Is the brake pedal adjusted correctly?

YES : 

Go to Step 4.

NO : 

Adjust the brake pedal. Then go to Step 4.

STEP 4. 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.

BASIC BRAKE SYSTEM DIAGNOSIS

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BASIC BRAKE SYSTEM

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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.
Refer to GROUP 26 

− On-vehicle Service, Wheel bearing end 

play check 

P.26-7

 <Front> or GROUP 27 

− On-vehicle Service, 

Wheel bearing end play check 

P.27-33

 <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.