Mitsubishi Lancer Evolution X. Manual - part 126

BASIC BRAKE SYSTEM DIAGNOSIS

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BASIC BRAKE SYSTEM

35A-9

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

AC709382AD

Backing plate

<Rear>

BASIC BRAKE SYSTEM DIAGNOSIS

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BASIC BRAKE SYSTEM

35A-10

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.27-32

 <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.

BASIC BRAKE SYSTEM DIAGNOSIS

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BASIC BRAKE SYSTEM

35A-11

STEP 8. Adjust the brake pedal.
Refer to 

P.35A-12

.

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.

INSPECTION PROCEDURE 8: Groaning, Clicking or Rattling Noise when Brakes are not Applied.

DIAGNOSIS

.

STEP 1. Check whether foreign material has entered the 
wheel covers.
Q: Is there any foreign material?

YES : Remove it. Then go to Step 5.
NO :  Go to Step 2.

STEP 2. Check for looseness of the wheel nuts.
Q: Are the wheel nuts loose?

YES : Tighten to 98 ± 10 N⋅ m (73 ± 7 ft-lb). Then go to Step 

5.

NO :  Go to Step 3.

STEP 3. Check for looseness of the caliper installation 
bolt.
Q: Is the caliper installation bolt loose?

YES : Tighten to 135 ± 15 N⋅ m (100 ± 11 ft-lb) for the front 

caliper. Tighten to 80 ± 10 N⋅ m (59 ± 7 ft-lb) for the 

rear caliper. Then go to Step 5.

NO :  Go to Step 4.

STEP 4. 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.27-32

 <Rear>.

Q: Does the measured end play exceed the limit?

YES : Replace the faulty hub assembly. Then go to Step 5.
NO :  Go to Step 5.

SPECIAL TOOLS

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BASIC BRAKE SYSTEM

35A-12

STEP 5. 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.

SPECIAL TOOLS

M1352000601526

ON-VEHICLE SERVICE

BRAKE PEDAL CHECK AND ADJUSTMENT

M1351003500737

CAUTION

Do not apply grease or lubricant to the switch and the 
switch installation section to avoid malfunction of the 
switch. In addition, do not use gloves which have grease 
on them.

.

BRAKE PEDAL HEIGHT CHECK

1. Turn up the floor carpet under the brake pedal.
2. Remove the stoplight switch (Refer to 

P.35A-24

).

3. Use a needle or similar tool to measure the dimension A in 

the figure (distance from the dash panel pad surface to the 
dash panel).

4. Measure the dimension B in the figure (distance from the 

pedal pad surface to the dash panel pad surface).

5. Make sure that the total of the dimensions A and B 

measured in Steps 2 and 3 (brake pedal height) is within the 
standard value.

Standard value (A+B): 219.8 − 227.8 mm (8.7 − 9.0 inch)

6. When the brake pedal height is not within the standard 

value, inspect the brake pedal in the following procedure.

(1) Remove the brake pedal assembly (Refer to 

P.35A-24

).

Tool

Number

Name

Use

MB992146

Booster test 
adapter

Inspection using a simplified tester

MB990964

A: MB990520

Brake tool set
A: Piston expander

Disk brake piston pushing back

MB992146

MB990964

A

B

AC505506AJ

B

A

Dash panel

Dash panel pad

Stoplight
switch