Unexpected Brake Pedal Reaction

UNEXPECTED BRAKE PEDAL REACTION

Description

A malfunction of brake pedal feel (height or others) is detected when brake pedal is depressed.


Diagnosis Procedure


1. CHECK FRONT AXLE AND REAR AXLE

Check that there is no excessive looseness in front axle and rear axle.
- Front axle: Refer to "Inspection" Inspection.
- Rear axle: Refer to "Inspection" Inspection.
Is the inspection result normal?
YES- GO TO 2.
NO- Repair or replace error-detected parts.

2. CHECK DISC ROTOR

Check the disc rotor runout.
- Front: Refer to "DISC ROTOR : Inspection and Adjustment" Front Disc Brake.
- Rear: Refer to "DISC ROTOR : Inspection and Adjustment" Rear Disc Brake.
Is the inspection result normal?
YES- GO TO 3.
NO-Refinish disc rotor.
- Front: Refer to "DISC ROTOR : Inspection and Adjustment" Front Disc Brake.
- Rear: Refer to "DISC ROTOR : Inspection and Adjustment" Rear Disc Brake.

3. CHECK BRAKE FLUID LEAKAGE

Check the brake fluid leakage.
- Front: Refer to "FRONT : Inspection" Inspection.
- Rear: Refer to "REAR : Inspection" Inspection.
Is the inspection result normal?
YES- GO TO 4.
NO- Repair or replace error-detected parts.

4. CHECK BRAKE PEDAL

Check the each item of brake pedal. Refer to "Inspection and Adjustment" Adjustments.
Is the inspection result normal?
YES- GO TO 5.
NO- Adjust each item of brake pedal. Refer to "Inspection and Adjustment" Adjustments.

5. CHECK BRAKING FORCE

Check the brake force using a brake tester.
Is the inspection result normal?
YES- GO TO 6.
NO- Check the each components of brake system.

6. CHECK BRAKE PERFORMANCE

Disconnect ABS actuator and electric unit (control unit) connector so that ABS does not operate. Check that brake force is normal in this condition. Connect harness connectors after checking.
Is the inspection result normal?
YES- Normal
NO- Check the each components of brake system.