Pinpoint Test Ab: Soft Or Excessive Brake Pedal Travel
- AB1 RETRIEVE THE RECORDED DTCs FROM THE ABS SELF-TEST
- Check for recorded ABS DTCs from the self-test.
- Are any DTCs recorded?
- AB2 CHECK THE BRAKE SYSTEM COMPONENTS FOR CORRECT INSTALLATION OR DAMAGE
- Inspect the brake system for the following concerns:
- Check the brake pedal and bracket, brake master cylinder, brake calipers and fluid lines/hoses for correct installation.
- Check the brake pedal and bracket, brake master cylinder, brake calipers and fluid lines/hoses for damage or leaks.
- Check the flexible brake hoses for bulging with the brake pedal is pressed.
- For brake pedal and master cylinder, refer to
HYDRAULIC BRAKE ACTUATION
.
- For brake booster, refer to
POWER BRAKE ACTUATION
.
- Are the brake system components correctly installed and free from leaks or damage?
- Yes:
GO to AB3.
- No:
REPAIR the identified concern. TEST the system for normal operation.
- AB3 BLEED THE BRAKE SYSTEM
- Bleed the brake system including the Hydraulic Control Unit (HCU) bleeding procedure. Refer to
BRAKE SYSTEM - GENERAL INFORMATION
.
- Is the concern still present?
- Yes:
GO to AB4.
- No:
The system is operating correctly at this time. The concern may have been caused by air in the brake system.
- AB4 CHECK BRAKE MASTER CYLINDER