Symptom
|
Suspect Area
|
Reference
|
Lower pedal or spongy pedal
|
1. Integrated Brake Actuation Unit (Air in)
|
air·bleed
|
2. AHB system (Fluid leaks)
|
replace
|
3. Piston seals in IBAU (Worn or damaged)
|
replace
|
Brake drag
|
1. Brake pedal free play (Minimum)
|
adjust
|
2. Pad or lining (Cracked or distorted)
|
replace
|
3. Piston (Stuck)
|
replace
|
4. Piston (Frozen)
|
replace
|
5. Anchor or Return spring (Inoperative)
|
replace
|
6. Master cylinder (Inoperative)
|
replace
|
7. IBAU (Inoperative)
|
replace
|
Brake pull
|
1. Piston (Sticking)
|
replace
|
2. Pad or lining (Oily)
|
replace
|
3. Piston (Frozen)
|
replace
|
4. Disc (Scored)
|
replace
|
5. Pad or lining (Cracked or distorted)
|
replace
|
Hard pedal but brake inefficient
|
1. Brake system (Fluid leaks)
|
repair
|
2. Brake system (Air in)
|
air·bleed
|
3. Pad or lining (Worn)
|
replace
|
4. Pad or lining (Cracked or distorted)
|
replace
|
5. Rear brake shoe clearance(Out of adjustment)
|
adjust
|
6. Pad or lining (Oily)
|
replace
|
7. Pad or lining (Glazed)
|
replace
|
8. Disc (Scored)
|
replace
|
9. IBAU (Inoperative)
|
replace
|
10. PSU (Inoperative)
|
replace
|
Noise from brake
|
1. Pad or lining (Cracked or distorted)
|
replace
|
2. Installation bolt (Loosen)
|
adjust
|
3. Disc (Scored)
|
replace
|
4. Sliding pin (Worn)
|
replace
|
5. Pad or lining (Dirty)
|
clean
|
6. Pad or lining (Glazed)
|
replace
|
7. Brake pad shim (Damage)
|
replace
|
Brake fades
|
1. Pad or lining (Worn)
|
replace
|
2. Master cylinder (Inoperative)
|
replace
|
Brake vibration, pulsation
|
1. Pedal free play
|
adjust
|
2. Master cylinder (Inoperative)
|
replace
|
3. Caliper (Damage)
|
replace
|
4. Master cylinder cap seal
|
replace
|
5. Damaged brake lines
|
replace
|
Heavey pedal
(Halt)
|
1. Brake pedal sticking (lack of grease)
|
repair
|
2. IBAU (Inoperative)
|
replace
|
Motor sounds and excessive time to braking when consecutive 2 or 3
times pushing brake pedal
(In the case of that accumulator pressure increase rate is under 5bar/sec
when checking sensor figures of AHB with GDS)
|
1. AHB system (air in)
|
air·bleed
|
2. PSU(Inoperative)
|
replace
|
Excessive noise when pushing brake pedal
|
1. IBAU/PSU system (air in)
|
air·bleed
|
Special service tools
