Scheme 1: Identifying Conventional Brake System Related Components
Scheme 1
Scheme 1: BRAKE FLUID INSPECTION
- Verify that the brake fluid level in the reserve tank is between the MAX and MIN marks. (Scheme 1): Checking Brake Fluid Level If the brake fluid level is below the MIN mark, add brake fluid.
Operation inspection
- Depress the pedal several times with the engine stopped.
- With the pedal depressed, start the engine.
- If the pedal moves down slightly immediately after engine start, the unit is normal.
Non-servo operation inspection
- If the pedal force and fluid pressure correlation is within the specification with the engine stopped and a vacuum amount of 0 kPa {0 mmHg, 0 inHg} , the system is normal. Standard power brake unit non-servo operation
| Vacuum amount at 0 kPa {0 mmHg, 0 inHg} |
|---|
| Pedal force | Fluid pressure |
| 200 N {20.4 kgf, 45.0 lbf} | 310 kPa {3.16 kgf/cm 2 , 45.0 psi} or more |
Servo operation inspection
- Start the engine and depress the brake pedal when the vacuum reaches 66.7 kPa {500 mmHg, 19.7 inHg} .
- At this time, apply the indicated pedal force and if the fluid pressure is within the specification, the unit is normal.
Standard power brake unit servo operation
| Vacuum amount at 66.7 kPa {500 mmHg, 19.7 inHg} |
|---|
| Pedal force | Fluid pressure |
| 200 N {20.4 kgf, 45.0 lbf} | 7,500 kPa {76.48 kgf/cm 2 , 1088 psi} or more |
Description
- Brake judder concern has the following 3 characteristics
