BRAKE BOOSTER (for RHD) ON-VEHICLE INSPECTION

INSPECT BRAKE BOOSTER ASSEMBLY
1. Check the air tightness.
  1. Start the engine and stop it after 1 or 2 minutes. Depress the brake pedal several times slowly.
    Tech Tips
    
    If the pedal can be depressed to the floor on the 1st time, but cannot be depressed as far on the 2nd or 3rd times, the booster is airtight. If not, inspect the vacuum check valve.
    
    If the vacuum check valve is normal, replace the brake booster assembly.
  2. Depress the brake pedal while the engine is running, and stop the engine with the pedal depressed.
    Tech Tips
    
    If there is no change in the pedal reserve distance after holding the pedal for 30 seconds, the booster is airtight. If not, inspect the vacuum check valve.
    
    If the vacuum check valve is normal, replace the brake booster assembly.
2. Check the operation.
  1. Depress the brake pedal several times with the ignition switch at OFF and check that there is no change in the pedal reserve distance.
  2. Depress the brake pedal and start the engine.
    
    Tech Tips
    
    If the pedal goes down slightly, the operation is normal. If not, inspect the vacuum check valve.
    
    If the vacuum check valve is normal, replace the brake booster assembly.
INSPECT VACUUM CHECK VALVE (for 1KR-FE)
1. Check the vacuum check valve.
  1. Remove the vacuum hose assembly.
  2. Check that there is ventilation from the booster to the engine, and no ventilation from the engine to the booster.
    
    If any fault is found, replace the vacuum hose assembly.
  3. Install the vacuum hose assembly.
INSPECT VACUUM CHECK VALVE (for 2WZ-TV)
1. Check the vacuum check valve.
  1. Remove the vacuum hose assembly.
  2. Check that there is ventilation from the booster to the engine, and no ventilation from the engine to the booster.
    
    If any fault is found, replace the vacuum hose assembly.
  3. Install the vacuum hose assembly.