On-Vehicle Inspection [09/2014 - ]

INSPECT BRAKE BOOSTER ASSEMBLY

Airtightness check

Start the engine and stop it after 1 or 2 minutes. Slowly depress the brake pedal several times.

Fig 1: Inspecting Brake Booster

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

TEXT IN ILLUSTRATION

*a	Correct
*b	Incorrect
*c	1st
*d	2nd
*e	3rd

If the pedal can be depressed nearly to the floor the first time, but on the 2nd and 3rd time cannot be depressed as far, the brake booster assembly is airtight.

Depress the brake pedal while the engine is running, and stop the engine with the brake pedal depressed.
If there is no change in the pedal reserve distance while holding the pedal depressed for 30 seconds, the brake booster assembly is airtight.

Operation check
1. Depress the brake pedal several times with the ignition switch off and check that there is no change in the pedal reserve distance when the pedal is depressed.
  
  Fig 2: View Of Depressing Pedal Several Times
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Depress and hold the brake pedal, then start the engine.
  
  Fig 3: View Of Depressing And Holding Down Pedal
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If the pedal goes down slightly, operation is normal.