Brake Pedal: Adjustment

WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT AND ADJUST BRAKE PEDAL HEIGHT
1. Check the brake pedal height.
  Pedal height from asphalt sheet:
  
  151.8 to 161.8 mm (5.98 to 6.37 in.)
  
  Fig 1: Identifying Brake Pedal Height
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Adjust brake pedal height.
  1. Remove the stop light switch assembly (See REMOVAL ).
  2. Loosen the push rod lock nut, and adjust the brake pedal height by turning the push rod
  3. Tighten the push rod lock nut.
    Torque: 26 N*m (265 kgf*cm, 19 ft.*lbf)
  4. Install the stop light switch assembly (See INSTALLATION ).
INSPECT BRAKE PEDAL FREE PLAY
1. Stop the engine and depress the brake pedal several times until no vacuum is left in the booster
2. Press the pedal until a slight resistance is felt. Measure the distance as shown in the illustration
Pedal free play:

1.0 to 2.0 mm (0.0394 to 0.0787 in.)

If the pedal free play is not as specified, check the stop light switch clearance (See INSTALLATION ). If the stop light switch clearance is within the specified range, it is normal though brake pedal free play is not as specified.

Fig 2: Identifying Pedal Free Play
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT BRAKE PEDAL RESERVE DISTANCE
HINT:

Measure the distance at the same point used for the brake pedal height inspection.
1. Release the parking brake pedal.
2. With the engine running, depress the pedal and measure the pedal reserve distance as shown in the illustration.
  Pedal Reserve Distance from Asphalt Sheet at 490 N (50 kgf, 110 lbf):
  
  More than 110 mm (4.33 in.)
  
  If incorrect, troubleshoot the brake system (See BRAKE SYSTEM ).
  
  Fig 3: Identifying Pedal Reserve Distance
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002