4 Runner 4WD V8-4.7L (2UZ-FE) (2003)
Brake Master Cylinder: Testing and Inspection
BRAKE MASTER CYLINDER SUB-ASSY
ON-VEHICLE INSPECTION
1. CHECK BRAKE MASTER CYLINDER FLUID PRESSURE CHANGE
a. Inspect the battery positive voltage.
Battery positive voltage: 10 - 14 V
b. Turn the ignition switch to OFF and depress the brake pedal more than 40 times.
HINT: When a pressure in power supply system is released, reaction force becomes lighter and stroke becomes longer.
c. Install LSPV gauge (SST) and brake pedal effort gauge, bleed air.
SST 09709-29018
d. When booster does not operate: Depress the brake pedal and check fluid pressure.
At 245 N (25 kgf, 55 lbs.)
At 343 N (35 kgf, 77 lbs.)
e. When booster operate: Depress the brake pedal and check fluid pressure.
1. Turn the ignition switch to ON and wait until the pump motor has stopped.
2. Depress the brake pedal and check fluid pressure.
At 49 N (5 kgf, 11 lbs.)