4 Runner 4WD V6-180.5 2959cc 3.0L SOHC (3VZ-E) (1989)
Vacuum Brake Booster: Testing and Inspection
Operating Check
Fig. 2 Exploded View Of Master Cylinder. Typical
1.
Depress brake pedal several times with engine stopped, and ensure that pedal reserve distance has no change, Fig. 2.
2.
Depress brake pedal and start engine. If pedal drops slightly, operation is normal.