Description & Operation
WARNING:
For warnings and procedures regarding vehicles equipped with Anti-Lock Brake Systems (ABS), see appropriate ANTI-LOCK article.
Hydraulic brake system uses a tandem master cylinder with a vacuum power assist servo. Sienna is equipped with front disc brakes and rear drum brakes standard. Rear brakes are self-adjusting.
Parking brake pedal mechanically activates rear brakes. With rear drum brakes, a cable applies rear shoes.