Brakes and Traction Control: Description and Operation
Brake SystemVehicles equipped with anti-lock brake system (ABS) and ABS/traction control do not use a proportioning valve. Hydraulic pressure to the brake assemblies is controlled by the hydraulic control unit (HCU) as directed by the electronic control unit (ECU). Non-ABS station wagons use 4-wheel disc brakes and are equipped with a proportioning valve in the engine compartment. Non-ABS sedans use drum brakes in the rear and are equipped with a junction block in the engine compartment and a brake load sensing-proportioning valve in the rear. During braking, weight is shifted to the front of the vehicle, causing the rear to rise. The brake load sensing-proportioning valve is mounted on the body and is attached to the rear suspension lower control arm. As the body and suspension separate, the valve proportions pressure to the rear wheels to prevent premature rear brake lock-up.
Sedan-With 4-Wheel Anti-lock Brake system (4WABS)
Station Wagon-Without 4WABS
Sedan-Without 4WABS
Brake Fluid
WARNING: Use of any other than approved DOT 3 brake fluid will cause permanent damage to brake components and will render the brakes inoperative. Failure to follow these instructions may result in personal injury.
WARNING: Brake fluid contains polyglycol ethers and polyglycols. Avoid contact with eyes. Wash hands thoroughly after handling. If brake fluid contacts eyes, flush eyes with running water for 15 minutes. Get medical attention if irritation persists. If taken internally, drink water and induce vomiting. Get medical attention immediately. Failure to follow these instructions may result in personal injury.
CAUTION: Brake fluid is harmful to painted or plastic surfaces. If brake fluid is spilled onto a painted or plastic surface, immediately wash it with water.
Use clean, fresh DOT 3 motor vehicle brake fluid.
^ Do not reuse brake fluid drained or bled from the system.
^ Do not use brake fluid that has been stored in an open container.
^ Do not use contaminated brake fluid.