Traction Control: Anti-Lock: Description: Notes
CAUTION:
When battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See COMPUTER RELEARN PROCEDURES
article in GENERAL INFORMATION before disconnecting battery.
CAUTION:
Some operations in this article require that hydraulic lines, hoses and fittings be disconnected for inspection testing and replacement purposes. This brake system uses a hydraulic accumulator which, when fully charged, contains brake fluid at high pressure. Before disconnecting any hydraulic lines, hoses or fittings, be sure that the accumulator is fully depressurized as described in DEPRESSURIZING HYDRAULIC ACCUMULATOR
under ON-VEHICLE SERVICING. Failure to depressurize the hydraulic accumulator may result in personal injury.
CAUTION:
The use of rubber hoses or parts other than those specified for the anti-lock brake system may lead to functional problems requiring major overhaul. Replace all components included in repair kits used to service this system. Lubricate rubber parts with clean, fresh brake fluid to ease assembly. Do not use lubricated shop air on brake parts as damage to rubber components may result. If any hydraulic component is removed or brake line disconnected, it may be necessary to bleed all or part of the brake system. The torque values specified are for dry, unlubricated fasteners.
CAUTION:
Certain components in the anti-lock brake system are not intended to be serviced individually. Attempting to remove or disconnect certain system components, such as the hydraulic accumulator and valve block, may result in personal injury and/or improper system operation. Only those components with approved removal and installation procedures in REMOVAL & INSTALLATION
should be serviced.
All vehicles are equipped with the Bosch III Anti-Lock Brake System (ABS). See Fig 1 . The purpose of the anti-lock brake system is to prevent wheel lock-up under heavy braking conditions on virtually any type of road surface. Anti-lock braking is desirable because a vehicle which is stopped without locking the wheels will normally stop in a much shorter distance than a car with wheels locked, while retaining directional stability and some steering capability. This allows the driver to retain greater control of the vehicle during heavy braking.