Description & Operation: Notes
WARNING: This page is about a different car, the 1996 Saab 900. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
See ANTI-LOCK BRAKE SAFETY PRECAUTIONS
article in the GENERAL INFORMATION section.
ABS 5.3 anti-lock brake system consists of wheel sensors and ABS hydraulic unit, which includes valve block, control module, and relays. A wheel sensor at each wheel sends signals to an ABS Electronic Control Module (ECM). Wheel sensors calculate wheel acceleration, wheel retardation, car speed, and slip. If any wheel comes near to its locking limit, ABS ECM sends signals to solenoid valves in valve block for wheel concerned. Pressure in wheel brake circuit is modulated so maximum braking force is continually transferred to road surface.
Electronic Brake-force Distribution (EBD) is a function built into the ABS ECM. It controls rear electromagnetic intake valves so optimum braking force is achieved by rear wheels.