General System Description
ANTI-LOCK BRAKINGThe new anti-lock braking system is identical in operation to the 1989 XJ-S system. This eliminates the power hydraulic booster system. In the Sedan Range, the system is more compact in that the motor) pump, reservoir, and the hydraulic actuation unit are all integrated on the brake pedal and accelerator housing. The system combines normal operation, power boost, and anti-lock braking. The previous power hydraulic booster arrangement has been eliminated.
ABS Components:
Anti-lock unit
The anti-lock unit integrates the motor, pump, reservoir, and the hydraulic actuation unit on the brake pedal and accelerator housing. A steel pipe connects the motor-pump unit to the hydraulic actuation unit.
Anti-lock warning
The BRAKE WARNING and ABS WARNING lights operate in the opposite order to those in the XJ-S. During system charging, the ABS WARNING goes off first, then the BRAKE WARNING. The reason for this sequence is that the ABS WARNING goes off at 9515 bar, and the BRAKE WARNING goes off at 10514 bar. The warning light blink fault codes are the same as for the XJ-S.
Discs and calipers
The previous Girling discs, calipers, and parking brakes have been replaced by a Teves system [the anti-lock system manufacturer. These components complement the anti-lock system and feature brake discs with increased thickness to improve thermal capacity and reduce the possibility of brake fade. Pad wear sensors are incorporated into two of the four pad sets; one at the left front wheel and one at the right rear wheel.