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DIAGNOSIS AND TESTING ANTILOCK BRAKES The ABS brake system performs several self-tests every time the ignition switch is turned on and the NOTE: An audible noise may be heard during the NOTE: The MDS or DRB III scan tool is used to SERVICE PROCEDURES BLEEDING ABS BRAKE SYSTEM ABS system bleeding requires conventional bleed- ing methods plus use of the DRB scan tool. The pro- (1) Perform base brake bleeding. Refer to base brake section for procedure. (2) Connect scan tool to the Data Link Connector. (3) Select ANTILOCK BRAKES, followed by MIS- CELLANEOUS, then ABS BRAKES. Follow the (4) Perform base brake bleeding a second time. Refer to base brake section for procedure. (5) Top off master cylinder fluid level and verify proper brake operation before moving vehicle. REMOVAL AND INSTALLATION HYDRAULIC CONTROL UNIT/CONTROLLER REMOVAL (1) Remove negative battery cable from the bat- tery. (2) Pull up on the CAB harness connector release (Fig. 4) and remove connector. (3) Remove brake lines from the HCU. (Fig. 5) and remove HCU/CAB. INSTALLATION (1) Install HCU/CAB on the mounting studs. N·m (102 in. lbs.). (3) Install brake lines to the HCU and tighten to 19 N·m (170 in. lbs.). (4) Install wiring harness connector to the CAB and push down on the release to secure the connec- (5) Install negative battery cable to the battery. Fig. 3 G-Switch 1 – SWITCH PART NUMBER MOUNTING Fig. 4 CAB Harness Connector Release 1 – CAB 5 - 36 BRAKES XJ DESCRIPTION AND OPERATION (Continued) |