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Brake Warning Lamp may indicate reduced (1) Ignition on. Turn the ignition to the ON position without starting the car and wait until the Red Brake (2) Ignition off for 15 seconds. operating mode before proceeding. (4) With Shift lever in PARK, slowly depress brake pedal and release. (5) Drive vehicle a short distance. During this test drive, be sure that the vehicle achieves at least 20 mph. (6) If a functional problem with the A.B.S. system is determined while test driving a vehicle. Refer to the CAUTION: The following are general precautions that (1) If welding work is to be performed on the vehicle using an arc welder, the (CAB) should be disconnected (2) The (CAB) and hydraulic assembly 10 way con- nectors should never be connected or disconnected with (3) Some components of the ABS system are not serviced separately and must be serviced as complete (4) Always de-pressurize the Hydraulic Accu- mulator when performing any work that re- Brake fluid will damage painted surfaces. If brake fluid is spilled on any painted surfaces, wash off with DE-PRESSURIZING HYDRAULIC ACCUMULA- The ABS pump/motor assembly keeps the hydraulic accumulator charged between approximately 11,032 key is in the ON position. The pump/motor assembly Unless otherwise specified, the hydraulic accumu- lator should be de-pressurized before disassembling (1) With ignition off, or either battery cable discon- nected, pump the brake pedal a minimum of 40 times (2) When a definite increase in pedal effort is felt, pump the pedal a few additional times. This will in- WHEEL SPEED SENSOR CABLES Proper installation of wheel speed sensor cables is critical to continued ABS system operation. Be sure MECHANICAL DIAGNOSTICS AND SERVICE SPECIAL SERVICE TOOLS Some diagnostic procedures in this section require the use of special service tools. Each of these tools is DRB II DIAGNOSTIC TESTER Some of the diagnostic procedures that are ex- plained in this section require the use of the DRB II MST-6163 PRESSURE TESTER Some diagnostic procedures in this manual require the use of the MST-6163 pressure gauge and adaptor (1) De-pressurize the accumulator by pumping the brake pedal a minimum of 40 times with the ignition Ä ANTI-LOCK 10 BRAKE SYSTEM 5 - 89 |