BUILD/DECAY VALVES

Open, allowing release of fluid pressure through decay valve to the fluid reservoir. Which gets pumped into the accumulator for the build pressure cycle (Fig. 3).

ABS BRAKE SYSTEM DIAGNOSIS

GENERAL INFORMATION

WARNING: SOME OPERATIONS IN THIS SECTION REQUIRE THAT HYDRAULIC TUBES, HOSES AND FITTINGS BE DISCONNECTED FOR INSPECTION OR TESTING PURPOSES.

CAUTION: REVIEW THIS ENTIRE SECTION PRIOR TO PERFORMING ANY MECHANICAL WORK ON A VEHICLE EQUIPPED WITH THE BENDIX ANTI-LOCK 6 BRAKE SYSTEM. THIS SECTION CONTAINS THE INFORMATION ON PRECAUTIONS PERTAINING TO POTENTIAL COMPONENT DAMAGE, VEHICLE DAMAGE AND PERSONAL INJURY WHICH COULD RESULT WHEN SERVICING AN ABS EQUIPPED VEHICLE.

CAUTION: Certain components of the Anti-Lock Brake System (ABS) are not intended to be serviced

individually. Attempting to remove or disconnect certain system components, may result in personal injury and/or improper system operation. Only those components with approved removal and installation procedures in this manual should be serviced.

This section contains information necessary for diagnosis of mechanical conditions which can affect the operation of the Bendix Anti-Lock 6 Brake System. Specifically, this section should be used to help diagnose mechanical conditions which result in any of the following:

(1)Anti-Lock Warning Lamp turned on.

(2)Brakes Lock on Hard Application.

Diagnosis of conditions which are obviously mechanical in nature. Such as brake noise, brake pulsation, lack of power assist, turning on of the Red Brake Warning Lamp or vehicle vibration during normal braking. Should be directed to Group 5 Brakes in this service manual. This also pertains to problems involving the parking brake system.

In order to effectively diagnose an Anti-Lock Brake System (ABS) condition. It is important to read AntiLock Brake System Description. And to follow the diagnostic procedures outlined in this section.

Many conditions that generate customer complaints may be normal operating conditions, but are