Honda - Accord Prelude 1996 2000

General Information


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Fig. The ABS computer uses information from the wheel speed sensors to determine the maximum possible braking on any type of road surface

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Fig. ABS system component locations-Prelude shown, Accord similar

When conventional brakes are applied in an emergency stop or on ice, one or more wheels may lock. This may result in loss of steering control and vehicle stability. The purpose of the Anti-lock Brake System (ABS) is to prevent lock up when traction is marginal or under heavy braking conditions. This system offers many benefits allowing the driver increased safety and control during braking. Anti-lock braking operates only at speeds above 3 mph (5 km/h).

Under normal braking conditions, the ABS functions the same as a standard brake system with a diagonally split master cylinder and conventional vacuum assist.

If wheel lock is detected during the brake application, the system will enter anti-lock mode. During anti-lock mode, hydraulic pressure in the four wheel circuits is modulated to prevent any one wheel from locking. Each wheel circuit is designed with a set of electrical valves and hydraulic line to provide modulation, although for vehicle stability, both rear wheel valves receive the same electrical signal. The system can build or reduce pressure at each wheel, depending on signals generated by the Wheel Speed Sensors (WSS) at each wheel and received at the Controller Anti-lock Brake (CAB).

Anti-lock Braking Systems (ABS) are available on all Honda models. When this system engages, some audible noise as well as pulses in the brake pedal may occur. Do not be alarmed; this is normal system operation.


Failure to observe the following precautions may result in system damage:

Before performing electric arc welding on the vehicle, disconnect the control module and the hydraulic unit connectors.
When performing painting work on the vehicle, do not expose the control module to temperatures in excess of 185°F (85°C) for longer than 2 hours. The system may be exposed to temperatures up to 200°F (95°C) for less than 15 minutes.
Never disconnect or connect the control module or hydraulic modulator connectors with the ignition switch ON .
Never disassemble any component of the Anti-Lock Brake System (ABS) which is designated unserviceable; the component must be replaced as an assembly.
When filling the master cylinder, always use brake fluid which meets DOT-3 specifications; petroleum-based fluid will destroy the rubber parts.
Working on ABS system requires extreme amount of mechanical ability, training and special tools. If you are not familiar, have your vehicle repaired by a certified mechanic.