Sable V6-183 3.0L DOHC VIN S MFI (1997)
Electronic Brake Control Module: Description and Operation
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The anti-lock brake control module is mounted on the hydraulic control unit located in the front of the engine compartment on the LH side of the
vehicle.
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The anti-lock brake control module operates as follows:
^ If the anti-lock brake control module senses that a wheel is about to lock, the anti-lock brake control module activates the appropriate inlet valve in
the brake pressure control valve block, which closes that valve. This prevents any more fluid from entering the affected brake.
^ The anti-lock brake control module then looks at the wheel again. If it is still decelerating, the anti-lock brake control module opens the normally
closed outlet valve in the brake pressure control valve block, which decreases the pressure trapped in the line.
^ Impending wheel lock conditions trigger signals from the anti-lock brake control module that open and close the appropriate solenoid valves in the
brake pressure control valve block. This results in moderate pulsations in the brake pedal (2455).
^ During normal braking, the brake pedal feel will be identical to a standard brake system.
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Most malfunctions which occur in the anti-lock brake system will store a diagnostic trouble code (DTC) in the keep-alive random access memory of
the anti-lock brake control module.
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The DTCs can be retrieved following the on-board diagnostic procedures
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Power is provided to the anti-lock brake control module through three separate fused lines for electronic logic control, hydraulic pump motor and
solenoid valves.
ABS CONTROL MODULE SIGNALS
Signal inputs to the anti-lock brake control module are:
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battery positive voltage (B +).
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front brake anti-lock sensors and rear brake anti-lock sensor signals.
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stoplight switch brake on/off signal.
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diagnostic data link.
Signal outputs are:
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instrument cluster ABS indicator.
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diagnostic data link.
