Town Car V8-4.6L VIN W (1997)
fluid from entering the affected brake.
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The ABS control module then looks at that wheel again. If it is still decelerating, the ABS control module opens the normally closed outlet
valve which decreases pressure by dumping fluid to a low pressure accumulator in the pump motor.
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The pump motor then pumps the fluid in the accumulator back to the brake master cylinder. This produces moderate pulsations in the brake
pedal.
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The traction control brake pressure control valve block contains an extra set of inlet and outlet valves for traction control function. There is an
isolation valve for the rear circuit. The isolation valves close during traction control operation to allow the pump motor to build pressure to the
rear wheels rather than returning brake fluid to the brake master cylinder.
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The pump motor for ABS system and traction control contains a valve to allow fluid to be drawn from the brake master cylinder for traction
control function.
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The brake pressure control valve block, pump motor, and ABS control module are serviced separately. Other than gaskets, no internal parts
can be serviced.
