New Yorker V6-181 2972cc 3.0L SOHC VIN 3 FI (1989)
Sensor Block: Description and Operation
Replenishing Valve Operation
The replenishing valve is a two piston valve which is controlled by the ABCM. This valve is opened during anti-lock braking and also during hard
braking without anti-lock operation. When the replenishing valve is engaged, pressurized fluid from the booster servo circuit is redirected into the master
cylinder to prevent excessive pedal travel.
Due to the typically high fluid pressure present when the replenishing valve is activated and slight pressure differences between the servo circuit and the
master cylinder, a slight "clunk" may be felt and heard when the replenishing valve is activated. This is particularly evident during the Built-In Test
Equipment (BITE) portion of the system self test, as the replenishing valve function is checked by the ABCM.
A switch, designated SW, is opened by the replenishing valve upon activation. If switch SW fails to open upon activation of the replenishing valve, the
ABCM detects a fault and records a fault code.
