Question

abs units use a(n) ________ in the abs unit to prevent brake pedal pulsations during abs operation.
a. positive crankcase ventilation valve
b. expansion valve
c. low - pressure valve
d. isolator valve

Explanation:

The isolator valve in an ABS unit helps prevent brake - pedal pulsations during ABS operation. The positive crankcase ventilation valve is related to engine emissions, the expansion valve is used in refrigeration systems, and the low - pressure valve is not related to preventing brake - pedal pulsations in ABS.

Answer:

D. isolator valve