T100 Pickup 4WD V6-180.5 2959cc 3.0L SOHC (3VZ-E) (1993)
Check Valve: Description and Operation
PURPOSE
The Pulsed Secondary Air Injection (PAIR) Check Valve is used to keep vacuum flow in only one direction, blocking vacuum signals from the
PAIR Valve under certain conditions.
OPERATION
The PAIR Check Valve uses a spring and check ball to allow air to flow in one direction only.
