Tacoma 4WD L4-2.7L (3RZ-FE) (2004)
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Idle Up Control Valve: Testing and Inspection
AIR CONTROL VALVE
INSPECTION
1. TURN AIR CONDITIONING SWITCH OFF
2. CHECK IDLE-UP
a. Start engine and run it at idle.
b. Fully turn the steering wheel.
c. Check that the engine speeds decreases when the vacuum hose of the air control valve is pinched.
d. Check that the engine speeds increases when the hose is released.