Tacoma PreRunner Extra Cab 2WD V6-3.4L (5VZ-FE) (2000)
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Idle Air Control Valve: Testing and Inspection
Component Inspection
INSPECT IAC VALVE OPERATION
a. Connect the positive (+) lead from the battery to terminal +B and negative (-) lead to terminal RSC, and check that the valve is closed.
b. Connect the positive (+) lead from the battery to terminal +B and negative (-) lead to terminal RSO, and check that the valve is open.
If operation is not as specified, replace the IAC valve.