Tacoma 2WD V6-3.4L (5VZ-FE) (1995)
Idle Speed/Throttle Actuator - Electronic: Testing and Inspection
Off-Vehicle Inspection
INSPECT IAC VALVE OPERATION.
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Connect the positive (+) lead from the battery to terminal +B and negative (-) lead to terminal RSC, and check that the valve is closed.
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Connect the positive (+) lead from the battery to terminal +B and negative (-) lead to terminal RSO, and check that the valve is open.
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If operation is not as specified, replace the IAC valve.