4 Runner SR5 2WD V6-3.4L (5VZ-FE) (1997)
Idle Speed/Throttle Actuator - Electronic: Component Tests and General Diagnostics
Component Inspection
INSPECT IAC VALVE OPERATION
IAC Valve Closed
(a) Connect the positive (+) lead from the battery to terminal +B and negative (-) lead to terminal RSC, and check that the valve is closed.
IAC Valve Open
(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.
On-Vehicle Inspection
ON-VEHICLE INSPECTION
1. Inspect IAC valve operation.
(a) Initial conditions:
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Engine at normal operating temperature
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Idle speed checked correctly
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Transmission in neutral position
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A/C switch OFF
(b) Using SST connect terminals TE1 and E1 of the DLC1. SST 09843-18020
(c) After engine speed is kept at approx. 1,000 rpm for 5 seconds, check that it returns to idle speed.
If the engine speed operation is not as specified, check the IAC valve, wiring and ECM.
(d) Remove the SST from the DLC1. SST09843-18020