T100 Pickup 2WD L4-164.4 2693cc 2.7L DOHC (3RZ-FE) (1995)
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Idle Speed/Throttle Actuator - Electronic: Testing and Inspection
On-Vehicle Inspection
1. INSPECT IDLE AIR CONTROL (IAC) VALVE OPERATION.
Initial conditions:
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Engine at normal operating temperature.
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Idle speed set correctly.
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Transmission in neutral range.
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Using SST 09843-18020 or equivalent, connect terminals TE1 and E1 of the DLC 1.
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After engine rpm is kept at 1,000 - 1,500 rpm for 5 seconds, check that it returns to idle speed. If the rpm operation is not as specified, check
the IAC valve, wiring and ECU.
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Remove SST.
2. INSPECT IAC VALVE RESISTANCE.
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Disconnect the IAC valve connector.
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Using an ohmmeter, measure the resistance between terminal +B and other terminals (RSC, RSO).
Resistance: 19.3 - 22.3 Ohms
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If resistance is not as specified, replace the IAC valve.
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Reconnect the IAC valve connector.