Corolla Wagon L4-96.8 1587cc 1.6L DOHC (4A-FE) (1996)
Idle Speed/Throttle Actuator - Electronic: Testing and Inspection
On-Vehicle Inspection
ON-VEHICLE INSPECTION
1. INSPECT IAC VALVE OPERATION
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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
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Using SST, connect terminals TE1 and E1 of the DLC1.
SST 09843-18020
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After engine speed are kept at 900 - 1,300 rpm for 5 seconds, check that they return to idle speed. If the rpm operation is not as specified,
check the IAC valve, wiring and ECM.
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Remove the SST from the DLC1. SST 09843-18020
2. INSPECT IAC VALVE RESISTANCE
NOTICE: "Cold" and "Hot" in those sentences express the temperature of the coils themselves.
"Cold" is from -1O °C (14 °F) to 50 °C (122 °F) and
"Hot" is from 50 °C (122 °F) to 100 °C (212 °F).
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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:
Cold: 17.0 - 24.5 ohm
Hot: 21.5 - 28.5 ohm
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If resistance is not as specified, replace the IAC valve.
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Reconnect the IAC valve connector.