Idle Speed/Throttle Actuator - Electronic: Testing and Inspection

IAC VALVE ON-VEHICLE INSPECTION:
1. INSPECT IAC VALVE OPERATION.
- Initial conditions:
- Engine at normal operating temperature
- Idle speed set correctly
- Transmission in neutral position




- Disconnect the IAC valve connector.
- Check the engine speed.

Engine rpm: 1,000 rpm or more

- Reconnect the IAC valve connector.
- If the rpm operation is not as specified, check the IAC valve, wiring and ECM.

2. INSPECT IAC VALVE RESISTANCE.
- Disconnect the IAC valve connector.



- Using an ohmmeter, measure the resistance between terminal +B and other terminals (RSC, RSO).

Resistance: At 20°C (68°F): 19.3 - 22.3 Ohm

- If resistance is not as specified, replace the IAC valve.
- Reconnect the IAC valve connector.

- NOTE: For further IAC valve inspection, refer to "Service and Repair" procedures.
- Service and Repair

IAC VALVE CIRCUIT INSPECTION