Idle Speed/Throttle Actuator - Electronic: Testing and Inspection

Coil Resistance Check

IAC Motor Check:

1. Disconnect the idle air control motor connector.

2. Measure the resistance between terminal 1 and terminal 4 of the connector at the idle air control motor side.

Standard value: 38 - 52 ohms [at 20 °C (68 °F)]

If resistance is not within the standard value, replace the IAC motor.

IAC Motor Check:

3. Measure the resistance between terminal 2 and terminal 3 of the connector at the idle air control motor side.

Standard value: 38 - 52 ohms [at 20 °C (68 °F)]

If resistance is not within the standard value, replace the IAC motor.