Eclipse L4-2.4L SOHC (2004)
Idle Speed/Throttle Actuator - Electronic: Testing and Inspection
Idle Air Control Motor (Stepper Motor) Check
IDLE AIR CONTROL MOTOR (STEPPER MOTOR) CHECK
Required Special Tool:
-
MB991709: Test Harness Set
Checking the Operation Sound
1. Check that the engine coolant temperature is 20 °C (68 °F) or below.
NOTE: If necessary, you can disconnect the engine coolant temperature sensor connector and connect the harness-side of the connector to
another engine coolant temperature sensor that is at 20 °C (68 °F) or below.
2. Check that the operation sound of the stepper motor can be heard after the ignition is switched ON (but do not start the engine).
3. If the operation sound cannot be heard, check the stepper motor's activation circuit. If the circuit is normal, it is probable that there is a
malfunction of the stepper motor or engine control module (ECM) <M/T> or powertrain control module (PCM) <A/T>.
Checking the Coil Resistance
1. Disconnect the idle air control motor connector.
2. Measure resistance between terminal No. 2 and either terminal No. 1 or terminal No. 3 of the connector at the idle air control motor side.
Standard value: 28 - 33 Ohms [at 20 °C (68 °F)]
3. If resistance is not within the standard value, replace the IAC motor.
4. Measure the resistance between terminal No. 5 and either terminal No. 6 or terminal No. 4 of the connector at the idle air control motor side.
Standard value: 28 - 33 Ohms [at 20 °C (68 °F)]
5. If resistance is not within the standard value, replace the IAC motor.
<Operation Check>
1. Remove the throttle body.
2. Remove the idle air control motor.
3. Connect special tool MB991709 to the idle air control motor connector.
