Idle Speed/Throttle Actuator - Electronic: Testing and Inspection

INSPECTION








Actuator Inspection

1. Turn the Ignition Switch OFF.
2. Disconnect the Idle Speed Control Motor connector.





3. Check for a open, or short circuit of the Idle Speed Control Motor coil as shown on illustration.





4. Connect 6 volt DC between terminal 1 and terminal 2 of the Idle Speed Control Motor connector, and check to be sure that the Idle Speed Control Motor operates.

CAUTION: When suppling 6V DC to Idle Speed Control Motor connector, the wrong direction of current can cause the locking of Idle Speed Control Motor. The illustration shows the correct direction of current according to the position of Idle Speed Control Motor.

5. If the Idle Speed Control Motor is operated it is normal, and if the Idle Speed Control Motor is not operated it may be locked. The following shows how to release the locked Idle Speed Control Motor;





- Key off.
- Disconnect the Idle Speed Control Motor connector.
- Supply the 9V DC pulse to Idle Speed Control Motor side connector.

Pulse width/Frequency: 50 ms/5 Hz.





NOTE: Before the 9V DC pulse is supplied, first confirm the position of Idle Speed Control Motor plunger, and then decide the direction of current according to the Illustration.

Harness Inspection Procedure





1. Check for an open-circuit, or a short-circuit to ground between the Engine Control Module and the Idle Speed Control Motor.

If OK - END.
If not OK - Repair the harness. (H 2 - C50-4 10) (H 1 - C50-4 23)

Troubleshooting Hints
In case irregular idling or engine stall is caused but the causes cannot be determined, turn ON the Ignition Switch for 15 seconds or more. Then disconnect the motor connector. This facilitates troubleshooting. If necessary, turn the idle speed control adjusting screw to adjust the engine.