Test NS-7A - Inspecting Idle Air Control Motor Operation
WARNING: This page is about a different car, the 1995 Plymouth Voyager, 1995 Plymouth Grand Voyager, 1995 Dodge Grand Caravan, 1995 Dodge Caravan, and 1995 Chrysler Town & Country. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
For circuit and connector terminal identification, see CONNECTOR IDENTIFICATION
. For wiring diagrams, see WIRING DIAGRAMS
section at the end of this article.
- Disconnect Idle Air Control (IAC) motor connector. Turn ignition on. Using scan tool, actuate IAC motor. Using scan tool in voltmeter mode, check voltage on IAC motor connector driver No. 3 circuit (Gray/Red wire). If voltage is less than one volt, go to TEST NS-7B . If voltage is more than one volt, go to next step.
- Check voltage on IAC motor connector driver No. 1 circuit (Brown/White wire). If voltage is less than one volt, go to TEST NS-7C . If voltage is more than one volt, check voltage on IAC motor connector driver No. 4 circuit (Violet/Black wire).
- If voltage is less than one volt, go to TEST NS-7D . If voltage is more than one volt, check voltage on IAC motor connector driver No. 2 circuit (Yellow/Black wire). If voltage is less than one volt, go to TEST NS-7E . If voltage is more than one volt, go to next step.
- Turn ignition off. Remove IAC motor from throttle body. Reconnect IAC motor connector. Using scan tool, actuate IAC motor. If IAC motor tip moves in and out, go to TEST NS-8A . If IAC motor tip does not move in and out, replace IAC motor. Perform TEST VER-1.