Test NS-7A - Inspecting Idle Air Control Motor Operation
WARNING: This page is about a different car, the 1995 Jeep Wrangler and 1995 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Perform TEST NS-2A
before proceeding with this test. For connector terminal identification, see CONNECTOR IDENTIFICATION
at beginning of article. For wiring diagrams, see WIRING DIAGRAMS
at the end of this article. Perform TEST VER-1A
after each repair.
- Disconnect Idle Air Control (IAC) motor connector and ensure connector is clean and not damaged. Turn ignition on. Using scan tool, actuate IAC motor. Using scan tool in voltmeter mode, check voltage on IAC No. 3 driver circuit at IAC motor connector (Brown/White wire). If voltage is more than one volt, go to next step. If voltage is less than one volt, go to TEST NS-7B .
- Check voltage on IAC No. 1 driver circuit at IAC motor connector (Gray/Red wire). If voltage is more than one volt, go to next step. If voltage is less than one volt, go to TEST NS-7C .
- Check voltage on IAC No. 4 driver circuit at IAC motor connector (Violet/Black wire). If voltage is more than one volt, go to next step. If voltage is less than one volt, go to TEST NS-7D .
- Check voltage on IAC No. 2 driver circuit at IAC motor connector (Yellow/Black wire). If voltage is more than one volt, go to next step. If voltage is less than one volt, go to TEST NS-7E .
- 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.