Test NTC-9B - Checking Idle Air Control Motor

WARNING: This page is about a different car, the 1995 Dodge Pickup and 1995 Dodge Cab & Chassis. 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.

Turn engine off. Disconnect Powertrain Control Module (PCM) connector. Using scan tool in ohmmeter mode, check resistance of each Idle Air Control (IAC) motor connector wire. If resistance on any wire is less than 5 ohms, repair appropriate wire for short to ground. Perform TEST VER-2. If resistance is more than 5 ohms on all wires, go to next step.
Using an external ohmmeter, check resistance of each wire between Idle Air Control (IAC) motor connector and PCM connector. See PCM TERMINAL IDENTIFICATION table. If resistance for any wire is more than 5 ohms, repair open on appropriate wire. Perform TEST VER-2. If resistance for all wires is less than 5 ohms, replace PCM. Perform TEST VER-2.

PCM TERMINAL IDENTIFICATION

Driver No.	Wire Color	PCM Terminal No.
1	BRN/WHT	40
2	YEL/BLK	60
3	GRY/RED	39
4	VIO/BLK	59