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Home >> GMC >> 1991 >> Value Van 7.4 N >> Repair and Diagnosis >> External Pages >> Different car >> Section 33 (Engine Controls - Tests W/Codes - 3.8L) >> Self-Diagnostic Tests >> Test NTC-9B - Checking Idle Air Control Motor

Test NTC-9B - Checking Idle Air Control Motor

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.

Turn engine off. Disconnect Powertrain Control Module (PCM) connector. 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 was more than 10 ohms, repair open on necessary wire. Perform TEST VER-2. If resistance for all wires was less than 10 ohms, replace PCM. Perform TEST VER-2.

PCM TERMINAL IDENTIFICATION

Terminal No. Wire Color
39 Gray/Red
40 Brown/White
59 Violet/Black
60 Yellow/Black