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Home >> GMC >> 1991 >> Value Van 7.4 N >> Repair and Diagnosis >> External Pages >> Different car >> Section 24 (Engine Controls - Tests W/Codes - 2.5L) >> 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 Dodge Dakota. 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 DIAGRAM  section.

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 is more than 5 ohms, repair appropriate open wire. Perform TEST VER-2. If resistance for each wire is less than 5 ohms, replace PCM. Perform TEST VER-2.

PCM TERMINAL IDENTIFICATION

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