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Home >> GMC >> 1991 >> Value Van 7.4 N >> Repair and Diagnosis >> External Pages >> Different car >> Section 39 (Engine Controls - Tests W/Codes - 5.2L CNG) >> Self-Diagnostic Tests >> Test TC-23D - Idle Air Control Motor Circuits

Test TC-23D - Idle Air Control Motor Circuits

WARNING: This page is about a different car, the 1995 Dodge Ram Wagon, 1995 Dodge Ram Van, 1995 Dodge Pickup, and 1995 Dodge Dakota. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Inspect connector for damaged pushed-out or miswired terminals. Repair as necessary. Perform TEST VER-2.
  2. If connector is okay, using an external ohmmeter, check resistance of Gray/Red wire between IAC motor connector and PCM connector terminal No. 39. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2. If resistance is more than 5 ohms, repair open Gray/Red wire. Perform TEST VER-2.
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