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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 TC-16B - Idle Air Control Motor Circuits

Test TC-16B - Idle Air Control Motor Circuits

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.
  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 Brown/White wire between IAC motor connector and PCM connector terminal No. 40. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2. If resistance is more than 5 ohms, repair open Brown/White wire. Perform TEST VER-2.
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