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Home >> GMC >> 1991 >> Value Van 7.4 N >> Repair and Diagnosis >> External Pages >> Different car >> Section 37 (Engine Controls - Tests W/Codes - 5.2L Gasoline) >> Self-Diagnostic Tests >> Test TC-23C - IAC Driver #2 Control Circuit

Test TC-23C - IAC Driver #2 Control Circuit

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.
NOTE: For circuit and connector terminal identification, see CONNECTOR IDENTIFICATION  . For wiring diagram, 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. If connector is okay, go to next step.
  2. Using an external ohmmeter, check resistance of Idle Air Control (IAC) motor driver No. 2 circuit (Yellow/Black wire) between IAC motor connector and PCM terminal No. 60. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2. If resistance is more than 5 ohms, repair open Yellow/Black wire or Violet/Black wire. Perform TEST VER-2.
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