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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-18B - Injector #2 Control Circuit

Test TC-18B - Injector #2 Control Circuit

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. It may be necessary to remove intake plenum to access injector connectors. Reconnect 10-pin injector connector. Disconnect injector No. 2 connector. Turn ignition on. Using scan tool, actuate Auto Shutdown (ASD) relay. Put scan tool in voltmeter mode.
  2. Using scan tool, check voltage on injector No. 2 connector Dark Green/Orange wire. If voltage is less than 10 volts, repair open Dark Green/Orange wire. If voltage is more than 10 volts, turn ignition off. Disconnect 10-pin injector connector. Using an external ohmmeter, check resistance of injector driver circuit (Tan wire) between injector No. 2 connector and 10-pin injector connector (injector side).
  3. If resistance is more than 5 ohms, repair open Tan wire. Perform TEST VER-2. If resistance is less than 5 ohms, replace injector. Perform TEST VER-2.
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