Test TC-20A - Injector #4 Control Circuit (DTC 27)
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.
- Turn ignition off. Disconnect 10-pin injector connector. Using an external ohmmeter, check resistance of injector driver circuit between injector connector (injector side) Light Blue/Brown wire and Dark Green/Orange wire. If resistance is not 10-15 ohms, go to TEST TC-20B.
- If resistance is 10-15 ohms, move ohmmeter lead from injector connector Dark Green/Orange wire to ground. If resistance is less than 5 ohms, repair short to ground in Light Blue/Brown wire. Perform TEST VER-2.
- If resistance is more than 5 ohms, turn ignition on. Using scan tool, actuate Auto Shutdown (ASD) relay. Using scan tool in voltmeter mode, check voltage on injector connector (harness side) Dark Green/Orange wire. If voltage is less than 10 volts, repair open Dark Green/Orange wire. Perform TEST VER-2.
- If voltage is more than 10 volts, turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Using scan tool in ohmmeter mode, check resistance of PCM connector terminal No. 13, injector driver circuit (Light Blue/Brown wire). If resistance is less than 5 ohms, repair short to ground in Light Blue/Brown wire. Perform TEST VER-2.
- If resistance is more than 5 ohms, use an external ohmmeter to check resistance of injector driver circuit (Light Blue/Brown wire) between injector connector (harness side) and PCM connector terminal No. 13.
- If resistance is more than 5 ohms, repair open Light Blue/Brown wire. Perform TEST VER-2. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2.