Test NTC-12A - Checking Pcm Grounds & Power Circuits
WARNING: This page is about a different car, the 1995 Jeep Grand Cherokee. 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
in this article. For wiring diagram, see WIRING DIAGRAMS
section at the end of this article.
- Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Using scan tool in ohmmeter mode, check resistance of PCM connector terminal No. 11, ground circuit (Black/Tan wire). If resistance is more than 5 ohms, repair open Black/Tan wire. Perform TEST VER-2 . If resistance is less than 5 ohms, go to next step.
- Using scan tool, check resistance of PCM connector terminal No. 12, ground circuit (Black/Tan wire). If resistance is more than 5 ohms, repair open Black/Tan wire. Perform TEST VER-2 . If resistance is less than 5 ohms, go to next step.
- Turn ignition on. Using scan tool in voltmeter mode, check voltage on PCM connector terminal No. 9, fused ignition switch output circuit (Light Blue). If voltage is less than 10 volts, repair open Dark Blue wire, Light Green/Black wire or Light Blue wire. Perform TEST VER-2 . If voltage is more than 10 volts, turn ignition off. Reconnect PCM connector. PCM grounds and power circuits are okay. Test is complete.