Test TC-32B - Ignition Coil #1 Primary 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.
- Turn ignition off. Disconnect ignition coil connector. Check connector for damaged or pushed-out terminals. Repair as necessary. Perform TEST VER-2. If connector is okay, go to next step.
- Turn ignition on. Using scan tool, actuate ignition coil No. 1. Using scan tool in voltmeter mode, check voltage on ignition coil connector Auto Shutdown (ASD) output circuit (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, using an external ohmmeter, check resistance of ignition coil No. 1 primary circuit. Connect one ohmmeter lead to ignition coil connector cylinders No. 1 and 4 pin, and other ohmmeter lead to ignition coil connector battery positive pin. See Fig 1 . If resistance is more than 2 ohms, replace ignition coil. Perform TEST VER-2.
- If resistance is less than 2 ohms, turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Using scan tool in ohmmeter mode, check resistance of PCM connector terminal No. 19, ignition coil No. 1 driver circuit (Black/Gray wire). If resistance is less than 5 ohms, repair short to ground in Black/Gray wire. Perform TEST VER-2.
- If resistance is more than 5 ohms, check resistance of ignition coil driver circuit (Black/Gray wire) between ignition coil connector and PCM connector terminal No. 19 using an external ohmmeter. If resistance is more than 5 ohms, repair open Black/Gray wire. Perform TEST VER-2. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2.