Apr 13, 2009 · TEST 1: Power (12 Volts) Circuit Test. TEST 2: Testing The Ground Circuit. TEST 3: Testing For The Ignition Coil Switching Signal. TEST 4: Testing For The ICM Trigger Signal From The PCM. Related Articles/Tutorials.

Oct 21, 2009 · This article will walk you step by step thru' the testing and diagnostic of a MISFIRE or NO-START condition. You'll test the following components: ignition control module, spark plug wires, distributor cap and rotor and ignition coil and pick up coil of the GM 4.3L, 5.0L, 5.7L and 7.4L distributor type ignition system.

Feb 5, 2023 · This digital download covers everything from an engine no-start problem caused by the ignition module, ignition coil or distributor pick-up coil, to misfire problems caused by the distributor cap or spark plug wires. Start diagnosing your 1993 4.3L V6 Chevy S10 Pickup/GMC Sonoma troubles with confidence today!

Feb 27, 2014 · Disconnecting the wire disconnects the ESC (Engine Spark Contol) module from the ECM (Engine Computer Module). The ESC is mounted under the hood, usually on the firewall. It has a four wire conmnector which must be left in place.

There are multiple ways to do this. I show two methods in this video. One is using a basic test light and two is using a scope and low amp probe. Finally, I show how to perform a resistance test on...

Jan 29, 2017 · Check both connections at the coil. Does the ICM furnish both positive and ground to the coil? It could be a resistive connection to the coil. Thinking about it the ICM probably only controls the ground. I don't know whether there's a fusible link to your coil, but I would meter the positive side of the coil.

Apr 13, 2009 · Recheck all of your connections and retest. If you still do not get the appropriate voltage, then the fuse or relay that feeds this circuit is bad. With this result you have eliminated the ignition control module (ICM) and ignition coil as the source of …

Check for an open or shorted to ground ignition positive voltage circuit at terminal A of the ignition control module. Repair as necessary. Refer to Wiring Repairs in Wiring Systems.

But to figure out if the ICM is the root cause, diagnose the vehicle and pull out all the stored error codes. If you see P1351 or P06D1, you have a lousy ignition control module. As explained earlier, the ignition control module is a critical ignition system component that sends electrical flow to the ignition coils and plugs.

May 27, 2010 · To locate the ignition module, refer to a wiring diagram for your vehicle’s particular make and model. As you might guess, the placement can change based on the type of vehicle, so it is important to have the correct diagram or you will be practically going in blind.