How do you test the ignition control module?
This is the wire that feeds power to the ignition control module. Both ignition coil connectors (black and gray) must remain connected to the ignition coil. The best way to test for the voltage inside the bank wire is using a back probe or a wire piercing probe.
What are the wires in the ignition module?
The ignition control module (ICM) has 4 wires coming out of it. Below are the descriptions of what each circuit does. Each circuit is identified by a letter, and this is the same letter that you will find on the ignition module’s connector. Power (12 V) Circuit. Ignition Control (IC) Signal. Engine Ground Circuit. Switching Signal Circuit.
How does the crank sensor work on the ignition module?
When the engine starts to crank, the crankshaft position sensor starts to produce and send its signal to the ignition control module (ICM). The ignition control module upon receiving this AC Volts crank signal, converts it into a DC digital signal and sends it to the ECM.
How does the ignition control module ( PCM ) work?
Now, the important thing to know is that the PCM controls the creation of spark from the get-go (crank up) and at all engine speeds thru’ the ignition control module (ICM). The really cool thing about this type of ignition system is that all of these signals ( IC Signal and the Switching Signal) can be tested easily with some very simple tools.
Which is the easiest GM ignition control module to test?
This is one of the easiest GM ignition control modules to test. This article will take you step by step through the whole process of diagnosing and troubleshooting a bad ignition control module and ignition coil.
The ignition control module (ICM) has 4 wires coming out of it. Below are the descriptions of what each circuit does. Each circuit is identified by a letter, and this is the same letter that you will find on the ignition module’s connector. Power (12 V) Circuit. Ignition Control (IC) Signal. Engine Ground Circuit. Switching Signal Circuit.
How to test the ignition module and crank sensor?
We’ll first check for the basics like battery voltage and engine Ground to the ignition control module (ICM).
Now, the important thing to know is that the PCM controls the creation of spark from the get-go (crank up) and at all engine speeds thru’ the ignition control module (ICM). The really cool thing about this type of ignition system is that all of these signals ( IC Signal and the Switching Signal) can be tested easily with some very simple tools.