How do you replace ICM?
Reach under the engine and unplug the coil assembly electrical connectors. Remove the assembly mounting bolts using a ratchet and socket. Remove the assembly from the engine and remove the coils using a ratchet and socket. Remove the old ignition module from the base plate and install the new unit.
What happens when the ICM fails on a GM car?
Generally, when the ICM or the ignition coil fails, your GM car or truck will Crank but NOT START. Specifically, the ignition coil will not spark.
What was the ignition module for a 1996 GMC k1500?
1996 GMC K1500, K2500, K3500 Pick Up. All of the information you need to diagnose a misfire or a no-start problem (caused by the ignition coil, the ignition module, or the crankshaft position sensor). Wiring diagrams.
How to test the GM ignition control module?
You can find this tutorial in Spanish here: Cómo Probar El Módulo de Encendido GM 4.3L, 5.0L, 5.7L (1995-2005) (at: autotecnico-online.com ). Generally, when the ICM or the ignition coil fails, your GM car or truck will Crank but NOT START.
How does the crankshaft position sensor work on a GM car?
The crankshaft position (CKP) sensor starts to create its Crank Signal, which it sends to the PCM. The crankshaft position sensor is a Hall Effect type sensor and produces a digital (On/Off) signal that can be seen with an LED or an oscilloscope.
Generally, when the ICM or the ignition coil fails, your GM car or truck will Crank but NOT START. Specifically, the ignition coil will not spark.
1996 GMC K1500, K2500, K3500 Pick Up. All of the information you need to diagnose a misfire or a no-start problem (caused by the ignition coil, the ignition module, or the crankshaft position sensor). Wiring diagrams.
Can a GM ignition control module be used?
The ignition control module (ICM) and ignition coil tests in this article assume that your vehicle is Cranking but NOT STARTING due to a NO SPARK Condition. If you’re GM car or truck starts and runs, this article will not help you.
The crankshaft position (CKP) sensor starts to create its Crank Signal, which it sends to the PCM. The crankshaft position sensor is a Hall Effect type sensor and produces a digital (On/Off) signal that can be seen with an LED or an oscilloscope.