Quick Answer: What Is A Ignition Control Module?

Does ignition module control fuel injectors?

The ICM doesn’t control the injectors, but the ECM will not pulse them without a signal from the ICM.

The ICM monitors the reluctor wheel on the distributor shaft and triggers the ignition coil at the proper moment to send spark out from the coil to the correct cylinder..

How does the ignition control module work?

The ignition control module switches transistors on and off based on input from the magnetic pulse generator in the distributor. The magnetic pulse generators transmits an AC voltage signal that corresponds with engine speed and the position of the crankshaft position.

How do you replace an ignition control module?

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.

How do you test an ignition module?

Connect the ground lead from the 12-volt test light to the negative terminal on the ignition coil. Have your partner crank the engine over several times. Your test light should flicker on and off. If so, your module is working properly and no further testing is necessary.

What happens when the ignition switch goes bad?

Car stalls while driving One of the first symptoms of an issue with the ignition switch is a vehicle that suddenly stalls while the engine is operating. If the ignition switch fails while the engine is operating it may cut off power to the ignition and fuel systems, which will cause the engine to stall.

Does ignition module need to be grounded?

Right back to the battery or main ground connection to the engine is best. The idea of ‘Grounding’ on the harness side is so the module is free to plug/unplug when you need to change it without stripping the ‘Black’ wire to the module.

How do I test my Duraspark ignition module?

Probe the red wire leading to the ignition module with the ignition switch in the “Run” position to ensure a proper voltage signal. Repair the circuit if readings are less than battery voltage. Test the resistance of the ground circuit by probing the black wire at the module and distributor.

What does a bad ignition control module do?

A faulty ignition module can affect ignition timing, resulting in an engine that misfires and runs rough. The engine may also run well at low speed, but won’t accelerate well. 3. Stalling: A failing ignition module can occasionally prevent the engine from getting spark, causing it to stall.

How do you test an ignition control module in GM?

If your GM vehicle has a slow or hard start, the ignition control module should be tested with an electrical test light.Open the hood of the GM vehicle. Locate the ignition module. … Connect the positive test light lead to the ignition module signal wire. … Ask a partner to crank the engine numerous times.

What are the symptoms of a bad ignition module?

Engine performance issues One of the first symptoms of a problem with the ignition module are engine performance issues. If the ignition module fails or has any problems it can lead to performance issues with the vehicle, such as misfires, hesitation, loss of power, and even reduced fuel economy.

Where is ignition control module located?

Where is the ignition module located? The location of the ignition module depends on where the vehicle was manufactured. In a domestic model, the module sits on, inside, or near the distributor housing. Foreign models will hide their ignitor within the vehicle’s firewall or wheel-well.

What would cause an ignition control module to fail?

The common cause of one driver/transistor failing is a shorted ignition coil primary winding. This is a winding of wire within the ignition coil where each loop is separated by a very thin plastic coating.

Can you test an ignition control module?

Yes, You can definitely test an ignition control module and using a multimeter is one of the fastest way to do so. What does the ignition control module do? The Ignition Control Module or ICM is nothing more than a switch per se that turns the ignition system “On” or “Off”.