Importance of Injector Control Module in Powerstroke Engines

Jeep 2.5 Liter, four-cylinder engine, chromed....

Jeep 2.5 Liter, four-cylinder engine, chromed. This picture of the display engine shows part of the fuel injection system (with MPFI). The fuel rail is connected to the injectors that are mounted just above the intake manifold. This engine was developed by American Motors Corporation (AMC) and continued to be manufactured by Chrysler. All were built in Kenosha, Wisconsin. (Photo credit: Wikipedia)

The unique injection system of a powerstroke engine requires that the diesel fuel injectors obtain the proper voltage supply from a driver. This is where the injector control moduleor injector driver module comes into play.

The IDM or ICM is responsible for sending the electrical current to the solenoids, which means that its basic purpose is to simply convert voltage. Together with the powertrain control module, the two components operate the fuel injection system by managing how much fuel is sent to the engine and letting the fuel injectors know when to fire.
It is of vital importance that the voltage sent to the solenoids from the ICM or IDM is correct or drivability problems ensue. A variety of things, such as corrosion, can cause problems with the driver and even result in costly repairs that are not necessary. However, a ICM or IDM that has failed or is faulty can cause the vehicle to not start at all or just stall.
Checking the voltage output lets a mechanic easily know if there is a problem with the driver.
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