Injector Driver Module: Description and Operation

The Injector Driver Module (IDM) supplies 115V DC to all of the fuel injectors.

The IDM receives signals from the Powertrain Control Module (PCM) for Cylinder Identification (CID) and Fuel Delivery Command Signal (FDCS). The PCM controls when the timing of the injectors should start and how long the injector is open.

The IDM controls the injector firing sequence through output drivers. The IDM has an output driver for each injector: one low side driver for each injector and one high side driver for each bank of injectors. The injector is fired when the output driver closes the circuit to ground, completing the circuit ground path.