ECM troublecodes pcfred
Q:I know where my ECM is but what does it do? A:The ECM is the "brain" of the fuel injection system, it monitors the operation of the engine through the input of different data from sensors and controls the injection system, the transmission and the emissions systems with output to the different actuators solenoids in the system.
diagram wiring ecm 1225550 Gallery
peterbilt 378 wiring schematic