F 450 4WD Super Duty V8-6.0L DSL Turbo VIN P (2003)
The internal structure of the FICM is shown in Figure 2.The FICM internally generates 48V used to drive the injector solenoids
See Figure 3 for diagram of output configuration Each individual injector is controlled with four driver outputs from the FICM There are high and low
side drivers for the open and close coil of each injector
On 2004.25+ (1845117C2 FICMs) the low side driver is actually shared among 4 injectors This means an injector short to ground on the low side could
produce four different cylinder error codes On 2003.25 (1837127C4 FICMs) there are individual low side drivers for each injector. This means a low
side failure would result in a single injector error code. Note: International FICM part numbers are located on a label on the connector side of the
module.
