Diagnostic Aids
WARNING: This page is about a different car, the 2003 Ford Pickup, 2003 Ford F550 Super Duty, 2003 Ford F450 Super Duty, 2003 Ford Excursion, and 2003 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
Perform this test when directed by QUICK TEST.
- High Side Drive Outputs (Right & Left Bank)
High side driver output function is to distribute energy to correct bank based on Cylinder Identification (CID) and provide regulated current to unit injectors, based on Fuel Delivery Command Signal (FDCS) from Fuel Injection Control Module (FICM) internal 48-volt supply. Injection timing and duration is commanded by PCM in FDCS. - Low Side Drive Outputs
Low side drive outputs control sequencing (firing order) of engine, based on CID and FDCS inputs. - Detection & Management
Turn ignition on. Record IDM DTCs stored in KOEO ON-DEMAND SELF-TEST and KOEO INJECTOR ELECTRICAL SELF-TEST. Using scan tool, access RETRIEVE/CLEAR CONTINUOUS DTCs from scan tool menu to clear codes from memory. Record any DTCs displayed. Press CLEAR ALL button on scan tool. DTCs are now cleared from memory. Repeat KOEO ON-DEMAND SELF-TEST and KOEO INJECTOR ELECTRICAL SELF-TEST. Any DTCs that reappear are hard faults. If no DTCs reappear, then fault is intermittent.The FICM is capable of detecting individual injector open and shorts to ground or voltage while the engine is running. The FICM is also capable of detecting right or left bank high side opens or shorts to ground. An on-demand injector self-test will allow the operator to verify operation of all injector solenoids with the engine off. FICM detected DTCs will not be transmitted if the intermodule (PCM to FICM) controller area network (CAN) is inoperative. If a low side short to ground condition is determined by the FICM, a fault condition will be transmitted to the PCM through CAN and the PCM will enable the MIL.