Pinpoint Test AT: FICM Circuit Fuel Delivery Error: Introduction: Detection/Management
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2004 Ford RV Cutaway, 2004 Ford Pickup, 2004 Ford F550 Super Duty, 2004 Ford F450 Super Duty, and 2004 Ford Excursion. However, it is still accessible from the selected car via links, so may be relevant.
The fuel injection control module monitor (FICMM) input line informs the diesel engine power monitor (DEPM) when the injectors are turned on and when the injectors are turned off. When the FICMM line is either shorted or open, the monitor strategy assumes that the fuel injectors are always turned on and sets DTC P2552. When DTC P2552 is set, the DEPM may, in some instances, set DTC P0148. When DTC P0148 is set, DTCs P2614 (CMPO failure) and P2617 (CKPO failure) may also set. If DTCs P2614 or P2617 are set with P0148, do not attempt to diagnose the CMPO or CKPO circuits. DTCs P1378 or P1379 (FICM voltage) may also cause DTCs P2552, P0148, P2614 and/or P2617 to set.
CAUTION:
The PCM harness connectors must be properly seated and the connector latch properly attached to eliminate possible driveability concerns or a no start condition. Installing the PCM connectors on an angle may cause an improper connection, misdiagnosis and damaged components. Install the connector until the lever pivots and seats itself. Apply light pressure to get the connector into position on the PCM and then fully seat the connector.
NOTE:
Visually inspect the harness connectors for corrosion, damage, proper mating and correct pin tension.
NOTE:
When the PCM is disconnected additional DTCs will be set. Clear all DTCs after restoring the vehicle.