Auto Repairing 2003-2004 Ford Excursion Driveability—No Start Or Constant Engine Misfire—Fuel Injection Control Module (Ficm) Diagnosis—6.0L Diesel

Auto Repairing 2003-2004 Ford Excursion Driveability—No Start Or Constant Engine Misfire—Fuel Injection Control Module (Ficm) Diagnosis—6.0L Diesel

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Issue vehicles equipped with a 6.0l engine may exhibit a no start or a constant engine misfire. Multiple root causes can create these symptoms, including the fuel injection control module (ficm). Action if the ficm is suspected to be the root cause refer to the following procedure to verify the ficm is at fault before replacement. Service procedure note verify that the wds is at the latest release level and the vehicle is updated to the latest calibration. Calibration issues and related powertrain components can mimic a defective ficm. Note the most common symptoms of a failed ficm are a no start or a constant misfire at all engine temperatures. Diagnostic trouble codes (dtcs) u0105 or p0611 may also be present. Symptoms other than these are not likely to be caused by the ficm module. Note the replacement ficm does not contain software, it must be programmed prior to use. 1. Check for ficm wiring harness chafing and use a wiggle test to verify integrity of connections at the ficm and injectors. It is common to see dtc’s p2614 and p2617 as a result of wire chafing. It is often necessary to push on the engine/injectorharness to duplicate a ground out condition.

Ensure ficm connectors are fully seated. If any wire chafing is noted, repair as necessary and reevaluate vehicle, if the condition is corrected return vehicle to customer. If no wiring chafes are located proceed to step 2. Note some common chafing locations are: upper left valve cover, valve cover bolt, and intake bolts, under and near the ficm. 2. Set up wds to test ficm power and grounds by selecting: a. Tool box b. Datalogger c. Tick mark d. Powertrain e. Engine f. Tick mark g. Clear all pids h. Select: (1) (2) (3) (4) i. Koeo ficm_lpwr ficm_mpwr ficm_vpwr b+ j. Tick mark 3. Monitor datalogger pids for the following values: • ficm_vpwr: ficm vehicle power from ignition switch voltage = battery voltage • ficm_ lpwr: ficm logic power from fuse, ficm relay voltage = battery voltage • ficm_mpwr: internal ficm power voltage = 47-50 volts a. If all of the above readings are within range, proceed to step 4. B. If any of the above are out of range, disconnect the three (3) ficm connectors and inspect condition of connector, pins, and wiring at the connector, paying close attention for wiring chafes. Repair any issues and reevaluate vehicle, if the condition is corrected return vehicle to customer.

If the condition is still present continue to step c. C. With a voltmeter check the following: (1) (2) check for b+ voltage at pin 27 of connector 1388c with the koeo. If no, or low voltage is present, repair as necessary. If b+ is present, jumper pin 27 of connector 1388c to a good battery ground (see figure 2 at end of article). Check for b+ voltage at pins 4,7,8,23,24,25 (see figure 2 at end of article). If no or low voltage is found at any pin, repair as necessary. If b+ is present at all pins, replace the ficm and return vehicle to customer. Note the replacement ficm does not contain software, it must be programmed prior to use.