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FICM Voltage Testing

(Perform this check when the engine is completely cold.)

1. Remove the two bolts that hold the coolant reservoir to the cowl and push the reservoir out of the way forward and to your right. You do not need to disconnect any of the hoses.

2. On top of the FICM is a small cover held on by two #20 Torx screws; remove these two screws and pry the cover off.

If your FICM Test Points looks like the photo below (4 Screw Model), start at step 3 otherwise, go to the second photo below then step 3 below that


3. Take a multi-meter set on DC volts and connect the ground lead to battery negative, and with the key ON measure the voltage at the screw on your right—closest to the driver’s side fender. Do not let the probe of the meter touch the FICM housing or permanent damage will occur! The voltage should be right at 48 volts. Anything between 47 and 49 is good.

4. Have an assistant cycle the key and measure the voltage during the initial key-on buzz test. Voltage should not drop below 46 volts.

5. Next measure the voltage while cranking the engine. If voltage stays at or above 45-46 volts, the FICM is fine. Abnormally low battery voltage can give a false low FICM voltage reading, so make sure your batteries are good.

If the voltage is above 46 volts in all the tests, your FICM is in working condition but the intermittent failure condition still could indicate a FICM failure.

If it is between 36 and 45 volts its OK, but not great. If it is between 25 and 35 volts, you have serious FICM problems.

(Perform this check when the engine is completely cold.)

1. Remove the two bolts that hold the coolant reservoir to the cowl and push the reservoir out of the way forward and to your right. You do not need to disconnect any of the hoses.

2. On top of the FICM is a small cover held on by two #20 Torx screws; remove these two screws and pry the cover off.

3. (7) Screw Model FICM's. Take a multi-meter set on DC volts and connect the ground lead to battery negative, and with the key ON measure the voltage at the screw on your left—closest to the passenger’s side fender. Do not let the probe of the meter touch the FICM housing or permanent damage will occur! The voltage should be right at 48 volts. Anything between 47 and 49 is good.

4. Have an assistant cycle the key and measure the voltage during the initial key-on buzz test. Voltage should not drop below 46 volts.

5. Next measure the voltage while cranking the engine. If voltage stays at or above 45-46 volts, the FICM is fine. Abnormally low battery voltage can give a false low FICM voltage reading, so make sure your batteries are good.

If the voltage is above 46 volts in all the tests, your FICM is in working condition but the intermittent failure condition still could indicate a FICM failure.

If it is between 36 and 45 volts its OK, but not great. If it is between 25 and 35 volts, you have serious FICM problems.

 

FICM Removal

Tools needed:

Small 1/4 or 3/8" drive socket wrench, 8mm socket, 10mm socket and a pair of pliers. The FICM is located beneath the coolant reservoir bottle in the photos.

1. Start with a cool engine and truck.

2. Remove and reposition the coolant reservoir. You can do this without draining the coolant as long as the reservoir is tilted to the right (driver's side). Remove these using the 8mm socket.

3. Slide the  tank forward slightly and Loosen and slide the (2) hose clamps down the hose. Remove the hoses and Tilt the tank to the right while sliding it forward and out of the way of the FICM. There will be some pressure in the system and some coolant can spill from the hoses. You can position the hoses upward or tie them up with zip ties to keep coolant loss to a minimum.

4. Remove the (4) bolts/nuts that secure the FICM to the truck. Some FICM's have (2) 8mm nuts in the back and (2) 10mm nuts in the front, some have all (4) that are 10mm.

5. There are (3) connectors that attach the FICM electronics to your vehicle. Lift the FICM slightly and squeeze each of the (3) tab connectors toward the inside of the FICM and pull down. Each are firmly attached to the Module. When the connections are removed, it is now ready to be removed from the engine compartment. When re-installing the connectors, push in until you hear an audible "snap" indicating it is connected.

Here are some additional photos from Ford's repair manual:

 

 

Feel free to contact us with any questions @ 214-616-7858 or via email at Shannon@ficmfixer.com

 

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