2010 f250 5.4 no communication
All the codes show is they are not getting any power to those modules.
You might check under the power dist box in the engine compartment. Sometimes little guys with 4 legs get in there and start chewing on wires.
Also check the fuse panel under the left side of the dash.
You might check under the power dist box in the engine compartment. Sometimes little guys with 4 legs get in there and start chewing on wires.
Also check the fuse panel under the left side of the dash.
There are a few other considerations that I forgot to ask,
1. Does the vehicle have an add on remote starting device?
2. Performance Programmer?
3. Any add on's ?
They can and will present problems with communicating yielding a "No Communication" reply.
1. Does the vehicle have an add on remote starting device?
2. Performance Programmer?
3. Any add on's ?
They can and will present problems with communicating yielding a "No Communication" reply.
When we get a no communication reply, it could mean the network may have a shorted module, or no power supplied or an open..
There are a few tests you can do measuring resistances between certain designated pins on the diagnostic plug.
One procedure was to unplug component sensors like TPS, Pedal position sensors, Maf, IAT, for starters. Then check if you were able to establish communication.
With them unplugged, you would plug them in one at a time and when communication was lost, that component was with the problem. One other thing you might confirm, that is the 5 volt reference voltage that comes from the PCM and goes to the listed sensors. Pick the easiest one to check out. The MAF might be the easiest, if you have it there just keep plugging in the other sensors or check for the 5 volt reference voltage at each one.This is done with the key on engine off.
Were you able to use the scanner before you installed the plow?
Also, make sure you have good ground connections for pins 4 & 5.
To be clear, not meaning connections with the scan tool plug, but the chassis ground at pin 4 and the signal ground at pin 5. You probably already know this, but a reminder never hurts..
There are a few tests you can do measuring resistances between certain designated pins on the diagnostic plug.
One procedure was to unplug component sensors like TPS, Pedal position sensors, Maf, IAT, for starters. Then check if you were able to establish communication.
With them unplugged, you would plug them in one at a time and when communication was lost, that component was with the problem. One other thing you might confirm, that is the 5 volt reference voltage that comes from the PCM and goes to the listed sensors. Pick the easiest one to check out. The MAF might be the easiest, if you have it there just keep plugging in the other sensors or check for the 5 volt reference voltage at each one.This is done with the key on engine off.
Were you able to use the scanner before you installed the plow?
Also, make sure you have good ground connections for pins 4 & 5.
To be clear, not meaning connections with the scan tool plug, but the chassis ground at pin 4 and the signal ground at pin 5. You probably already know this, but a reminder never hurts..
Last edited by hanky; Mar 14, 2020 at 11:47 AM.
I have a 2010 F250 super duty with a 5.4 as well And has lost communications. The truck will not turn over and the shifter is locked in park. The battery works because power goes to the radio and all the other accessories. It just will not crank over and there is a red flash flashing lock on the dash. Did you ever figure out what caused your issue?
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