Mitsubishi FBC20NAC:
FAULT CODE 41

I HAVE PROBLEMS WITH ERROR CODE 41 OF MITSUBISHI FBC20NAC.
THAT IS THIS CODE?
  • Posted 21 Apr 2012 05:05
  • Discussion started by Ropalman
  • Concepcion, Chile
"If it was not difficult, it would be fun"
Showing items 1 - 3 of 3 results.
Hi Ropalman,
yes according to serial number this is a FBC20N
The AC designates it is an AC control system. ie:FBC20N-AC
and yes according to the technical bulletin the information i posted below is what can set this code.

I also mentioned a drive inverter or faulty connections on the logic could cause this, after i thought of the job i had this issue with we also wound up replacing the drive motor due to faulty motor windings from a battery spill over. The acid ate through the insulation on the motor and allowed the fields to short out. Also had to rebuild the pump motor because the bearings siezed up from the acid.
All because the customer filled the battery BEFORE charging it which is a BIG no no :o) An expensive mistake on his part unfortunatly.

But all that aside i hope the information i gave you will be of some help.
  • Posted 25 Apr 2012 08:10
  • Reply by Jplayer
  • North Carolina, United States
John Player Jr
_________________
LiftOne, LLC
Charlotte, NC
Email: jplayer@liftone.net
JPlayer, Thanks for your reply.

This is the Serial Number: A4BC230216

Regards.
  • Posted 24 Apr 2012 22:07
  • Reply by Ropalman
  • Concepcion, Chile
"If it was not difficult, it would be fun"
give a serial number and i can help with more accurate information
i dont show a FBC20NAC on mitsu's database.
Based on the FBC20N a code 41 is steering contactor fault

manual states this code is triggerd if it sees any of the three things 1) faulty steer contactor , 2) Faulty main harness, 3) faulty logic unit.

There is an HPK service bulletin out on this code 41 error also.
Electric Static Discharge from truck going into steer motor circuit can cause this code 41. Static Discharge at a high level of more than 8000v can cause the FETS (Field Effect Transistors) not to open correctly.

They have a fix for this by installing an ESD filter across the power cables at the motor and also installing ferrite clamp around the orange and white leads going into the motor. They also recommend checking and installing a static strap on the truck if one is not present.

I have also seen this code triggered by a faulty drive inverter or faulty logic unit connection.


If you give me a serial number i can verify this information to be more accurate. ;o)
If this truck is still under warranty please check with your Mitsubitshi dealer in your area and have them repair this under warranty.
  • Posted 22 Apr 2012 00:23
  • Modified 22 Apr 2012 00:30 by poster
  • Reply by Jplayer
  • North Carolina, United States
John Player Jr
_________________
LiftOne, LLC
Charlotte, NC
Email: jplayer@liftone.net

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