TB240 goes into limp mode

I have a TB240 2017 model year with a problem. It's throwing codes 612 and 8005. Code 612 is a CAN communication error (OX024) and 8005 is Pump PWM output voltage error (too low). The dealer has put in a new master module, a new sub module, and run an extra ground to the safety solenoid. I put a new key switch in it myself. The dealer claims there is nothing they can find wrong with the harness. Sometimes it'll start up and work fine. Other times every time you start it up, it's beeping and flashing. Has no throttle response so it's stuck at low idle. Anybody ever run into this? Any thoughts or ideas?

Im having the same problem with are tb240 I have install a new control box replaced the fuse box wire harnesses and key switch and I'm still getting the same codes and the machine still doesn't move I'm going to canned over this machine if I don't find out something quickly

John Griffin said: Has no throttle response so it's stuck at low idle. Click to expand... Check on the right operating lever if the Deceleration Button is depressed. Press again to release.

The throttle on are unit works as it should but still haven't got the machine to operated dose anyone have a idea on a fix or bypass or know where I can get the wiring schematic on the tb240

daytonadockshop1 said: The throttle on are unit works as it should but still haven't got the machine to operated dose anyone have a idea on a fix or bypass or know where I can get the wiring schematic on the tb240 Click to expand... What's you email? I have the TB240 wiring diagram

PeterG said: Check on the right operating lever if the Deceleration Button is depressed. Press again to release. Click to expand... I was unaware it had this feature. Either way, it's constantly beeping and flashing at you. I'm going to try to fix my harness I guess. It's got a bad Can wire.

daytonadockshop1 said: The throttle on are unit works as it should but still haven't got the machine to operated dose anyone have a idea on a fix or bypass or know where I can get the wiring schematic on the tb240 Click to expand... Sounds like you should check for power and ground to your safety solenoid.

That's what mine is doing as well I have a new fusebox with wire harnesses in and ecm and new power relay replaced all relays and I have a heavy equipment program computer that I guess won't work for this unit I have to call the manufacturer and find out why! The motor runs perfect the wiring harnesses are so expensive we have 1700 and they want another 800 for one and 1100 for the other one to make it all new wiring between the control boxes so expensive crazy but my email is [email protected] !! I will re wire the hole thing my self before I pay for another harness from them I'm very good at build full harness for show builds I just need some direction on the placement thank you very much for the time!

John Griffin said: What's you email? I have the TB240 wiring diagram Click to expand... [email protected]

daytonadockshop1 said: [email protected] Click to expand... I sent you an email

Hello, I'm new here and having this same exact issue. I've been through the fuse box, safety switch and several other connections trying to find something wrong but nothing. Have yall had any luck figuring it out?

Piddling said: Hello, I'm new here and having this same exact issue. I've been through the fuse box, safety switch and several other connections trying to find something wrong but nothing. Have yall had any luck figuring it out? Click to expand... It apparently ended up being the wiring harness. I'm going to dig into it and try to fix it since it was $11,000 for the dealer to put a new harness on it. The wiring harness itself is about $1200. According to them the machine has to basically be split in half to do it. I just went the end of last week to get it from the dealer as they repeatedly were supposed to give me a trade in value towards a TB260 but couldn't get their act together for months.

Have you called Takeuchi USA, and spoke to the guys in the service department? If so, what did they say? I have found them to be helpful at times.

John, thanks for your reply. I find it hard to believe the wiring harness is causing the issue, as I'm sure you agree. Peter, I haven't tried that, honestly hasn't even crossed my mind. Thank you for the advice.

Another option is contacting your local United Rental dealer for them to do the repair work. United Rental mechanics work on a lot of Takeuchi machines, and have been doing so for much longer than many of the Takeuchi Dealers. In our area, our Takeuchi Dealer changes every 4-5 years, and their mechanics are not Takeuchi experts.

Did anyone resolve this problem? Mine is doing it. I found this thread and checked the pin 1 and 2 and saw 12v and good ground. https://www.heavyequipmentforums.com/threads/tl12-error-code-612-1714.113922/

Mine ended up being a bad connection. I cleaned it and I haven't had any issues since. I think I've put 400ish hours on the machine.

Update: I replaced the sub module on mine per the link above (the OX024 module with gray and black plug). This enabled the hydraulics back on my machine. The 612 and 8005 codes and beeps persist however. I plugged my old module in and sure enough it seems dead, no controls...I will call another tech out to help me with these codes and check the other solenoids related to these codes.

I have a Tb240 as well that out of the blue gives a 612 1714 code... Any help? I tested wiring to controller near battery box and checked relays and fuses...

Safety arms are best tested with a 2 amp or 5amp bulb in a loop to verify if the wiring don't act up under load. I disconnect the battery at both posts and put an old glove on each cable end before preceeding. Check the schematic with arm up for which pins the power runs through, and with the harness disconnected run power through those wires. Do the same with arm down to see if the wires can handle load. Simple tests like this can rule out weakened harnesses. Simon C