Recent content by odonnse

I assume you aren't hearing the relay click when you insert the key, right?

Much appreciated for the kind words! I had to take a little breather after the wild ride this mower took me on — it was equal parts wrenching and therapy 😅 But I’m back, and wouldn’t you know it, the saga continues… This time it’s the infamous E325 error: the dreaded right motor hall fault...

Did you look at the wiring diagram I posted? That at least gives signal names for the battery pins. But if I was a betting man its either pin 12 tells the battery that the VCM key is installed or its a wake on CAN situation. I was told by someone very close to the development of these batteries...

E111 is a VCM internal fault. It means the VCM failed its internal test. Unfortunately that is all the data that the VCM code sheets says. Did you review the 56V Electric Zero Turn Troubleshooting guide? That walks you through some initial steps, all three versions of these mowers are very...

Wow, you have really dove in! I appreciate the initiative and good luck on your goal, let me know if I can help. Not sure about your system, but on the newer the motors themselves also communicate over CAN. Really the only thing that does not communicate over CAN is the PDM, brake switch, TPS...

The motors are most likely DC motors. The motor controllers will drive a square wave to alternate per phase of the motor based on the speed input provided. Obviously the blade motors will be driven at a constant speed and the drive motor will be variable. I guess your model version has some more...

I would be reluctant to do that, easy way to cause a catastrophic failure of your batteries and start a fire if you are not careful. Does your VCM turn on at all? It is odd that you are getting an error code on one thing but not the other.

I believe that is the PDM (Power Distribution Module). Your earlier system looks a bit different than mine, but I believe that is it. That is what houses the contactor that gives the "click" when the VCM (Vehicle Control Module) says everything is good. If you have error codes, most of the time...

The wiring diagram is just for the main harness. The motor controller power comes from the PDM. And the CAN bus connector you see in the drawing is what connects to the CAN bus harness for the motor controllers. But the main harness connects directly to your BMS with a deutsch style connector.

I've attached the wiring diagram I have for the two-connector VCM, which I believe matches what your mower is using. When it comes to CAN bus analysis (CAN sniffing), it’s much more effective if you have a baseline of what the expected messages should look like. That way, you can compare data...

Ah, yes. I think this is the first version of this system. Not sure if craftsman ever updated it like Cub Cadet did, I would assume so as MTD just made them all. Anyway, do you have the wiring diagram for this main harness? If not, I can dig it up.

Jwax, Appreciate the feedback, it was an adventure! The battery system is the one thing I have yet to dive face first into on this system. First thing, did you check the battery inline fuse? Second, what is the code on the VCM? Third and final, do you have a two connector VCM (smaller display...

100%, effective troubleshooting is an art form. Usually helps to have some technical documentation from the manufacturer. This was very much a reverse engineering exercise with a bit of repair sprinkled in for good measure.

Here is the scanned version of the wiring diagram. Should be more clear, it was a scan of a printed copy.

So… turns out the wiring diagram I mentioned? Yeah, it’s basically useless. Way too blurry to be helpful. My scanner decided to join the LT42e in rebellion and refused to cooperate. I’m working on getting a proper scan uploaded soon—one that doesn’t look like it was faxed from the moon. Sit...