This looks like a while ago but if still not solved try/look for a couple of different things. The brake system, believe it or not is pretty susceptible to noise and will cause a 1508 fault. A lot of times, because of the voltage required for the coils most folks don't run them separate from all the other runs to the machine. A comm loss on the drive is pretty common depending on if you have a 10K drive, DSD, or an Accord.

I would start with 2407MC for sure, but you may check the jumper config on the CPUA as well. If you have 60 ohms on the CPUA comm channel (local channel) then they are probably in the wrong config.

Also car will run for 10 - 20 minutes before faulting out with CAN CH 1 faults. Faults are 701, 1507, 1508 & 1515.

Appreciate any insight on this. Customer is getting upset.

Any other suggestions or ideas? I have never run into a Local CAN fault this difficult.

Just to clarify the coil suppressors that TKE uses has a resistor in series with heat shrink tubing around it. The purpose being, if the suppressor (capacitor) shorts then no other associated circuitry/ boards are damaged. If the suppressor failed then the voltage drop across the resistor creates enough heat that the soldered joint connecting it melts, which you would not be able to see since it is inside heat shrink tube. Checking suppressors, for me, means pulling on them to see if they separate inside heat shrink tube.

Also its worth noting that another source of noise, is a bad incoming voltage suppressor assembly. This is the black box attached to the incoming 3 phase. There are some of these early on that internal components would break loose from controller contactor vibrations. You check them by unattaching the black box and shaking it. If it rattles, replace it.

Also if this is Synergy Product, I think the UCA board is on CAN channel 1