Initially this building took a power hit and we found issues with the CWIL. The P24A pico was blown and saw an obvious burn mark on the U13 chip. We replaced the CWIL.
Upon replacement, it was still showing offline with a DCN. We troubleshot the CAN back to the IOD and found only 15 ohms between CCL and CCH with con3 unplugged. I also had faults of 1920 and 1922. So both the IOD and CPUA were replaced.
With those replaced and software loaded on the CPUA, I now have 120 ohms on my CAN terminals. Unfortunately the problem remains. DCN shows maincop1 offline. On the CWIL, stat b is blinking erratically. On the IOD, both NPBAD and SPBAD LED’s are on. Tried an SPC and it says SP offline. Still have 1920 and 1922 faults.
Thanks in advance for any info!
BTW your goal for Can resistance is 60 ohms. That is set at factory by one 120 terminating resistor on CPUA, and parallel resistor on CWIL. Those resistors are part of the board and connected by board jumper. All other can resistors should be removed for car side(usually done in the field) most typically door board on hydro.
In my experience, the most common board to loose during power hit is CWIL. Sometimes IOD, and sometimes S24-3, but almost always CWIL.
With communication to the COP I was able to successfully configure the SP and NP, but the bad LED’s remain on for both. Should I be able to get the SP and NP LED’s to good with the selector unplugged? Would be nice to be able to move the car on inspect to access the car top.