tesla error code bms_w035
Ive had this code pop up a few times and then the vehicle may not restart, the first time this happened the vehicle did indeed not restart and they replaced the rear drive unit because they said coolant leaked through the motor some how, this was replaced under warranty, this same warning has now happened again along with reduced power, so i had it towed in there again and now this is what they are saying , there quote is $1470 for a guess, this dosnt sound fair.any ideas?
answer list:
My advice; keep checking the app for sooner appointments. I had this fixed today in my 16 X, was shocked that my original appointment was over two weeks out, kept looking for reschedules and found one for today (9 days wait) and they replaced the HV cooling system in about 7 hours.
Good luck OP.
The PTC heater is also part of the battery and car's thermal management system. Just like when the chiller goes down for cooling, the PTC I assume could throw a critical error. I am still learning though.
Just to confirm. Currently contactors not closing and 12v battery go flat pretty quickly? If so, of course have to chase down which HV client is causing the fault.
HV diagnostic process is a pain, any break in HVIL serial loop or HV client problems can disable HV battery output. And if errors+alerts don't point the way, then its all tools like dummy HV client plugs, megohmmeter, Tesla diag tools that can bypass/snoop/isolate subsystems to divide and conquer to find the fault. Since DIYers don't have these, turns into a time consuming guessing game.
I recently encountered a contactor not closing problem without useful errors. Randomly unplugged and replugged the coolant heater (I'm on gen1 DCDC) and all faults went way. My theory is just scrapped for fresh contact surfaces after some corrosion (2 days after a car wash) Proceeded to spray clean all front HV connectors with contact cleaner as a preventive. You might give that a try. Also you can hear what my failing contactors sounded like. It wasn't no contactor clicking but rather sounded a lot fainter than the usual. Made some analysis on why I heard what I heard in relation to the 3 contactors in the HV pack. Might be useful to you
13 MS 85 can't go into drive, recent LDU rebuild, some clues from clicking sounds | Tesla Motors Club
Your 2015 is gen2 DCDC FJB. But I wouldn't say water ingress issue has been solved compared to gen1 DCDC. Recently studied MS windshield runoff pathway, quite intrusive towards the front bulkhead/firewall area. I'd guess gen2 DCDC/FJB see some moisture as well.