Dear all, I just bought a 2014 Tesla Model S P85 with dual onboard chargers, that the previous owner did not want to fix anymore. It has 270'000 km, the rear motor was changed at Tesla in August 2022, the battery was tested good a few weeks ago, but currently the SoC is at 0%, since a few days, due to charging not being possible.
Once I got the car home, on my car trailer, I started investigating it a bit further. I am located just outside Geneva, Switzerland, so the charge port is a 3-phase model, non-motorized (gen1).
The problem is, the charge port will not open, and the main battery is currently a 0% so I would (of course) like to charge it as soon as possible. The 12V battery was also empty, after the HV battery dropped too low.
I currently have a classic lead-acid battery connected to the terminals behind the nosecone, and a battery charger connected, so the 12V is up and running again.
When I push the "unlock charge port" on the screen, I can hear the HV relays clicking inside the car, but the port just does not open. If I (gently) pry the charge door open and use the manual release of the locking tab from inside the trunk, I can insert the charge cable, but the car refuses to start charging, since I can't use the "manual opening" to start charging.
The fault codes, first readout, after connecting the external 12V battery in parallel are these:
BMS_u008_limpMode
BMS_w172_SW_Drive_Iso_Warning
I had a look inside the HV Junction Box, all fuses are intact and all looks visually ok.
To go a bit further, I found a diagnostics cable, bought toolbox3 access for an hour, installed the proxy, allowed insecure access in Chrome for toolbox and by entering "Service Mode Plus", I could read the following, adding some info;
BMS_w172_SW_Drive_Iso_Warning = The BMS has detected isolation failure conditions in multiple drive cycles.
BMS_w137_SW_Brick_UV_Warning = Brick voltage under warning threshold
BMS_w069_SW_Low_Power = Description is the same as the fault code
CHGS_d001_replace_Charger = Description is the same as the fault code
Ok... So could it be that I have a fault in one of my onboard chargers?
Any and all help greatly appreciated... I am a computer engineer and I have worked on cars as a hobby for over 30 years, and I would like to get a much deeper understanding on the Teslas, in particular the Model S. Except the TMS P85, I also have a TMS P100D(L), and my wife a TMS 90D.
Thanks again.
Cheers,
Magnus
Once I got the car home, on my car trailer, I started investigating it a bit further. I am located just outside Geneva, Switzerland, so the charge port is a 3-phase model, non-motorized (gen1).
The problem is, the charge port will not open, and the main battery is currently a 0% so I would (of course) like to charge it as soon as possible. The 12V battery was also empty, after the HV battery dropped too low.
I currently have a classic lead-acid battery connected to the terminals behind the nosecone, and a battery charger connected, so the 12V is up and running again.
When I push the "unlock charge port" on the screen, I can hear the HV relays clicking inside the car, but the port just does not open. If I (gently) pry the charge door open and use the manual release of the locking tab from inside the trunk, I can insert the charge cable, but the car refuses to start charging, since I can't use the "manual opening" to start charging.
The fault codes, first readout, after connecting the external 12V battery in parallel are these:
BMS_u008_limpMode
BMS_w172_SW_Drive_Iso_Warning
I had a look inside the HV Junction Box, all fuses are intact and all looks visually ok.
To go a bit further, I found a diagnostics cable, bought toolbox3 access for an hour, installed the proxy, allowed insecure access in Chrome for toolbox and by entering "Service Mode Plus", I could read the following, adding some info;
BMS_w172_SW_Drive_Iso_Warning = The BMS has detected isolation failure conditions in multiple drive cycles.
BMS_w137_SW_Brick_UV_Warning = Brick voltage under warning threshold
BMS_w069_SW_Low_Power = Description is the same as the fault code
CHGS_d001_replace_Charger = Description is the same as the fault code
Ok... So could it be that I have a fault in one of my onboard chargers?
Any and all help greatly appreciated... I am a computer engineer and I have worked on cars as a hobby for over 30 years, and I would like to get a much deeper understanding on the Teslas, in particular the Model S. Except the TMS P85, I also have a TMS P100D(L), and my wife a TMS 90D.
Thanks again.
Cheers,
Magnus