CAN bus no power suppl

[techworld2]

Dear Tesla User

I have recently purchased Model Y RWD in july 2023 Berlin made. I have purchased after market products Head up display 9inch Linux power source CAN bus vlue on the front passenger pillar . I have installed as per instructions it worked fine.

I have purchased rear screen from hanshow Andriod H7 model they suggested me to connect the cable only to CAN since i dont have OBD cable in the back side so i have tried connecting and i was able to connect and it worked fine for few days, all of a sudden my front display Linux 9inch and rear screen both stopped working i have removed the cables and reconnected restarted many times but no luck.

Any suggestions how to fix the issue ?

Note i have tested the rear screen in other tesla it was working fine but no idea what is going wrong ?

 

[Yeslak]

Try to replace it with another CAN bus connector to check out.

 

[techworld2]

Try to replace it with another CAN bus connector to check out.

Many thanks for your response. Is there a way to check whether the power supply is functioning or not from the CAN bus ? I mean like scan my tesla connecting OBD link will it show some malfunction ?

 

[techworld2]

Many thanks for your response. Is there a way to check whether the power supply is functioning or not from the CAN bus ? I mean like scan my tesla connecting OBD link will it show some malfunction ?

The seller advised me before installing to unplug 12 volt battery connection from the frunk + also unplug High Voltage battery to perform the installation , however i have not done that because previously i have done it worked fine , but is it a must and should step ?

 

[techworld2]

is it possible to test whether the power supply is coming from power cable front passenger pillar OBD , hi-lighted in the picture

 

[techworld2]

unfortunately i have tried all possible combinations
option 1) replugged only the display screen (9 inch) connected the CAN (blue) passenger pillar + power connection - no result

option 2) replugged extension CAN (blue) to passenger pillar + power connection ,also switched connecting to other while connectors - no result

option 3) i have tried this , do i have to unplug the 12 v battery from the front and try option 1 or option 2 will it works ?

i was wondering whether there is power supply coming or not any suggestions how can i test it safely

 

[pipesanchez21]

Did you figure out what the issue was and how to fix it? I’m having the same issue

 

[techworld2]

@pipesanchez21 , Hallo greetings

Yesni have fixed the issue i have unplugged and retarted the computer it worked fine