JB4 & OBD Splitter

[Matthewstorm]

Does anyone use JB4 with an OBD splitter?

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[zrk]

No. There's not enough bandwidth to handle JB4 + whatever. If you use a JB4, you need to reserve it for the JB4.

 

[B58_ hwAyaq]

FWIW, you can unplug the JB4 to do Bimmercode coding or whatever, if that’s your concern.

 

[Rocksandblues]

What they said. you def don't want multiple outside devices crosstalking on the OBD

 

[Matthewstorm]

FWIW, you can unplug the JB4 to do Bimmercode coding or whatever, if that’s your concern.

I needed the OBD port for an LED wheel.

 

[Rocksandblues]

https://www.google.com/search?q=can...rome..69i57.6916j0j1&sourceid=chrome&ie=UTF-8

they make splitters. Go for it and let us know cheap enough and I am sure it won't blow up the car

 

[Matthewstorm]

https://www.google.com/search?q=can...rome..69i57.6916j0j1&sourceid=chrome&ie=UTF-8

they make splitters. Go for it and let us know cheap enough and I am sure it won't blow up the car

Yeah, not gonna try it. Deleted the LED on the wheel. Don't want to mess with it. Installing JB4 is more important than some flashing lights on the wheel. I looked at a lot of those videos. Seems some work others don't.

 

[Rocksandblues]

Yeah, blinky lights are cool and all... I am looking down track or through the next turn, not sure i would see even see the cute little lights that are popular these days

 

[Kmj442]

FWIW, you can unplug the JB4 to do Bimmercode coding or whatever, if that’s your concern.

By this do you mean I can just unplug the JB4 OB2 port and plug the CX (or whatever It is) and do the editing and then plug the JB4 back in?

I didn't want to have to get back under to unplug/plug back in the turbo connection since thats the hardest to get to.

 

[zrk]

By this do you mean I can just unplug the JB4 OB2 port and plug the CX (or whatever It is) and do the editing and then plug the JB4 back in?

I didn't want to have to get back under to unplug/plug back in the turbo connection since thats the hardest to get to.

Yes. Just the OBD port.

 

[Kmj442]

Yes. Just the OBD port.

Sweet, thanks for the quick answer! didn't want the ECU to get into some funky state but I guess the JB4 defaults to pass through with no modification if there's no power.

 

[B58_ hwAyaq]

By this do you mean I can just unplug the JB4 OB2 port and plug the CX (or whatever It is) and do the editing and then plug the JB4 back in?

I didn't want to have to get back under to unplug/plug back in the turbo connection since thats the hardest to get to.

Yes - I would suggest the following steps (maybe with too many steps, but I like to be extra safe):

- With car on, set the JB4 to the stock/bypass map (whichever map is as if it’s not plugged in)
- Then turn car off
- Unplug JB4 OBD plug
- Plug in adapter for Bimmercode
- Do all the coding steps as if the JB4 wasn’t even installed
- Power on car and confirm that your coding is good to go.
- Turn off car
- Remove Bimmercode adapter and plug JB4 OBD back in
- power on car and go back to the map you want

 

[zrk]

Yes - I would suggest the following steps (maybe with too many steps, but I like to be extra safe):

- With car on, set the JB4 to the stock/bypass map (whichever map is as if it’s not plugged in)
- Then turn car off
- Unplug JB4 OBD plug
- Plug in adapter for Bimmercode
- Do all the coding steps as if the JB4 wasn’t even installed
- Power on car and confirm that your coding is good to go.
- Turn off car
- Remove Bimmercode adapter and plug JB4 OBD back in
- power on car and go back to the map you want

Definitely no need to change the JB4 map before you do this.

 

[B58_ hwAyaq]

Definitely no need to change the JB4 map before you do this.

Appreciate the clarity. Admittedly, whenever I was unplugging the OBD on my JB4 (not on the Supra - different platform), it was because I was trying to dodge my dealer seeing anything out of the ordinary, so I took extra (maybe pointless) steps.

 

[GoldenEye]

LED lights on your wheels? Why am I so confused?

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