Disconnecting communications link with external computers

[Electric V]

is it possible to disconnect external communications links between the car and external computers and still drive/charge the car?

 

[Jomarkh]

Do you mean the ismart app?

 

[haloweenhamster]

Deactivate TBox through engineering mode
Failing that unplug TBox

 

[leonkernan]

Deactivate TBox through engineering mode
Failing that unplug TBox

I think i'd try disconnecting the antenna from the TBox before going that deep into it.

 

[Coulomb]

I think i'd try disconnecting the antenna from the TBox...

I think I'd be nervous about removing the load (antenna) from a radio transmitter.

 

[fnegroni]

is it possible to disconnect external communications links between the car and external computers and still drive/charge the car?

You mean after it has been stolen so it can’t be found?

 

[Brian 25]

You mean after it has been stolen so it can’t be found?

I'd be surprised if they could find it if it was stolen. If my car isn't on my drive the iSmart app can't find it so it still shows up on my drive ?

 

[Electric V]

Do you mean the ismart app?

I don’t think disabling the iSMART app would necessarily prevent communications with the MG4

I think I'd be nervous about removing the load (antenna) from a radio transmitter.

Why would you be nervous?

Deactivate TBox through engineering mode
Failing that unplug TBox

This sounds like the best solution. Do you have instructions for both deactivation and unplugging the TBox, please?

Looks like related discussion going on in this Thread. The TBox fuse box is mentioned: Location of the "T-Box" telematics ECU

 

[Electric V]

On another thread, the possibility of removing the associated communications module fuse was discussed. So is this fuse F52 on the MG4? See Fuse Box Diagram MG MG4 EV (2022-2024)

 

[Electric V]

On another thread, the possibility of removing the associated communications module fuse was discussed. So is this fuse F52 on the MG4? See Fuse Box Diagram MG MG4 EV (2022-2024)

F52 removal does not inactivate iSMART. I can't find TBox fuse on MG4 .... not on diagram, unlike MG5. Fuse Box Diagram MG MG4 EV (2022-2024). Fuse Box Diagram MG MG5 EV (2020-2024)

 

[Electric V]

I think i'd try disconnecting the antenna from the TBox before going that deep into it.
View attachment 31042

Does antenna removal prevent communication - have you tried it? Where it the TBox/Communication module located in a MG4? Is there an associated fuse that can be removed instead?

 

[haloweenhamster]

As people are determined here's some info
F6 is the fuse but it also stops another system
If you want to unplug it it's behind the glovebox
Personally wouldn't unplug the antenna with module still powered, in high signal areas it'll still partially work & likely burn out the RF circuit over time

 

[leonkernan]

Personally I wouldn't go screwing with the TBox (and I was prepared to flash a different Infotainment version!).
It's tied to too much and physically disabling it will cause issues.
If you look at the fault finding document, it's tied to the immobiliser and key detection.

 

[Electric V]

Personally I wouldn't go screwing with the TBox (and I was prepared to flash a different Infotainment version!).
It's tied to too much and physically disabling it will cause issues.
If you look at the fault finding document, it's tied to the immobiliser and key detection.

So you're recommending antenna removal?

 

[kiwi]

Is disabling via the normal user-accessible infotainment settings not good enough?

 

[haloweenhamster]

Although it's linked to immobilizer, lock, unlock etc that's for app unlock & start
TBOX is optional, not all international models have it so shouldn't effect the cars normal operation

Whereas unplugging the antenna but keeping the TBOX powered will likely break it BER, it'll make it so you won't be able to undo it if you want to sell the car

To disable it I'm not sure if clearing data in the engineering mode will be enough, it stops data from working but not the ecall

 

[Electric V]

Is disabling via the normal user-accessible infotainment settings not good enough?

Can you expand on this please? Software changes don't prevent communication with the car.

 

[leonkernan]

So you're recommending antenna removal?

No, I’m recommending you don’t mess with it. Full stop.

 

[Electric V]

I think the removal of Fuse#6 sounds like the best option.

 

[haloweenhamster]

You'll also lose the pedestrian alert