Already tried disconnecting 12v battery, any ideas?

[ChrisMac]

My 2022 MGZSEV is coming up with several error warnings.

1. Forward Collision assistance unavailable
2. Auto Emergency Braking System unavailable
3. Pedestrian Auto Emergency Braking System unavailable
4. Stability Control Fault consult handbook
5. Traction Control Fault consult handbook
6. Auto Hold Fault consult handbook
7. Hill descent control fault consult handbook
8. Hill hold unavailable

Already tried disconnecting the 12v battery, any ideas?

 

[N2STY]

My 2022 MGZSEV is coming up with several error warnings.

1. Forward Collision assistance unavailable
2. Auto Emergency Braking System unavailable
3. Pedestrian Auto Emergency Braking System unavailable
4. Stability Control Fault consult handbook
5. Traction Control Fault consult handbook
6. Auto Hold Fault consult handbook
7. Hill descent control fault consult handbook
8. Hill hold unavailable

Already tried disconnecting the 12v battery, any ideas?

Have you tried a factory reset in the entertainment screen it's under settings?

 

[ChrisMac]

Have you tried a factory reset in the entertainment screen it's under settings?

Thanks, just tried that, still coming up with all error mesages

 

[N2STY]

Thanks, just tried that, still coming up with all error mesages

What is your 12v battery reading in ready mode?
I take it the top of Windows screen is clean?

 

[ChrisMac]

What is your 12v battery reading in ready mode?
I take it the top of Windows screen is clean?

14.1v

 

[N2STY]

14.1v

Sounds like you have tried all the normal stuff properly a trip to the dealer next

 

[ChrisMac]

Sounds like you have tried all the normal stuff properly a trip to the dealer next

Yes, think you're right. Thanks for your help

 

[Kithmo]

Try removing both battery terminals and touching them together.

 

[Robf]

Have you cleaned the around the sensor areas? front radar etc. It also sometimes takes a little while for the error messages to go away once the source is corrected (my last one was caused by low sunlight)

 

[ChrisMac]

Try removing both battery terminals and touching them together.

Not sure that's the best advice I've ever had on this forum

 

[Jomarkh]

Not sure that's the best advice I've ever had on this forum

Once the terminals have been removed from the 12v battery there is no power on them but if there are any capacitors between the + and - then this will discharge them or leave them off longer.

 

[ChrisMac]

Update - warning messages where still coming up this morning. Then just got in car and they've all cleared - random!

 

[Kithmo]

Not sure that's the best advice I've ever had on this forum

It was something a dealer advised IIRC.
Not a problem when there's no power attached.

 

[Rayz]

14.1v

Did you get this problem resolved. All it is I'm afraid is the 12v battery has dropped low.The 14.1 v reading you gave was it a blue reading cos that's the rectifier reading to the battery from the 400v volt battery .To get a true reading press start button twice to go to green without pressing Brake. That is the true reading of your battery . All those faults develope on a low battery. The AA came out to me recharged battery and drove it 15 miles to clear the faults . Only just read this. Rayz

 

[Rayz]

My 2022 MGZSEV is coming up with several error warnings.

1. Forward Collision assistance unavailable
2. Auto Emergency Braking System unavailable
3. Pedestrian Auto Emergency Braking System unavailable
4. Stability Control Fault consult handbook
5. Traction Control Fault consult handbook
6. Auto Hold Fault consult handbook
7. Hill descent control fault consult handbook
8. Hill hold unavailable

Already tried disconnecting the 12v battery, any ideas?

I had the same problem it was a low 12v battery. The AA got voltage up from a charger and drove 15 miles to clear the faults. Sorry late on replying and you probably know this . But the blue reading on the display is the rectifier reading not the true battery reading . Hope this part is useful.Rayz