Errors after battery disconnect

[DusHunter]

Hi friends,

yesterday i disconnected the battery from the electrical system for a couple of seconds.
After reconnect the battery I received many erros in the front display (ESC+ABS Airbag, Diff locks).
Do you know how what to do?

 

[landmannnn]

Hi friends,

yesterday i disconnected the battery from the electrical system for a couple of seconds.
After reconnect the battery I received many erros in the front display (ESC+ABS Airbag, Diff locks).
Do you know how what to do?

Disconnect it again. Then discharge any capacitors in the electronics by switching on something that is always live (brake pedal, horn etc).
Then reconnect.
The airbag light might stay on, but it will go with a bit of driving.

 

[MattA]

to reset or do what is called a hard reset disconnect the battery terminals and leave them disconnected for at least 10 minutes
You can also touch the cable terminals together for a few minutes ( do not connect battery terminals together just the cables when disconnected from the battery)
This will drain all voltage from the electronics in the car.
This is a Discovery 3 and 4 method of doing a hard reset
I am not familiar with the duel battery system in the IG so it would be advisable to disconnect both batteries, main starter first then the secondary battery would be the logical choice but a check of the owners manual may help as well

 

[DusHunter]

Thanks for good ideas.
Unfortunately it doesn't work.
Now I have to go to the dealer to reset the electrical system.
I will ask them, how is the procedure to disconnect the battery system if necessary.

 

[USAFN1985]

Thanks for good ideas.
Unfortunately it doesn't work.
Now I have to go to the dealer to reset the electrical system.
I will ask them, how is the procedure to disconnect the battery system if necessary

Just buy a cheap OBD scanner and clear the code

 

[DoubleDoom]

Don't be too worried that when you reconnect the battery, things like the altimeter etc will not be working correctly. They take a while to calibrate.

 

[ECrider]

Thanks for good ideas.
Unfortunately it doesn't work.
Now I have to go to the dealer to reset the electrical system.
I will ask them, how is the procedure to disconnect the battery system if necessary.

Not done myself yet as had no need but others have said unlock car with fob, open door(s) then leave for 10-15mins until car goes to sleep (cabin lights off, main screen off) then disconnect battery.

 

[TheDocAUS]

Hi friends,

yesterday i disconnected the battery from the electrical system for a couple of seconds.
After reconnect the battery I received many erros in the front display (ESC+ABS Airbag, Diff locks).
Do you know how what to do?

Download and print out the Rok Dr Guide and use it next time, see Paragraph 13.2.

 

[nasmo]

Thanks for good ideas.
Unfortunately it doesn't work.
Now I have to go to the dealer to reset the electrical system.
I will ask them, how is the procedure to disconnect the battery system if necessary.

Welcome to the club. My car has been sitting at the dealership for two months even a reset won't return it to normal.

Warranty will replace my CAN gateway as an attempt to fix this

 

[nasmo]

Download and print out the Rok Dr Guide and use it next time, see Paragraph 13.2.

That won't work. He already triggered the errors. There is no way to reset it . The CAN gateway module fails and will require a complete replacement.

 

[Zimm]

That won't work. He already triggered the errors. There is no way to reset it . The CAN gateway module fails and will require a complete replacement.

how does this happen? is there a voltage spike? is there no protection?

 

[nasmo]

how does this happen? is there a voltage spike? is there no protection?

There is no fuse issue or spike at all. The Can Gw module will be bricked instantly and there is no way to fixing it.

 

[Zimm]

There is no fuse issue or spike at all. The Can Gw module will be bricked instantly and there is no way to fixing it.

it just seem like something besides a mere loss of power would do that. removing the terminals with a draw can cause voltage fluctuations.

 

[TheDocAUS]

That won't work. He already triggered the errors. There is no way to reset it . The CAN gateway module fails and will require a complete replacement.

That is why the post says use it next time, to avoid the errors and having to visit the dealer for a fix.

 

[DusHunter]

My dealer solved the problem by connecting his computer to reset the error lights.
It needs approx 10 minutes.
So I will be carefull, when I have to work with the battery system in the future.

 

[Tom D]

I’ve had this issue 3 times, first two had to be reset by the dealer. Than recently it happened again, (accidentally left the PWR switch on and battery went down to 50%. The car still started but the lights came on anyway). Well this time it fixed iteslf.
I was working up north for 5 days and left the car parked up for that time. When I got back to it the lights had gone!
I have no explanation for this, I had been told by the dealer that the only way to fix the issue was a laptop reset.

 

[Tenac]

I've had this on many more modern vehicles. So both BMW and Porsche recommend when disconnecting the batter follow these procedures. So far they have worked on other brands as well and this includes my Grenadier.

Before starting work:
Unlock vehicle, roll down windows and open access to battery trunk or frunk. Place towel over latch so it cannot accidently close. (in our case its rear passenger doors.)
Remove the key from the vehicle, keep unmoved for the entire time of work. ( I placed mine in a cabinet inside the home where it would not be disturbed).
Once the following two items are complete let vehicle sit till it goes to sleep. Indicators for this would be lights go off, dash goes dark, no indicator lights are on. ( This seems to be somewhere between 10-30 mins depending on which car I work on)

Remove the negative battery connection first or only. (depending on the work you might only have to remove the negative side)
Perform work, if work does not require battery to be disconnected for more than 30mins let vehicle sit without reconnecting battery for a 30min time window. (Also no movement of the key itself)

Reconnect battery allow system to fall back to sleep before getting the key and returning vehicle to operation.


I've follow this on all my modern vehicles and have never had issues like stated above. However before I learned this process I too had to get codes cleared and other hard resets. Just my two cents of what has been successful for me.

 

[Tazzieman]

After I foolishly let my battery go flat , after a recharge I was able to clear all error codes. Except the airbag error .