Help identifying a cable by battery

T

TacticalBrick

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T6 Pro
I took my van for a new battery under warranty as it was struggling to start. The auto stop/start was working but sporadically. However, since the battery was changed, it now shows an error on vehicle status "error: auto stop/start".

Scanning with Carista shows the error U105000 - Battery Monitoring Control Module: No communication. This has only occurred since the battery was changed. The dealer has said they need it back for the day next week, but I had a look and I noticed there a wire that's not connected to the battery.

Before I go connecting something I shouldn't, can any identify the cable and if it would be related to the auto stop/start not working and the error code above?

PXL_20251019_084932742.webp

PXL_20251019_084912086.webp

PXL_20251019_084902361.webp
 
take a pic of tghe battery NEG terminal.

there shouldnt be any extras cables attachyed.

so whats this wire?

1760865699290.webp

..


there is a sensor on the NEG battery post. . . . take a pic of that.
 
B

Thread 'Loose wire in the engine bay'

I noticed this loose wire in the engine bay, next to the battery the other day when I was topping up the fluids. Short of going to a auto electrician does anyone know if it should be attached?

Boo is a 2001 T6.1 150 Startline with the business pack and has been converted with the addition of a leisure battery & Victron kit.IMG_9195.webpIMG_9194.webp
Bealsy

Thread 'Start/stop error'

Hello All, We have recently invested in 2021 Kombi DSG T32 6.1 on 70k miles and are looking forward to the adventures this brings for the family.
Question I have is it thrown up a start/stop error that I thought maybe battery related. Took it to Halfords this morning for a battery check and they say it’s all in good order. Whilst under the bonnet I noticed a lead with a ring crimp not connected. Wondered if you helpful bunch could let me know what this is for and does it need connecting? I’ve attached a couple of photos.
Sorry this is my first post on the forum so let me know if I have...
 
mmi said:
B

Thread 'Loose wire in the engine bay'

I noticed this loose wire in the engine bay, next to the battery the other day when I was topping up the fluids. Short of going to a auto electrician does anyone know if it should be attached?

Boo is a 2001 T6.1 150 Startline with the business pack and has been converted with the addition of a leisure battery & Victron kit.IMG_9195.webpIMG_9194.webp
Bealsy

Thread 'Start/stop error'

Hello All, We have recently invested in 2021 Kombi DSG T32 6.1 on 70k miles and are looking forward to the adventures this brings for the family.
Question I have is it thrown up a start/stop error that I thought maybe battery related. Took it to Halfords this morning for a battery check and they say it’s all in good order. Whilst under the bonnet I noticed a lead with a ring crimp not connected. Wondered if you helpful bunch could let me know what this is for and does it need connecting? I’ve attached a couple of photos.
Sorry this is my first post on the forum so let me know if I have...
Click to expand...
Brilliant thank you. I'll get it reconnected later.
 
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Reactions: mmi
TacticalBrick said:
I took my van for a new battery under warranty as it was struggling to start. The auto stop/start was working but sporadically. However, since the battery was changed, it now shows an error on vehicle status "error: auto stop/start".

Scanning with Carista shows the error U105000 - Battery Monitoring Control Module: No communication. This has only occurred since the battery was changed. The dealer has said they need it back for the day next week, but I had a look and I noticed there a wire that's not connected to the battery.

Before I go connecting something I shouldn't, can any identify the cable and if it would be related to the auto stop/start not working and the error code above?

View attachment 306763

View attachment 306764

View attachment 306765
Click to expand...
My van has that wire connected to the battery treminal - It does stop the Stop/start from working if disconnected.
There is another thread on this forum about it.
 
Dellmassive said:
The sensor on the battery will not account for the power the tracker is using.....
Click to expand...
Hi @Dellmassive

thank you very much for your input and advice,I stand guilty too, as I had wired a tracker in across the battery terminals. So I have moved it as advised this morning.

However there is another wire attached to the neg terminal. Is it advisable not to have any attached?

I haven't put this here, or any knowledge at the moment what its from. I can explore this myself or I'll go and ask the previous owner as he had a lot of work completed on the van.

thank you for all your advice and knowledge sharing on here, very much appreciated..A

Ali
 
Pauly said:
Post a picture
If it’s not factory then it shouldn’t be connected directly to the battery
Click to expand...
battery terminals.webp

Many thanks its the brown wire to the nut......(also a small box with a brown neg into it)...

Off the top of my head he has had : Lazer front lights: Internal rear ceiling LEDs: Alpine audio kit under seat and extra 12v and usb supplies in the rear.

I can pop and ask him, hes a really nice guy and very helpful with advice. He also told me where he had work done on the van, also local and very nice guys.

But any advice appreciated....more importantly knowing why not to do it in future, as it wasn't something I even contemplated when I put the tracker on

Cheers to all

Ali
 
Just to feed back, I reconnected that cable and the error went away. S/S still barely works still, but there's no longer a status message saying it's erroring and there aren't any error codes showing on a scan.
 
aliwhitevanman said:
View attachment 306816

Many thanks its the brown wire to the nut......(also a small box with a brown neg into it)...

Off the top of my head he has had : Lazer front lights: Internal rear ceiling LEDs: Alpine audio kit under seat and extra 12v and usb supplies in the rear.

I can pop and ask him, hes a really nice guy and very helpful with advice. He also told me where he had work done on the van, also local and very nice guys.

But any advice appreciated....more importantly knowing why not to do it in future, as it wasn't something I even contemplated when I put the tracker on

Cheers to all

Ali
Click to expand...
This brown wires need morning over to the light bracket....

Screenshot_20251020_165531_Chrome.webp
 
TacticalBrick said:
Just to feed back, I reconnected that cable and the error went away. S/S still barely works still, but there's no longer a status message saying it's erroring and there aren't any error codes showing on a scan.
Click to expand...
The van will need 10 drive cycle it's so to recalibrate the power system. ... Keep calm and drive.

The stop start will kick back in when it can see the starter battery is fully charged.
 
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