Omega Owners Forum
Chat Area => General Car Chat => Topic started by: DrAndyB on 16 February 2020, 16:23:02
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Hi there,
I am trying to help somebody with a battery issue on a 2016 Skoda Fabia Monte Carlo.
On looking in the engine bay, I note there is a small plastic module with a small sensor/monitor wire plugged into it. Lead disappears into the loom. Main battery negative is then bolted to body just by the battery.
Does anyone know what the small module and wire is on the battery wire at the negative terminal end, and what the little wire plugged in is monitoring ?
I am curious. If Google part number 1K0915181H then that shows a picture :y
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Guessing it's just a moulding to cover were the cable joins the terminal, so you don't see two screws clampi,ng the cable,
Or it has a choke in there??
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It's the small plug that is plugged in there "Sensing" something on the terminal which is odd :-\
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This one shows the sensor wire plugged in :y
https://dalys.lt/en/autodalys/vw/passat-362-b7-2-0-tdi-103-kw/battery-cable-ends/2816437 (https://dalys.lt/en/autodalys/vw/passat-362-b7-2-0-tdi-103-kw/battery-cable-ends/2816437)
Curious.... :-\ :-\
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If the vehicle has Stop/Start function, it could be the battery voltage monitor. This monitors the battery condition so that if the voltage drops too low it switches off the Stop/Start function to keep the vehicle running.
On my Beemer it has an additional box/terminal in-line on the battery lead. This relies on crash sensors though, as in the event of a serious collision this terminal blows apart to disconnect the battery to hopefully prevent the occupants from getting fried. This terminal has a lightening strike symbol on though.
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That would tally - it does have Stop Start.
They keep getting "Low Voltage" regularly now as a warning, and after charging the battery with a separate charger standing voltage this morning was 12.3, and when opened door just he lights and other clicking or electronics I could hear under the bonnet was enough to drag it to 12.00. I think battery if goosed. I checked also with engine running, and pushes it up to over 14V so its definately charging.
Cheers for solving what the connectors is.
INterestingly, if press an hold the Odometer Trip you can get a "SOC Battery Status" idicator appear on the dash, bit it was reporting a status of "--" which aint good ! However, I can't see in the book any mention of the the Battery Status feature (as I found the trick in the Octavia book) as car in question is a Fabia, so wonder if the feature is there, and accessable if press the right button, its just it has not been enabled in the Fabia model ?
Will see how it goes, if starts complaining again of low battery, then new Battery is going on.
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I just came across an eBay advert for the part number that you supplied.
It says:
"Original connection cable for the negative pole of the battery
with sensor for battery charge status
for vehicles with start-stop operation"
:y
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:y :y Mystery solved :y :y
Thanks
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Run through Kevin's excellent starting/charging guide before condemning battery or alternator. ;)
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Its not a voltage sensor at all, you can do that reasonably reliably at many points in the vehicle.
Its a charge current sensor, it allows monitoring of the charge/discharge of the battery which, in turn, allows an estimation of battery capacity and life.
Its also used, on some setups, to allow controlled charging such that under braking the charge current is raised to maximum as a form of energy recovery/regenerative braking
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Its not a voltage sensor at all, you can do that reasonably reliably at many points in the vehicle.
Its a charge current sensor, it allows monitoring of the charge/discharge of the battery which, in turn, allows an estimation of battery capacity and life.
Its also used, on some setups, to allow controlled charging such that under braking the charge current is raised to maximum as a form of energy recovery/regenerative braking
Interesting - I had suspected that but wasn't sure. :y
So with the SOC reading on the dash (when press and hold the trip zero in) giving a value of "--" would that suggest the sensor is goosed ? any maybe why battery seems to be depleted as it's interfering with the charging ? Not sure as mentioned if the SOF facility is enabled anyhow as I got the trick from an Octavia and different model all togetgher (which does mention it in that manual, but one for the Fabia and this car not mention the facility ;D
A good charge of the battery with a separate charger however resulted in a standing voltage when taken off charge 24hrs later of only 12.3 V, and dropped to 12.0 in a few seconds when door opened. It had settled to a trickle charge at 12.6 V before taking off and dropping pretty quickly to 12.3 :(
Battery I think is not at its best - 4 years old and an EFB type battery, so would have hoped for more.
Will see how it develops :o
Cheers again all.
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Sounds like the battery is either not fully charged or in poor condition.
Could be that the car expects to see an AGM battery and doesn't like the characteristics of the EFB one.
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Could be that the car expects to see an AGM battery and doesn't like the characteristics of the EFB one.
Father-in-Law has had the car from 4 months old, and it's not been changed, unless they fitted the EFB at the Factory and it should be a AGM one :D :D
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If it charged to only 12.3V and then dropped to 12V on door opening, the battery is shot
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Thanks to all for help. A new battery has now been fitted with a better quality one which was on there.
Will see how things progress.