04194 - Vehicle Status with Under-Voltage fault after flat battery

[Led Sandwich]

Hi there im failry new to VCDS and have just purchased a t6 transporter moving on from an older 1.9tdi caddy so to say im gettign used to modern electroincs is an understatement. This week i was faced with a flat battery so i have replaced that and belive i have coded it correctly. Im getting no error messages on the dash and start stop is working. before chanign the battery it had gone dead flat so sounded the alarm and i had a lot of fault codes. i have cleared these and all but one have gone which im unsure if its related or not. Has anyone ever had this fault before?

To replace the battery

I replaced my onld 70ah battery with a new yuasa 75ah battery this was done by going into 61 Battery Regulation and the long adaption changing my code from
070 MLG 1111111111 to
075 MLG 1111111112

The code i have remaining is 04914 and a log from VCDS is below;
Address 09: Cent. Elect. Labels: 7E0-937-BCM-V1.clb
Control Module Part Number: 7E0 937 090 C HW: 7E0 937 090 C
Component and/or Version: BCM PQ25 Max4 H82 0752
Software Coding: A0FC793A0A61341393284F646CEB8EF40D84718960CC6D603304003F0840
Work Shop Code: WSC 02739 534 268957
VCID: 2B030B6F330F05328A1-807E
1 Fault Found:

04194 - Vehicle Status with Under-Voltage
002 - Lower Limit Exceeded
Freeze Frame:
Fault Status: 01100010
Fault Priority: 3
Fault Frequency: 1
Reset counter: 229
Mileage: 108251 km
Time Indication: 0
Date: 2018.08.26
Time: 01:24:49

From this i thought i would go for a drive and see if the fault cleared however that didn not seem to help and not did clearing the code. I have since checked the alternator for function and got the below results

Batt Voltage 12.635v
Alternator no load 12.710v
Alternatior (Load - lights and ac ) 13.412v

looking throught he ross tech wiki linked below it mentions i shoudl expect an MIL light which i dont have and checking the beolw;
04194

Possible Symptoms​

• Malfunction Indicator Light (MIL) ON

Possible Causes​

• Fuse(s) faulty
• Supply Voltage low
• Battery faulty
• Loose/faulty electrical connections
• Generator faulty

Possible Solutions​

• Check Fuse(s)
• Check Supply Voltage
• Check/Replace Battery
• Correct electrical connections
• Check/Replace Generator

As above I've checked the battery voltage and alternator but im not sure how to check the supply voltage to the BCM or the fuse however i was thinking if this had no supply then i would have other faults or issues?
The footnotes also talk about re settign the learned values, given i have no issues other than the code should i skip to this or could that cause other problems?

Special Notes​

• When found in the J519 (7E0/BCM PQ25), Address [09-Cent. Elect.], check stored value in the Adaptation Channels [050], [051] and [052] for the "Energy Management". Typically these are set to a value of [0]. If the fault code 04194 does not clear and there is no other cause found, try to [Save] a new value of [0] to each of these channels,[050], [051] and [052] in the J519, even if the value is currently [0]. Then see if the fault code clears. ref: 7E0-937-BCM-V1

Any help would be really appreciated.

thanks
aaron

 

[Deaky]

Looks like an old fault code. Did you clear any faults with VCDS after changing the battery?

 

[Led Sandwich]

It had quite a few faults across various modules which I cleared in the auto scan. this one remained and has done after a short drive and re scan / clear.

 

[mmi]

which I cleared in the auto scan

Any different if you enter directly into controller 09-Cent. Elect. and clear the fault in there?

 

[Led Sandwich]

It didnt make a difference yesterday, i am going to try and disconnect the battery and leave it then re clear the code.

 

[Led Sandwich]

Right I did some more checks this morning with no new issues or change so decided to update the learned values as per the footnotes in the above Ross tech wiki and the code is gone. I’ll see if it reoccurs but let’s hope it’s sorted

For ease if anyone gets this in the future the procedure followed was below

Special Notes​

• When found in the J519 (7E0/BCM PQ25), Address [09-Cent. Elect.], check stored value in the Adaptation Channels [050], [051] and [052] for the "Energy Management". Typically these are set to a value of [0]. If the fault code 04194 does not clear and there is no other cause found, try to [Save] a new value of [0] to each of these channels,[050], [051] and [052] in the J519, even if the value is currently [0]. Then see if the fault code clears. ref: 7E0-937-BCM-V1

 

[mmi]

decided to update the learned values as per the footnotes

Were the values initially already zeroes (0) (as they normally are on T6)?

 

[Led Sandwich]

Hey mate they were yeah, I just overwrote the zero with another zero. No idea how that helps. I’ll just have to give it a few days now and see if it returns

 

[xop32]

how do i do this with odis ??

i have a similar issue, battery went flat, now i have this code does not clear with carista on my phone, i have odis but haven't used it in a year or so now