thats weird...the 2013 to 2015 had aux batterys and from then i thought they went with the capacitor setup like mine....

if you have a main battery in the floor well by the compressor then you then have an aux battery [as in your pic]
you can just disconnect the earth terminal and isolate it , ie wrap it in tape... ... - .- -.




Y. O. L. O.
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edit, just read the WM and it seems that 4.4 engines have the aux battery.. ... - .- -.




Y. O. L. O.
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so disconnect here and wrap? as you may have gathered i don't have a clue but this start/stop is really annoying me.

 --
On my third Full Fat RR
there's nothing like it.

yep.....if it causes any problems,which I'm pretty sure it won't ,you then reconnect... ... - .- -.




Y. O. L. O.
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I know this thread is about getting stop/start not working but I want mine to work and it won’t.

I know you guys don’t like it, but I’ve only just bought the 13 month old car and I want everything to work.

The dealer said it was the main battery and they’d charged it. I didn’t buy their explanation so I checked the Aux battery when I got home and it says 0% charge and 7.2v so it’s either
a) fooked
B) not charging

How can I tell if it’s receiving a charge ?? Wot's that in old money

It will be battery related!

Remove the batteries and bench charge them! Then refit them and check voltages whilst running...

Yep got that it’s battery related

The main battery is 98% charged and 13.8v so I’m happy with that.

The Aux battery after 2 hrs of charge is 10% charged and 10.2v. That’s just not right.

I don’t want to fix it, it’s under warranty, I just want to tell the dealer that they’re talking sh*te and it’s the aux battery not the main one, rather than them blaming the main starting battery again. I’m evidence gathering, I guess. Wot's that in old money

If you disable the Stop Start on the 4.4 it will also disable your heated seats 2021 L405 Vogue SE 4.4 V8 DIESEL ~ #17

hasnt on mine...in fact everything works as it should.. ... - .- -.




Y. O. L. O.
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It will Stan - yours is the V6 - it’s the SDV8 the heated seats stops working on 👍🏻 2021 L405 Vogue SE 4.4 V8 DIESEL ~ #17

interesting..i wonder if any other 4.4 owner has this problem.. ... - .- -.




Y. O. L. O.
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Following on from this. Has anyone done a diag/iid tool scan after disconnected the aux battery?
We have customers L405 3.0 V6.
Fault codes

U0447-00 Invalid data received from gateway A
Also code for Aux battery.

DPF keeps getting full.
Vehicle conditions incorrect for regeneration.
Just eliminating that possibility from equitation.

ive never had a dpf warning since the mod and never since ive had mine...

everything works as it should.... ... - .- -.




Y. O. L. O.
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Do you have fault code for battery when you scan vehicle?

mines a capacitor so no battery fault code. ... - .- -.




Y. O. L. O.
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