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lightning

Member Since: 23 Apr 2009
Location: High Peak, Derbyshire
Posts: 2825

MHEV battery.

ls there any way to check the status of the MHEV battery on the 3.0 diesel?

The last MHEV vehicle l drove (Suzuki) had a little indicator telling you what was going on with it. On the Defender it appears to be invisible. l can't find any way to even check it's working.

Although l assume a warning message will appear if it stops working for any reason.

27th Jun 2023 6:33pm

Moo

Member Since: 01 Oct 2021
Location: UK
Posts: 1394

I had it on my XC90. Interesting but of no real value. Eiger Grey MY23 D250 SE with bits. Known as Noddy.

27th Jun 2023 9:34pm

whiterdesign

Member Since: 10 Jun 2021
Location: Preston
Posts: 269

If start stop works ok , MHEV battery ok . full Stop!!! 110 XS 250 MY 23 Gondwana Stone, Cold climate pack and towbar

27th Jun 2023 10:52pm

lightning

Member Since: 23 Apr 2009
Location: High Peak, Derbyshire
Posts: 2825

Well, l guess it's working then !!

Thank you. l didn't realise the start/stop depended on it.

30th Jun 2023 10:22pm

markb110

Member Since: 22 May 2010
Location: Guildford
Posts: 2642

Only worry if you are the third owner……

1st Jul 2023 7:53am

lightning

Member Since: 23 Apr 2009
Location: High Peak, Derbyshire
Posts: 2825

So when the MHEV battery fails the stop/start no longer works? Bring on battery failure!!

3rd Jul 2023 6:44pm

Nashvegas

Member Since: 25 Dec 2021
Location: Portland, Oregon
Posts: 40

There is actually, sort of a way to look at the battery %, at least if you have a P400 gas motor and a Gap IIDTool.. I found a setting that shoes you the "MHEV battery charge %". I think there's a couple other readings showing "desired MHEV battery charge" and something else.

Oddly my Defender seems to keep mine "charged" around 53% or so. If I floor it or drive uphill rapidly, I watch the % go down. Then it'll go up above 53% if I'm not hooning it around.

4th Aug 2023 3:59pm

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