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djpgowrie

Member Since: 04 Jun 2020
Location: Manchester
Posts: 43

2010 Range Rover Sport 3.0 TDV6 HSE Santorini Black

General Power/Electronics Issue

I've got an issue with interior lights flickering (under door/sill light & speedo/rev counter backlight) along with the trip computer auto resetting after every journey.

I had the same issue a while ago so I decided to get a new battery. This didnt fix the issue at first but then somehow weeks later the trip computer started behaving.

More recently I had an error for something like 'charging circuit' and during a trip the car's electronics slowly died one by one until I had nothing. I got a new alternator fitted which sorted it but brought back the flickering lights and trip computer reset.

Does anyone know what could be causing this with a new battery less than 12 months old and a new alternator less than a month old? Maybe a faulty ground wire? ECU reset of some sort?

Thu Jan 20 2022 3:02pm

Andy K

Member Since: 18 Sep 2015
Location: GL
Posts: 4966

2005 Range Rover Sport TDV6 HSE Rimini Red

Did you fit a genuine denso alternator. ?

If no. That’s probably it

Thu Jan 20 2022 7:42pm

djpgowrie

Member Since: 04 Jun 2020
Location: Manchester
Posts: 43

Yep - I used this one:

https://www.island-4x4.co.uk/alternator-td...30382.html

If it was the alternator I would have thought that the problem wouldnt have occured both before and after a new one. With the car having a new battery and alternator then I would hope its neither of these two?

Fri Jan 21 2022 12:17pm

Disco_Mikey

Member Since: 08 Apr 2012
Location: Dundee, Scotland
Posts: 4403

2010 Range Rover Sport Supercharged HSE Santorini Black

Did you reset the BMS when the battery was replaced?

Fri Jan 21 2022 12:49pm

Crraigymmmmm

Member Since: 06 May 2021
Location: Peterborough
Posts: 163

2012 Range Rover Sport 3.0 TDV6 Autobiography Orkney Grey

Sorry to hijack, how do you reset the BMS? I changed my battery and didnt do it. have no issues but dont want to kill it prematurely

Fri Jan 21 2022 2:18pm

djpgowrie

Member Since: 04 Jun 2020
Location: Manchester
Posts: 43

Disco_Mikey wrote:
Did you reset the BMS when the battery was replaced?

No I didn't - I've done some googling and looks like i need a £120+ IID Tool?!

Would an OBDII be able to do it?

Fri Jan 21 2022 3:57pm

Col

Member Since: 02 Sep 2012
Location: Hawkes Bay NZ
Posts: 4982

2013 Range Rover Sport Supercharged Autobiography Santorini Black

Crraigymmmmm wrote:
Sorry to hijack, how do you reset the BMS? I changed my battery and didnt do it. have no issues but dont want to kill it prematurely

I fitted a new battery to mine before shipping car to NZ and never bothered to reset the BMS, have not had any problems and still starts first time, every time and that was 5 years ago, just made sure battery was fully charged before fitting it.

Cheers
Col

Fri Jan 21 2022 8:33pm

djpgowrie

Member Since: 04 Jun 2020
Location: Manchester
Posts: 43

So I have a basic OBD2 tool that reads and clears codes with nothing else. I've done some reading and ended up going for the icarsoft LR V2.0 unit. This has the BMS feature mentioned above and after checking the documentation my model should be fine to work with it. I think this could also be linked to my problems as the new battery I bought last year is a different CCA and capacity than the original

It also has Steering Angle Sensor function which my cars been complaining about since I got it so hopefully I can kill 2 birds with one diagnostic tool!

I'll give more of an update when the tool arrives in case it's worth something to anyone else in this position.

Sun Jan 23 2022 9:20am

karlos01

Member Since: 02 Jan 2022
Location: norfolk
Posts: 309

2006 Range Rover Sport Supercharged Java Black

djpgowrie

be good to know if the ircarsoft diagnostic works as I'm looking for a diagnostic kit for my RRS sadly my brother in law has hawkey total and it not compatible with mine as can't get the dongles for it anymore

Sun Jan 23 2022 10:36am

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