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DISCO3.CO.UK > Faults & Fixes (D4)

Alternator Issue D4 2010

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Gareth22

Member Since: 12 Aug 2018
Location: Ipswich
Posts: 27

2010 Discovery 4 3.0 TDV6 HSE Auto Ipanema Sand

Alternator Issue D4 2010

Couple of weeks ago charging system warning on dash and error code P065A-00 read on IID, no output from alternator when measured across battery. I have changed the alternator out today and the warning still lights up after a few seconds. However when the engine is revved the battery light goes out. When the revs drop after a couple of seconds the battery light and warning re appears. This wasn't the case before I changed the alternator.

Before I book into the garage on Monday is there anything I may have missed or could check

7th Nov 2020 5:44 pm

Andyyav

Member Since: 22 May 2019
Location: Norfolk
Posts: 304

2010 Discovery 4 3.0 TDV6 XS Auto Stornoway Grey

I’d check the battery voltage before starting and then when running, your battery may be depleted as the alternator hasn’t been charging correctly, also not sure if it’s still possible with the technology on these but in the past I’ve heard of duff battery cells damaging alternators

7th Nov 2020 6:58 pm

Gareth22

Member Since: 12 Aug 2018
Location: Ipswich
Posts: 27

Andy

Tried a replacement battery that was fully charged. Voltage before connecting is 12.6v when the car is started the voltage drops and doesn't rise

8th Nov 2020 9:43 am

Biffysun

Member Since: 09 Jul 2011
Location: Central
Posts: 1790

2016 Discovery 4 3.0 SDV6 SE Tech Auto Corris Grey

Was it a genuine Denso?

8th Nov 2020 10:23 am

Gareth22

Member Since: 12 Aug 2018
Location: Ipswich
Posts: 27

It was purchased from AF on their recommendation,

I don't remember a label on the new one like the old one

8th Nov 2020 11:22 am

eightfoot

Member Since: 12 Apr 2015
Location: sunny essex
Posts: 806

2005 Discovery 3 TDV6 S Auto Bonatti Grey

did you reset the batt monitoring system ?also a new alt and fully charged batt i wouldn't expect to see a charge at idle, mine often shows 12.6 at start up with a new batt as its supposed to work this way but don't get batt light

try a search as i seem to recall a similar problem to this

also check the 5amp fuse not sure what number it is please excuse any grammer/punctuation mistakes,i'm thick,thankyou
current vehicles 2005 d3 2013 d4

8th Nov 2020 11:40 am

Gareth22

Member Since: 12 Aug 2018
Location: Ipswich
Posts: 27

All sorted, ordered a replacement alternator which was a denso. While fitting noticed that the small cable on the back was not right. The cable was corroded. Cleaned up and all now working.

Not sure if it was the alternator or the cable

13th Nov 2020 5:07 pm

Biffysun

Member Since: 09 Jul 2011
Location: Central
Posts: 1790

as long as its working

13th Nov 2020 5:20 pm

Gareth22

Member Since: 12 Aug 2018
Location: Ipswich
Posts: 27

Was strange to drive again after spending 3 weeks in a fiesta borrowed from the mrs

14th Nov 2020 7:49 am

Andyyav

Member Since: 22 May 2019
Location: Norfolk
Posts: 304

Any port in a storm eh!!

14th Nov 2020 7:17 pm

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