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DISCO3.CO.UK > Technical (D3)

LR3 dies when turning ignition key

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CoopLR3

Member Since: 21 May 2018
Location: Adirondacks
Posts: 38

LR3 dies when turning ignition key

Intermittent problem... when I enter the vehicle interior lights and dash light up normally, but as soon as I turn the ignition key all goes dead. Starts up normally after several retries. Battery is fully charged and fairly new. Battery wires look good. iiDTool found this code:

B1A87-68 (2F) Battery disconnection/electronic control unit reset - Algorithm based failure - event information

Is this a known issue? Any ideas?

9th May 2022 9:00 pm

Bicycle repairman

Member Since: 18 Sep 2019
Location: Cumbria
Posts: 158

2010 Discovery 4 3.0 SDV6 GS Auto Galway Green

I'd start with checking the earth leads to engine from body these can corrode and eventually snap also make sure your battery connectors are not worn. A simple test for the earth leads is put a jumper cable directly from the earth terminal to the engine block it this solves the problem poor earthing is the fault.

This is not an exhaustive list other problems could also be poor starter, immobiliser issues etc D4 GS let the retro fit begin
Heated steering wheel
Aftermarket TPMS
Double Din head unit satnav and TV
Reverse Camera
Cubby fridge
Door panel upgrade
Mood lighting
Digital Dash personalised
Back lit sun visors
4.5 Facelift front, rear and memory mirrors
Stainless bumper tread plate
6 pot Brembo conversion
HSE heated memory seats
Retro fit auto lights and wipers
LR 663 Defender alloys
275 45 20 GG AT3s
quarter of a D3

9th May 2022 9:16 pm

CoopLR3

Member Since: 21 May 2018
Location: Adirondacks
Posts: 38

Thanks, I refreshed the ground to body connections and the negative battery cable 2 years ago. I'll try the jumper test and recheck the grounds. I also think I'll start bringing the spare key fob with me and see if it works when the other doesn't.

9th May 2022 9:47 pm

aja4x4

Member Since: 14 Apr 2019
Location: Westbury
Posts: 2459

2005 Discovery 3 TDV6 SE Auto Zambezi Silver

It may also be a faulty ignition switch Andrew

D3 2.7tdv6 2005
D4 3.0 SDV6 Commercial died and gone to LR heaven
D5 3.0 SDV6 HSE

10th May 2022 6:14 am

CoopLR3

Member Since: 21 May 2018
Location: Adirondacks
Posts: 38

Thanks for the tips. I couldn't find any info on testing the ignition switch, but I did find the positive battery cable terminal had worn. The conical washer system only tightens the top of the terminal. which allowed the bottom of the terminal to loosen up. Filing the gap wider helped tighten it a little but not enough. In the end I shimmed between the cable terminal and the battery post.

I'll keep it home for a few days and keep starting it till I'm satisfied this was the problem. If so I'll order a new positive cable terminal... part#YQE500310

11th May 2022 12:39 am

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