complete shutdown engine and electrics while driving !!!!!
IM hoping someone can help
recently, in sub zero temperatures, my disco3 has been hard to start, but other than that has been running fine.
Last night, while coming back from visiting friends, at midnight on a dual carriageway the entire disco shut off! I lost ALL lights, dashboard, engine, radio, heated seats - the lot!!!! It was light someone had literally turned the key to the off position in the middle of driving!!!
We coasted to the side of the road, and i turned the key again and the dash came back on, with RANGE of 0 and fuel gauge light on and showing fuel tank empty. As i was unable to restart the engine while in D i stopped and went to P, when the engine started completely fine and lights etc all came back on. The milometer was still correct so that did not reset.
NO error messages or EML came on at any point. As the range was 0 and showing empty tank, i crawled the next 5 miles to the petrol station, only to find the range and fuel gauge climbing back up slowly, as if the ECU had reset.
The car behaved fine the rest of the way. We plugged in a dongle today and other than a circuit failure with selection of D1/D2 ( which we never use ) no error codes came up. I suspect the D1/D2 issue is because perhaps previous owners had spilled liquid into the transmission selection area.
We recently changed the battery for a new one, as we thought this was the cause of the cold start problem - as we were getting ' transmission fault ' messages as if battery was low, however while it did improve things for a while, we still have the issue when car been sat for more than 24 hours and temperatures are 2* C or below
We were very lucky that we did not have an accident - the road was very quiet, as losing all lights would have meant we would have been very hard to see and road was unlit.
Any ideas?
Thanks!
12th Feb 2017 5:17 pm
Narpy
Member Since: 18 Jul 2011
Location: Stockport
Posts: 7830
You need to get the codes read..............properly.
Also, check you've tightened the battery connectors correctly when you changed the battery as sudden total loss of all power implies something may be loose.
Lastly, find out what your alternator is doing by putting a multimeter across the battery with the engine running as it does seem to still have a power issue.
Good luck with it. Mods:
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12th Feb 2017 5:43 pm
dxa
Member Since: 25 Aug 2016
Location: MK
Posts: 30
Thanks Narpy!
Though if it was the alternator surely it wouldnt just start back up fine and behave fine? has done around 50 miles around town today ( we stayed local just in case ) and no issues?
Battery connection terminals are fine. As far as i know, we ' properly ' read the codes - perhaps you can elaborate on what you mean? Obviously ones from the past ( transmission fault ) on cold start were there too but nothing from yesterday.
Will check the alternator though, thanks!
12th Feb 2017 7:13 pm
Narpy
Member Since: 18 Jul 2011
Location: Stockport
Posts: 7830
Find someone who has an IID tool and get the codes read.
The cheaper generic readers won't read everything and always miss the bits you need the most.
Check the main earth strap is still intact and not corroded where it joins the body as this has also been shown to give the symptoms you're having.Mods:
Front Fogs + Halos
FBH Remote Control
The 1st Ever RRS Modded Grill
Garmin Nuvi + D4 Surround + Reversing Camera.
D4 Steering Wheel.
Rear Boot Spoiler.
Twin Brake Lights.
Wing Mirror Indicator Repeaters.
Long Roof Rails
Make your own Narpy grill thread
I'm not scared, I'm outta here.
12th Feb 2017 8:05 pm
Robbie
Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
Posts: 17932
The fuel gauge is as simple as it gets - just a resistance value sensed by the IPC. Given this and the nature of the shutdown I'd start the diagnostics with the IPC in the front of my mind.
Land Rover - Turning Drivers into Mechanics Since 1948
Ah ok thanks - we used just a normal ODBC with wifi network and app on phone - it did kinds of have a bit of a meltdown when we plugged it in ie lots of warnings etc - tho it was fine once we had finished.
interesting regarding the IPC - tho why would that cause the engine to shut off as thw two arent connected that i know of?
12th Feb 2017 9:51 pm
Robbie
Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
Posts: 17932
A generic OBD device just won't touch the sides of a D3/D4; they have distributed systems with over 20 ECU scattered around the vehicle.
The IPC has to be connected to the engine ECU (and others), otherwise it would be a pretty rubbish display when it came to displaying parameters, warning information or faults. In this case the IPC is a key component on the vehicle's CANBUS if it has a heart attack the brain takes a pounding too.
I've not tried it but I believe Mike has thumped the top of the binnacle to both 'fix' and 'trigger' such a fault in the past.
Good luck.
Land Rover - Turning Drivers into Mechanics Since 1948
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