Member Since: 25 Jan 2022
Location: Leicestershire
Posts: 7
Discovery 3 Engine Management System Fault
Hello guys & gals, hoping you can help with my Discovery 3. It died suddenly on my whilst on my into work in Feb and I'm only just getting round to looking at it.
What happened:
Driving along no errors.
Engine system fault, within 30m car engine had died.
Ignition turns on, reports engine system fault.
Car turns over but does not start.
What I've tried so far:
Scanned with a standard OBD reader, nothing useful reported.
Removed battery, charged fully and reattached.
Bought a iCarsoft diagnostics tool and retrieved the follow errors (I'm hoping some are because it hasn't started since they say pending!):
Can anyone shed any light on where to start?[/list]
19th Apr 2024 8:21 am
Worms
Member Since: 24 Sep 2023
Location: Highlands
Posts: 270
A lot of that list looks like a major electrical failure. I wonder if the alternator has packed up? I think others have reported a similar, sudden stop like yours when the alternator has died.Previously:
2010 FL2 TD4e GS
‘93 Defender 110 200TDi CSW - still got this, non-runner on SORN.
‘87 Defender 90 4 cyl Petrol
‘83 110 CSW V8 - best ever!
Range Rover 2-door V8 (not sure of year - 4-speed box and vacuum diff switch)
Series III SWB Diesel
19th Apr 2024 8:50 am
AnotherWill
Member Since: 25 Jan 2022
Location: Leicestershire
Posts: 7
Thanks Worms! That's interesting, I didn't think it would crank if the alternator had died?
19th Apr 2024 9:04 am
Globetrotter448
Member Since: 21 Mar 2017
Location: Londonderry NSW
Posts: 1783
These vehicles require plenty of volts. Check the battery voltage with nothing switched on, should be around 12.4 volts. Anything less, charge the battery first.
19th Apr 2024 9:11 am
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 13670
Plus 1 with regards to the battery needing to be around 12.6 Vdc with the engine off
As you’ve taken details of the errors I would clear all of them, see if it will start , if not then rescan it to see what comes back
Also believe the U codes can normally be ignored , would u also be so kind to fill in ur profile please to let us know what engine , year etc D3 u have plse , many thks
Hope that also helps
19th Apr 2024 9:19 am
AnotherWill
Member Since: 25 Jan 2022
Location: Leicestershire
Posts: 7
I did replace the battery in June last year, so I guess it could be defective but feels unlikely. I've got a battery tester and multimeter, so I'll try and get out today to test it.
Profile now filled out, but for completeness here it's a Discovery 3 SE Tech with 2.7TD engine and automatic gearbox.
19th Apr 2024 11:09 am
Martin Site Admin and Owner
Member Since: 06 Nov 2004
Location: Hook Norton
Posts: 18457
Camshaft sensor fault jumps out from that list.
Transfer case also reporting stuck clutch actuator, but I would not have thought that would cause a failure to start.06 D3 SE / 15 LR D90 XS SW / 88 LR 90 Td5 / 68 BMW 2000 ti
Any issues with the site let me know!
19th Apr 2024 11:14 am
PROFSR G
Member Since: 06 Mar 2017
Location: Lost
Posts: 4674
As above, camshaft/timing belt failure. Check the front timing cover just to the upper left of the crank pulley for any sign of damage. Or better still remove it and check the condition of the belt, cams, and oil pump.
If the camshaft sensor developed a fault during engine operation the engine can continue to run as the PCM can compensate for this, but once the engine has stopped it cannot restart with a faulty sensor.yµ (idµ - eAµ) ψ=mψ
19th Apr 2024 2:03 pm
AnotherWill
Member Since: 25 Jan 2022
Location: Leicestershire
Posts: 7
Managed to have a quick look.
Fresh charged battery, no change.
Got the radiator fan out, so take a good look at the timing cover (but didn't remove aux belt and pulleys). I couldn't see any damage, but took a picture for more seasoned eyes than mine.
Click image to enlarge
Click image to enlarge
Looks like it's the camshaft position sensor, unless there's anything else to try.
21st Apr 2024 5:50 pm
PROFSR G
Member Since: 06 Mar 2017
Location: Lost
Posts: 4674
Can you turn the engine at the crank one full turn?yµ (idµ - eAµ) ψ=mψ
21st Apr 2024 6:58 pm
AnotherWill
Member Since: 25 Jan 2022
Location: Leicestershire
Posts: 7
Yep, can turn one full turn at the crankshaft.
23rd Apr 2024 6:26 pm
PROFSR G
Member Since: 06 Mar 2017
Location: Lost
Posts: 4674
Much of the fault codes are likely to be a "cascade" usually caused by low voltage, and some may be historic.
Clear all of them and try two or three start attempts with a fully charged battery. Then read the codes again and post what comes back. It would be helpful if you could fill out your profile fully so we know exactly which model/type year vehicle we're dealing with. yµ (idµ - eAµ) ψ=mψ
23rd Apr 2024 6:56 pm
AnotherWill
Member Since: 25 Jan 2022
Location: Leicestershire
Posts: 7
Whoops, thought I had my profile filled out but I had missed the colour so it didn't show sorted now.
Battery was only taken off charge at the weekend but I am going to put it on charge again tonight. In the mean time I've cleared the faults, some faults like ATCM wouldn't clear fully.
After trying to start 3 times, read the codes as follows:
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