 | Home > Off Topic > TD5 Disco - Extreme wierdness! |
 
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| LandRoverAnorak Member Since: 17 Jul 2011 Location: Surrey Posts: 11324  
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On the face of it, it sounds like a failing alternator. It could just as easily be a duff earth connection somewhere, though. Darren
110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak "You came in that thing? You're braver than I thought!" - Princess Leia |
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21st Oct 2016 11:54am |
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| ian series 1 Member Since: 17 Nov 2014 Location: south Posts: 3127 
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You probably have already,but Have you checked the ecu plug for oil?
I've just had one that had immobilised itself. And had every warning light showing? Plug at ecu looked free from oil, but the ecu itself was swimming inside, totally shot. Strange as the car was used daily, then parked for 3 weeks. All the symptoms at first pointed to the xyz switch on diagnostics?? Replacement ecu sorted it... Good luck  80" 80" 86" 88" 90"
Wanted, Forward Control Anything considered. |
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21st Oct 2016 12:21pm |
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| excossack Member Since: 22 Feb 2012 Location: North West Posts: 5852 
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Battery on the way out? Maybe a duff cell bringing others down? 1999 Defender TD5 110
Regards John M0VAZ Econet Station 48 no clock |
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21st Oct 2016 12:39pm |
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| sgilmour Member Since: 21 Jul 2015 Location: Essex Posts: 232 
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If you've got oil in your ECU like Ian says you want to look at replacing the injector harness in the rocker cover. Only about £30 and a super-easy job to do, I've just done it on my D2 to try and fix a different issue (and failing to do so!). I'm considering it as a major service item from now on because it's a cheap precaution to a potentially expensive problem. Good luck!
SG 1994 Defender 90 300TDi 2002 Disco II ES Td5 Auto (SOLD) 2011 BMW 120d M Sport 2012 Audi A5 Coupe 2.0 TDI (Other halfs) |
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21st Oct 2016 3:01pm |
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| Alien Member Since: 18 Jan 2015 Location: Bacchus Marsh Posts: 230 
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Sound like a bad earth to me.
As the alternator has recently been changed check the earth connection below it hasn't come loose. The earth leed should go Batery->body->engine, check all the connections along it (and the positive battery terminal also). I found this lead also rubbed on the fuel cooler to radiator hoses so check for wear marks on them while your there. Cheers, Kyle. |
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21st Oct 2016 4:56pm |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17450 
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Thanks for the ideas!
I am inclined to think that it is most likely to be the alternator, the original failed a couple of months ago (not bad seeing as it had done 200k miles) so I fitted a second-hand one. I stripped and serviced it before fitting, and it looked good, but you can't be sure. I will check tomorrow that the main output lead is secure, since if this has loosened itself it might cause wierd effects. I was surprised when I came to drive home just now that everything was perfect, no lights, radio working, it was as though nothing strange had happened at all! What is on the face of it very strange is that the three amigos have cleared, since these cannot usually be reset without diagnostic tools (cycling the ignition won't clear them). I cannot really explain this at the moment I need to ponder for a while! Tomorrow I will check for stored DTCs and loose connections. It's not the oil/ecu problem since I sorted that one out permanently about 10 years ago, but I appreciate the suggestion all the same. An interesting day! |
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21st Oct 2016 5:07pm |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17450
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Just in case anyone has any further interest in these sypmtoms, or is searching this thread in the future to account for similar symptoms, I thought an update mught be useful.
After the post above the Disco behaved itself for a few days, before the next malfunction. Since by now I was running with a Nanocom attached, I was able to correlate the symptoms with falling battery voltage. This time the problem went further. Initially all was good, 14.7 volts, with no problems, A while later the '3 amigos' came on and Nanocom showed that the battery voltage was down to about about 11 volts, and, although the charge warning light hadn't come on, it was evident that the alternator was not charging the battery. As the battery voltage continued to fall (and by now I was heading for home with crossed fingers), the radio shut down and the ACE and charge warning lights came on (at about 10 volts), at about 9.5 volts the Nanocom shut down, and a short while after than the entire instrument panel shut down - no speedo, no tacho, the odometer readings remained displayed but didn't change, and all warnign lights went out - and by now the indicators also didn't flash. I don't know the battery voltage at this time, but I'd guess it was down to about 9 volts or less. What did surprise me was that the engine was still running as sweetly as ever despite all this (as must the fuel pump have been), though clearly if it had stopped there would not have been enough power left to restart it. By now I was nearly home and was driving really carefully to avoid any possibility of stalling. I eventually arrived home, parked up, and found that (of course) the engine wouldn't crank. I have subsequently replaced the alternator again and the problem seems to have gone. Interestingly the radio interference I noted in my OP has also gone. I am impressed at how the engine kept running so long as the battery flattened, and really did not expect that to happen. |
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7th Nov 2016 2:19pm |
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