 | Home > Puma (Tdci) > Puma won't start after smoking! |
 
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| carbuncle Member Since: 17 Aug 2020 Location: Wales Posts: 9  
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Hi, I wonder if anyone can help with my farmers spec Puma please. Started it a few weeks ago and smoke appeared in the cab, not sure where it came from, panicked and switched off pretty quickly! I have taken out the dash and found the main power lead to the ignition switch melted at the connection to the switch. I have changed that, cleaned all the other terminals. It now refuses to start
 On the first turn of the key it fires up and immediately stops again, from then on it doesn't even turn over. Wondering if has damaged the immobiliser ecu?
Another clue, the handbrake cable has now seized too! |
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17th Aug 2020 1:37pm |
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| Martin Site Admin Member Since: 02 Apr 2007 Location: Hook Norton Posts: 6612 
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Have you refitted the instrument pack?
 1988 90 Td5 NAS soft top
2015 D90 XS SW |
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17th Aug 2020 3:22pm |
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| carbuncle Member Since: 17 Aug 2020 Location: Wales Posts: 9
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Hi, thanks for the quick reply, i'll check all the earths tomorrow and report back.....
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17th Aug 2020 4:12pm |
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| carbuncle Member Since: 17 Aug 2020 Location: Wales Posts: 9
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Yes, the instrument pack is connected. Will it start without it? It doesn't make a difference either way at the mo... |
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17th Aug 2020 4:39pm |
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| carbuncle Member Since: 17 Aug 2020 Location: Wales Posts: 9
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All the earths look good, no one has been fiddling with them! I have fitted an extra one from chassis to body and battery to cover all possibilities. Nothing seems to make any difference! tried new relays too - just in case, but still nothing. Always fires up and sounds like it's going to go on the first pull, then stops and then nothing.
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18th Aug 2020 12:03pm |
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| Martin Site Admin Member Since: 02 Apr 2007 Location: Hook Norton Posts: 6612
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Remove the instrument pack connector, and with a unfolded paperclip or similar bridge pins 3 and 4. Don't refit the connector, now try and start.
https://www.defender2.net/forum/post814212.html#814212 Martin 1988 90 Td5 NAS soft top
2015 D90 XS SW |
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18th Aug 2020 1:19pm |
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| carbuncle Member Since: 17 Aug 2020 Location: Wales Posts: 9
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Thanks Martin, I'll give it a go ad report back
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18th Aug 2020 1:34pm |
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| carbuncle Member Since: 17 Aug 2020 Location: Wales Posts: 9
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No, still nothing
. Having read through the other post I then checked the rev counter, that flickers when starting. I have now got the ecu off, checking the wiring, all looking good so far.
I have got access to another puma, can I swap the 10as units over to give it a try, or are they coded to the ecu? I will check for fault codes too... |
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18th Aug 2020 2:34pm |
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| Martin Site Admin Member Since: 02 Apr 2007 Location: Hook Norton Posts: 6612
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Hmmm.
Reason I went down that route is that start and then immediate stop can mean that the 10AS is happy for the engine to crank, but the ECU isn't receiving the de-immobilise code from the 10AS. The bridge between 3 and 4 eliminates the possibility of the instrument pack being the cause of this break. ECUs are coded to 10AS units, so you can't just swap between them. Assuming it's a 2.4 Puma (you haven't said) check fuses 6 and 7 (in the seat box fuse box) and fuse 8 in the bulkhead fuse box. 1988 90 Td5 NAS soft top
2015 D90 XS SW |
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18th Aug 2020 2:55pm |
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| carbuncle Member Since: 17 Aug 2020 Location: Wales Posts: 9
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Yes, apologies, it is a very basic 2.4, no central locking, no ABS, manual windows, no key fob, very basic. it does have a coil around the ignition barrel though, does that mean the key has a chip in it? Could that cause a problem? It does have a very rough life!!
Which is the wire to the ecu from the 10as? I'd like to check it for breaks/burning etc Fuses are all good and no fault codes coming up. |
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18th Aug 2020 4:01pm |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17466 
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I believe that on the farmer spec vehicle with no central locking and no "plip" on the key that the coil round the lock barrel does nothing.
The ECM is connected to the 10AS via the IPAC and the connector that Martin suggested you link. There is no direct connection between the two. |
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18th Aug 2020 5:54pm |
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| carbuncle Member Since: 17 Aug 2020 Location: Wales Posts: 9
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Oh, thank you. Can I test that the immobiliser code is getting to the ecu? Maybe I just need to strip it out and look for damage?
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19th Aug 2020 7:58am |
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| carbuncle Member Since: 17 Aug 2020 Location: Wales Posts: 9
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Stripped out as much of that wire (green/grey) as possible, no sign of damage and have now soldered in a replacement, still dead
I guess that means the immobiliser is fried and there is no signal to the ecu in the first place. Anybody got a magic wand???
!!!!I just need it to start!!!! Never gonna have a 2.4 again, I want to partex it for a TD5!! |
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19th Aug 2020 3:13pm |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17466
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Pete Bell as BAS has a way to eliminate the immobiliser completely and, I think, delete the 10AS altogether. It might be worth giving him a call.
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19th Aug 2020 4:01pm |
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