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boxoftricks



Member Since: 06 Feb 2019
Location: Home Counties
Posts: 747
United Kingdom 2011 Defender 110 Puma 2.4 USW Zermatt Silver
Intermittent starting problem - 2010 2.4 Puma
A few times in the last few weeks when I come to start the 110 the starter motor spins over the engine but it does not fire. Seems to be when it's warm and has only been off for a short while (but may just be a coincidence).

If I totally turn off the ignition and try again after a few attempts it seems to start.

I've checked the immobiliser light is not on. Thought it may be a low battery in the fob but as the starter spins up unsure if that has an impact. Does the immobiliser stop the starter motor spinning of the engine from firing up?

Any ideas appreciated.
Post #909118 23rd Jun 2021 1:49pm
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cold



Member Since: 15 Dec 2018
Location: Yorkshire
Posts: 118
If the temp gauge increases to max when it just turns over then push on the relays under the driver (RHD) seat to make sure they are seated
Post #909245 24th Jun 2021 8:37am
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dorsetsmith



Member Since: 30 Oct 2011
Location: South West
Posts: 4554
LR service link re starting problems and temp gauge going FSD


https://1drv.ms/b/s!AtZSoWFHDgnGkWWX3oCmmZLsQs5-?e=TncAeE
Post #909261 24th Jun 2021 10:22am
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boxoftricks



Member Since: 06 Feb 2019
Location: Home Counties
Posts: 747
United Kingdom 2011 Defender 110 Puma 2.4 USW Zermatt Silver
Great thanks, that sounds like it may well be the problem.
Post #910115 30th Jun 2021 9:29am
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Moffett



Member Since: 08 May 2018
Location: Sligo
Posts: 69
Ireland 2008 Defender 110 Puma 2.4 XS CSW Stornoway Grey
Hi Dorsetsmith, where do you get a hold of the service bulletins?
Post #910218 30th Jun 2021 8:37pm
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Benrlelliott



Member Since: 29 Dec 2020
Location: London
Posts: 25
United Kingdom 2008 Defender 90 Puma 2.4 XS CSW Aintree Green
Following this as suffering from the same issue. Sick of embarrassing moments at petrol stations.

My go to hack is lock unlock.
Post #912635 16th Jul 2021 8:23am
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boxoftricks



Member Since: 06 Feb 2019
Location: Home Counties
Posts: 747
United Kingdom 2011 Defender 110 Puma 2.4 USW Zermatt Silver
It's been at the garage for nearly three weeks now and eventually not started for them.... . They think it may be the relay as a fault code on the ECU is saying it is not energizing correctly. If not its a ECU fault Big Cry
Post #912636 16th Jul 2021 8:27am
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Martin
Site Admin


Member Since: 02 Apr 2007
Location: Hook Norton
Posts: 6604
United Kingdom 2015 Defender 90 Puma 2.2 XS CSW Montalcino Red
Got to be worth a try bridging pin 3 and 4 on the instrument pack plug to remove the possibility of an instrument cluster broken solder joint interrupting the immobiliser signal:

https://www.defender2.net/forum/post814212.html#814212

The thinking behind this is:

On some 2.4 Pumas the 10AS unit controls the starter relay, enabling it when the immobiliser is inactive. It's not exactly clear what I mean by "some", but I believe it's most of them, with only early 2.4s have the ECU controlling the starter relay.

So, assuming this applies to you (I believe on a 2010 this is the case) this is why your engine will crank. The 10AS is allowing the starter relay to operate, so the engine cranks.

However, the ECU does not receive the de-immobilise signal from the 10AS, then it won't fire the injectors.

Therefore you get cranking, and the correct operation of the immobiliser/alarm LED but no firing.

Last year I sorted a 2010 Puma with exactly this issue, it would crank, and the RPM needle moved, but an signal tester showed the ECU wasn’t firing the injectors at all. Bridging 3 and 4 allowed it to start straight away.  1988 90 Td5 NAS soft top
2015 D90 XS SW
Post #912647 16th Jul 2021 9:09am
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boxoftricks



Member Since: 06 Feb 2019
Location: Home Counties
Posts: 747
United Kingdom 2011 Defender 110 Puma 2.4 USW Zermatt Silver
Thanks Martin. They have checked the instrument cluster and said it's not the issue. Fingers crossed it is the relay but will keep you posted so hopefully help out other folks on here.
Post #912655 16th Jul 2021 10:17am
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joe dirt



Member Since: 11 Mar 2012
Location: Staffordshire
Posts: 124
Falkland Islands 2007 Defender 110 Puma 2.4 XS CSW Bonatti Grey
Hi guys,

I’ve had this same fault on my neighbours 59 2.4 and my 07 2.4 both headache to find as I had checked everything and bypassed the instrument pack and still no joy so rang BAS and shot up there with my ecu he was mega helpful he repaired it there and then

Then my neighbours one started playing up intermittently and exactly the same as mine
Post #913310 20th Jul 2021 10:21pm
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