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Ianh

Member Since: 17 Sep 2018
Location: Essex
Posts: 2034

Good to hear you got to the root of the problem, and nice tips on the ignition switch replacement.

25th May 2022 4:40pm

Simon765

Member Since: 03 Aug 2022
Location: Scotland
Posts: 1

Martin wrote:
If the rpm needle moves during cranking it probably isn’t the crank sensor.

The "shunt" is actually a bypass of the wiring of the immobiliser comms link through the instrument pack.

Land Rover did this themselves when the 2.2 was introduced.

You need to access the instrument pack connector, remove it and make a temporary link between pins 3 and 4 with the likes of a straightened out plain metal paper clip.

If it now fires, your problem is the immobiliser link and you have two options:

Send the instrument pack for repair of the soldering of the socket to the PCB (I can do this for you through my business) - or do it yourself if capable

Alternatively dismantle the connector and remove pins 3 and 4 (light green and grey wires to both) and join them permanently. Or if you like, cut the light green and grey wires where they enter the connector and join the loom sides together permanently, bypassing the cluster.

This makes the comms link between the 10AS alarm/immobiliser and the ECU a single wire without the instrument pack in the circuit (as per the 2.2).

The instrument pack will now log a fault if diagnosed as it does not see an incoming signal from the immobiliser, but this does not affect the instrument pack or vehicle operation whatsoever.

Also I feel this is NOT a security issue as the immobiliser itself is not bypassed, and this factory design of "in and out" wiring via the instrument pack only means that the engine won’t start if the instrument pack is missing.

However a missing instrument pack would be no problem for a thief as bridging 3 and 4 (on the now easily accessible connector) restores the link, which is clear from the wiring diagrams.

I fixed a 2010MY basic spec Puma with this issue last week. 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

Tracked mine down thanks to this post, bridged 3 & 4 and it started first time👍 Is the instrument cluster issue some dry joints or is it something more involved? Just trying to decide which way to go to fix it. Also, if the cluster is repaired, is it a weakness that is likely to occur again?

Thanks

Simon

3rd Aug 2022 1:47pm

spudfan

Member Since: 10 Sep 2007
Location: Co Donegal
Posts: 4708

2.4 2008 Puma non start this evening. Tried two sets of keys and locked unlocked etc but nothing. Over the years it happened once or twice but always started with the lock/unlock fix. 1982 88" 2.25 diesel
1992 110 200tdi csw -Zikali
2008 110 2.4 tdci csw-Zulu
2011 110 2.4 tdci csw-Masai

27th Aug 2022 6:24pm

spudfan

Member Since: 10 Sep 2007
Location: Co Donegal
Posts: 4708

If I was coming to this in the normal course of events I'd be diagnosing a faulty solenoid on the starter motor. There is a click when the key is turned and then nothing. As the starter motor was replaced a few months ago I cannot see this being the problem. The replacement was a Bosch. I've a mechanic coming in during the week and like everyone else with this issue I'll be trying the fixes suggested here.
Strange how it can be working perfectly one day and then the next day just give up the ghost. 1982 88" 2.25 diesel
1992 110 200tdi csw -Zikali
2008 110 2.4 tdci csw-Zulu
2011 110 2.4 tdci csw-Masai

28th Aug 2022 9:17am

Ianh

Member Since: 17 Sep 2018
Location: Essex
Posts: 2034

I would check all the connections to that starter motor, given it was replaced a couple of months ago as they may have worked loose and are not fully connecting.

Also what symptoms were exhibited to cause you to replace the starter motor ?

28th Aug 2022 9:48am

spudfan

Member Since: 10 Sep 2007
Location: Co Donegal
Posts: 4708

It disintegrated! 1982 88" 2.25 diesel
1992 110 200tdi csw -Zikali
2008 110 2.4 tdci csw-Zulu
2011 110 2.4 tdci csw-Masai

28th Aug 2022 11:17am

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17450

2007 Defender 110 Puma 2.4 DCPU Stornoway Grey

Also worth checking for a faulty starter relay (under the o/s/f seat on a 2.4), if this fails there will be no power to the starter.

28th Aug 2022 12:55pm

spudfan

Member Since: 10 Sep 2007
Location: Co Donegal
Posts: 4708

Everything electrical works including the courtesy light. I will try the battery negative terminal disconnect. If it does not kick I will know it is something else and hopefully easily tracked down.

1982 88" 2.25 diesel
1992 110 200tdi csw -Zikali
2008 110 2.4 tdci csw-Zulu
2011 110 2.4 tdci csw-Masai

28th Aug 2022 1:22pm

Martin
Site Admin

Member Since: 02 Apr 2007
Location: Hook Norton
Posts: 6611

2015 Defender 90 Puma 2.2 XS CSW Montalcino Red

Click image to enlarge

Check the 30A fuse (undocumented fuse for starter solenoid) in the pair on the middle right of this photo.

Bottom right is ECU fuse, not related to this problem.

1988 90 Td5 NAS soft top

2015 D90 XS SW

28th Aug 2022 1:56pm

spudfan

Member Since: 10 Sep 2007
Location: Co Donegal
Posts: 4708

I disconnected the negative terminal, left it off for a few minutes and then reconnected it. It still would not start. All I get is a "click" which makes me think it could be the solenoid or something else mundane! I will see what the mechanic thinks. 1982 88" 2.25 diesel
1992 110 200tdi csw -Zikali
2008 110 2.4 tdci csw-Zulu
2011 110 2.4 tdci csw-Masai

28th Aug 2022 1:57pm

spudfan

Member Since: 10 Sep 2007
Location: Co Donegal
Posts: 4708

Martin wrote:

Click image to enlarge

Check the 30A fuse (undocumented fuse for starter solenoid) in the pair on the middle right of this photo.

Bottom right is ECU fuse, not related to this problem.

Just checked this and it is fine, thanks. 1982 88" 2.25 diesel
1992 110 200tdi csw -Zikali
2008 110 2.4 tdci csw-Zulu
2011 110 2.4 tdci csw-Masai

28th Aug 2022 2:04pm

Ianh

Member Since: 17 Sep 2018
Location: Essex
Posts: 2034

spudfan wrote:
It disintegrated!

I think that’s a very reasonable reason to replace it

28th Aug 2022 4:40pm

spudfan

Member Since: 10 Sep 2007
Location: Co Donegal
Posts: 4708

https://www.defender2.net/forum/topic83510...rter+motor 1982 88" 2.25 diesel
1992 110 200tdi csw -Zikali
2008 110 2.4 tdci csw-Zulu
2011 110 2.4 tdci csw-Masai

28th Aug 2022 5:01pm

spudfan

Member Since: 10 Sep 2007
Location: Co Donegal
Posts: 4708

Back in action. The thing that sorted it (hopefully

) was jamming the negative battery lead terminal as far down as it would go on the negative battery terminal, then tightening it up. 60 starts later over two days with two different sets of keys and starting first time.
I had removed the negative battery lead and reconnected it as suggested but to no avail as I stated earlier. I had the mechanic check all the technical stuff but all was O.K. He suggested putting the negative battery clamp as far down as it would go on the battery terminal before tightening it up and this seemed to do the job. So anyone else having this bother don't just attach the clamp to the terminal, force it down then tighten it. Sounds innocuous enough but it seems to be working for me. Any lapses and I'll let you know, but for now all is good. 1982 88" 2.25 diesel
1992 110 200tdi csw -Zikali
2008 110 2.4 tdci csw-Zulu
2011 110 2.4 tdci csw-Masai

7th Sep 2022 1:08pm

AndreB

Member Since: 23 Jan 2021
Location: Brielle
Posts: 11

2010 Defender 90 Puma 2.4 HT Galway Green

Non starter

Hello quys,

I have exacltly the same issue, crank but not firing. By reading all the topics I am quite convinced the solution is the "shunt".

I have a very basic technical knowledge but I must give it a try to get the life back in my beloved Defender.

Obvisously a very "dumb"guestion

Ho can I get acces to the instrument pack connector? Is that one connected to the green immobilise module behind the speaker? Or do I need to access the instrument cluster?

Sorry for this..

Had:
Defender 90 TD5 2001 - 225.000 km
Defender 110 TD5 - 2000 - 120.000
Have:
Defender 90 Puma 2.4 2010 - 211.000 km
Instagram: https://www.instagram.com/landrover_diary/

10th Jul 2023 8:43am

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