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olliecracker

Member Since: 18 Nov 2017
Location: Gloucestershire
Posts: 19

2009 Defender 110 Puma 2.4 HT Keswick Green

2009 2.4 TDCI Defender Starting Issue (10AS? IPAC? ECU?)

Hi All!

My Defender has developed a fault where I can turn it over, it will try to start then die. There on after, no matter how long I crank the Engine over, it will fail to start.

The weird part is, I can go back the following day and all be well, it will start and run fine. It happened just under a year ago and I though had "fixed itself"

... I was wrong. The problem has persisted and now the majority of the time will fail to start.

My Defender up until recently lead me to believe that it didn't have an immobilizer. I have started it with a blank key cut from Tipsons for 8 months. With no key fob, No CDL, nothing. By taking the dash out, I've found the greed Lucas 10AS unit and realized it does have an immobilizer.

From looking at the wiring schematic, I can see the 10AS unit, goes through the IPAC (instrument cluster) and to the ECU. By disconnecting the 10AS unit and reconnecting it, sometimes it will start but the majority of the time it won't.

I've connected a LYNX diagnostic tool to the Landy and found that the Passive Immobiliser is Active and the THEFT system is active. Trying to disable them wit the LYNX tool has been rubbish. Follow all the instructions... says it will update the settings then it doesn't.

I was wondering, If I am having a problem with my 10as unit, would the Landy continue to turn over? - or if the 10as unit does stop the engine from cranking, should I look at the IPAC? - or even the ECU

Thanks for your help,

Ollie

18th Nov 2017 7:09pm

custom90

Member Since: 21 Jan 2010
Location: South West, England.
Posts: 20300

Check the IPAC electrical plug at the rear is secure which would be a good starting point, as well as all your main Earth straps.
Plus both battery post clamps.

⭐️⭐️God Bless the USA 🇬🇧🇺🇸 ⭐️⭐️

18th Nov 2017 7:27pm

olliecracker

Member Since: 18 Nov 2017
Location: Gloucestershire
Posts: 19

Also.... No fault Codes found with the LYNX Diagnostics

18th Nov 2017 7:27pm

olliecracker

Member Since: 18 Nov 2017
Location: Gloucestershire
Posts: 19

I'll check them again tomorrow!, Looking at the connector on the back of the IPAC, all looked well. Will try checking continuity though!

18th Nov 2017 7:29pm

olliecracker

Member Since: 18 Nov 2017
Location: Gloucestershire
Posts: 19

Hi Steve,

From checking all the earths I could find, The IPAC plug and testing continuity between them, I can't see any problems. I'm starting to look a the 10AS module but internally it looks fine, no damp whatsoever!

Do you know if the 10as would stop the Defender from cranking or if it just sends the immobilization signal to the ECU to stop it from starting? Because if it does stop the engine from cranking, then maybe I can disregard this as part of my problem!

Thanks,
Ollie

20th Nov 2017 4:11pm

dorsetsmith

Member Since: 30 Oct 2011
Location: South West
Posts: 4554

in your case ECM sends crank enable will LYNX diagnostic tool not give you live dater when try to start the engine

i.e. crank enable output

20th Nov 2017 7:31pm

olliecracker

Member Since: 18 Nov 2017
Location: Gloucestershire
Posts: 19

Hi,

I've just plugged it in and it says starter.mot.enab and then says OFF. Even when the engine is turning over, the LYNX Tool Still says that it is Off.

Very confused.

Does this mean that the 10as Immobiliser isn't working?

Thanks,
Ollie

(Also... Just been reading up about the Nanocom and put it on Credit card

20th Nov 2017 8:49pm

olliecracker

Member Since: 18 Nov 2017
Location: Gloucestershire
Posts: 19

Click image to enlarge
Here's a screenshot!

20th Nov 2017 8:55pm

dorsetsmith

Member Since: 30 Oct 2011
Location: South West
Posts: 4554

i no this bit of side step can see crank pos read out on start

http://www.defender2.net/forum/topic48321....ank+sensor

20th Nov 2017 9:14pm

olliecracker

Member Since: 18 Nov 2017
Location: Gloucestershire
Posts: 19

Click image to enlarge

Cam/crank sync okay?

This was when I was cranking the Landy over!

20th Nov 2017 9:25pm

custom90

Member Since: 21 Jan 2010
Location: South West, England.
Posts: 20300

Could the crank position sensor need replacing in its self.

I thought someone did have that issue on here at one time.

Also worth trying.. press unlock on the fob right before starting and see what difference there is if any.
Is the red alarm light off, and appears to be functioning as you'd expect?

It should not flash at all once unlocked and before you start. ⭐️⭐️God Bless the USA 🇬🇧🇺🇸 ⭐️⭐️

20th Nov 2017 9:27pm

olliecracker

Member Since: 18 Nov 2017
Location: Gloucestershire
Posts: 19

By the looks, The sensor is changing state

20th Nov 2017 9:28pm

dorsetsmith

Member Since: 30 Oct 2011
Location: South West
Posts: 4554

you should be read RPM

20th Nov 2017 9:32pm

olliecracker

Member Since: 18 Nov 2017
Location: Gloucestershire
Posts: 19

I don't have any Fob, nor have I ever had the immobilizer light up on my dash. Its constantly been off for the year and a half of owning the landy.

I can see the sensor changing state which makes me look away from that. but by the looks it is a cheapish part to replace

Lynx Diagnostics says the passive immobiliser is enabled.. even though I have never had a key fob

20th Nov 2017 9:32pm

olliecracker

Member Since: 18 Nov 2017
Location: Gloucestershire
Posts: 19

I'll look again!

20th Nov 2017 9:33pm

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