d2 immobiliser fault

sierrafery said:

You dont have to try anything , if you connect a dedicated tester you can read it or change it and remember it...as long as you know what's stored in the BCU you'll have to use it only when necessary no need for testing only the latch must work well for it cos if the latch switch is making tricks the code is useless

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i did try the code 1515 and it went through the motions saying incorrect code ect so i know the latch and associated gubbins is working and talking to each other,
i was speaking to another friend with hawkeye pro gear today when its mot is sorted ill get it to him to have a read of it and see if theres anything troubling it and can get him to check eka at the same time

i think you are not very concentrated on this even thouh it's your interest.... you can forget about any tester as long as it's immobilised, i've already told you that https://www.landyzone.co.uk/land-rover/d2-immobiliser-fault.296434/#post-3687863

sierrafery said:

i think you are not very concentrated on this even thouh it's your interest.... you can forget about any tester as long as it's immobilised, i've already told you that https://www.landyzone.co.uk/land-rover/d2-immobiliser-fault.296434/#post-3687863

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it was more so to put eka to a memorable number than anything else, the car is running locking unlocking as it should other than a nsf door lock mechanism not lifting the latch -but it doesnt seem to be affecting the imobiliser and alarm side of things,probably a linkage or something

leg oot the bed said:

it was more so to put eka to a memorable number than anything else, the car is running locking unlocking as it should other than a nsf door lock mechanism not lifting the latch -but it doesnt seem to be affecting the imobiliser and alarm side of things,probably a linkage or something

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That'll probably be the "motor" which drives the unlocking of the mechanism rather than just the linkage. The locking motor is probably working alright.

The same thing has happened to my r/n/s door and sadly it requires a complete change of the mech. it's the only way. Got the part, just waiting for some warmer weather.

Thank you. Might be an old thread but 1515 managed to wake mine up after locking out. May the search be with you!!

ShaunPDisco said:

Thank you. Might be an old thread but 1515 managed to wake mine up after locking out. May the search be with you!!

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And how exactly did that happen if you dont mind?

Hello All,
I am having trouble wit the car due to immobilisation.

The problem started with a key problem. The does not unlocked the car and alarm start to went off. And the car immobilised. Even in the local licensed dealer/service can not solve the issue. I transfered the car to an old technician. What they told me is When they connected the car to the T4 diagnostic everything went normal and the car is starting and working very well. When they disconnect the car immobilising again and not starting.

He say we cannot program with T4 diagnostic because BCU is on the limit of reprogramming. İt cannot limit reprogramming again. So I have 3 main questions:

1. Does BCU has a limit of reprogramming/or reseting to remobilise the car? I assume T4 is the original LR service machine and should do anything. Also I do not think if BCU has a limit for that. if there is, how to reset it.
2. Is there any way to fix with T4 diagnostic tool?
3. In Turkey, NANOCOM is not sold and bringing is not very easy because of the Customs. Is there any other solutuons that can help?

Your advises are much appreciated.

Hi, let's clarify some things:

LR35 said:

What they told me is When they connected the car to the T4 diagnostic everything went normal and the car is starting and working very well. When they disconnect the car immobilising again and not starting.

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So did you see that yourself or is just what they said cos it seems impossible to me as while the vehicle is immobilised no diagnostic tool could communicate with the BCU or if by some oddity it would then the immobiliser can be disabled

LR35 said:

1. Does BCU has a limit of reprogramming/or reseting to remobilise the car?

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I've never heard about such thing nor stated in any official LR document and i i've seen them all, the BCU is fully programmable and i really doubt it has any limit once a dedicated diag tool is connected to it and that's what T4 is.

sierrafery said:

Hi, let's clarify some things:

So did you see that yourself or is just what they said cos it seems impossible to me as while the vehicle is immobilised no diagnostic tool could communicate with the BCU or if by some oddity it would then the immobiliser can be disabled

I've never heard about such thing nor stated in any official LR document and i i've seen them all, the BCU is fully programmable and i really doubt it has any limit once a dedicated diag tool is connected to it and that's what T4 is.

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Really appreciated for your prompt reply.

sierrafery said:

So did you see that yourself or is just what they said cos it seems impossible to me as while the vehicle is immobilised no diagnostic tool could communicate with the BCU or if by some oddity it would then the immobiliser can be disabled

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I did not see that by myself. They informed me that this BCU can not be programmed due to full memory. It already programmed many times in the past.

When this car was in the licensed dealer's service it was working normal when connected to T4 diagnostic tool. I called them again. Asked if they can able to enter EKA code. They say yes. we can able to enter EKA code.

sierrafery said:

I've never heard about such thing nor stated in any official LR document and i i've seen them all, the BCU is fully programmable and i really doubt it has any limit once a dedicated diag tool is connected to it and that's what T4 is.

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Thank you for this confirmation. I can not convince him on this. I am searching a document that showing BCU is fully programmable.


I hope my messages clarifying your questions.

LR35 said:

When this car was in the licensed dealer's service it was working normal when connected to T4 diagnostic tool. I called them again. Asked if they can able to enter EKA code. They say yes. we can able to enter EKA code.

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Then get the EKA code and you can remobilise it with that untill you fix the fob or ask them to disable the immobiliser

LR35 said:

I did not see that by myself. They informed me that this BCU can not be programmed due to full memory. It already programmed many times in the past.

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I asked you if you saw yourself how the engine started and ran with T4 connected not else cos now you say

LR35 said:

When this car was in the licensed dealer's service it was working normal when connected to T4 diagnostic tool.

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like you saw that... if you didnt see this then IMO is b0ll0x

sierrafery said:

I asked you if you saw yourself how the engine started and ran with T4 connected not else co now you say

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No I have not seen it. They told me that via phone.

sierrafery said:

Then get the EKA code and you can remobilise it with that untill you fix the fob or ask them to disable the immobiliser

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I bought a new brand new fob. They can not link it to the car. They tried fob to another vehicle to test if the fob working.

My battery went flat. New battery installed but remote not working. Car is new to me and I was not sure if the remote was working prior to the flat battery. When I turned on the ignition lights would come on but no response to trying to start. Friend has a diagnostic unit and it would not communicate with the BCU. Scratched head and started searching, didn’t have a an EKA code. Found this thread. Used the key in the door to enter the 1515 code. Car started!!!! Remote not working the central locking.

sierrafery said:

I've never heard about such thing nor stated in any official LR document and i i've seen them all, the BCU is fully programmable and i really doubt it has any limit once a dedicated diag tool is connected to it and that's what T4 is.

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On the Discovery Series II Workshop Manual - 1999MY ON - 6th Edition - Eng version.

It states that "The ECM uses a 'flash' electronic erasable programmable read only memory (EEPROM). This enables the ECM to be externally configured, to ensure that the ECM can be updated with any new information, this also allows the ECM to be configured with market specific data. TestBook must be used to configure replacement ECM's. The ECM canbe reconfigured up to 16 times to meet changing specifications and legislation."

Do you think BCU may have a similar reconfiguration limit?

The technician insisting that the BCU is not programmable any more and he cannot configure it.

LR35 said:

Do you think BCU may have a similar reconfiguration limit?

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No i dont... and IMHO that "16 times" for the ECM is also b0ll0x .... if it's programmable it can't have such limitations

LR35 said:

The technician insisting that the BCU is not programmable any more and he cannot configure it.

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if it's the same technician who said that the immobilised engine started and ran with T4 connected then it became immobilised again just like that i'd say that he is full of sh*t

sierrafery said:

No i dont... and IMHO that "16 times" for the ECM is also b0ll0x .... if it's programmable it can't have such limitations

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I am a bit rookie on this jargons. what is b0ll0x means
Thank you for feedbacks, really.

sierrafery said:

if it's the same technician who said that the immobilised engine started and ran with T4 connected then it became immobilised again just like that i'd say that he is full of sh*t

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Unfortunately yes.