Discovery II Immobiliser Reset:

First time user of this forum, looking for some help

I have a Series II Discovery V8, left it on the drive for acouple of weeks and on return the central locking using the remote key fobwould not work.

Assumed it is a dead battery so removed the battery and rechargedit, but no Joy. All it does is when the key is in switch position II all the displaylights are lit and a alternating tone sounder bleeps for about 20 seconds (the sametone as when the hill decent button is pushed in) but the starter does not turn.

Have tried to use the EKA code to manually reset the immobilizer but the instruction says I am suppose to unlock using the key andhold the key in the unlock position for about 5s or until the alarm sounds asingle beep. Well when I do this the alarm does not sound even if I hold it fora minute. Needles to say if I go through the process of keying in the EKA codenothing happens.

Ironically, had the green flag out and whilst I was lookingfor the BL**DY code he had started the car but a day later the same thinghappened. All the man from green flag would tell me was that it started byitself.

Any advice is gratefully received

Have you tried a replacement battery in the key? Or, open the door with the key, then press the unlock button on the key, this sometimes resets the system - always works on mine after frosty weather when the button on the key fails to work.

Thanks for posting your thought Mantamad. Yes I have unlocked the door using the key and I have also used the spare key that has a new battery to unlock but no joy. Just this nagging tone which last about 20 seconds and nothing else.

Apparently, if you put the key and turn into switch position 2, the BCU and the ECU suppose to recognise each other but no joy in this case.

Alongside the trip meter on the LCD there is flashing symbol like the figure 8 with a diagonal cross on it. does anyone know what this may be. It has appeared ever since the problem.

Hi there,

Just wondering if you ever got to the bottom of your immobiliser mystery, mine has started doing exactly the same thing and the mechanic thinks its a broken wire (expensive!) so any help I can give him would be a bonus saving to my wallet!

thanks,

Grant

If the audible noise you hear is 6 bongs and your central locking doesn't work from the inside switch plus your indicators aren't working, its probably water in your grey fuse panel under your steering wheel, have a look at : Land Rover V8 Discovery Faults
It has some photos of the water damage and what to look for.

Hi All,
I have exactly the same problem as Disco 98 has described.
DISCO 98
1."Alongside the trip meter on the LCD there is flashing symbol like the figure 8 with a diagonal cross on it. does anyone know what this may be. It has appeared ever since the problem."
2. " Assumed it is a dead battery so removed the battery and recharged it, but no Joy. All it does is when the key is in switch position II all the display lights are lit and a alternating tone sounder bleeps for about 20 seconds (the same tone as when the hill decent button is pushed in) but the starter does not turn."

I have had auto electricians look at the vehicle and they say that it must be something to do with the immobiliser, yet they cannot advise
as to what is causing it?
The original post by Disco 98 was back in 2007 and no one had a solution. I am hopeful that someone can assist?

Hi Fin,

The flashing symbol iirc correctly from what I have seen on here seems to be an issue with the BCU.

there have been a few threads about it on here, may be worth while doing a quick search.

here is one I have just done for you, LOL.

https://www.landyzone.co.uk/land-ro...-not-going-anywhere-fast.232301/#post-2674145

Cheers and good luck.

The crossed "B" or "8" is often said to indicate "a failure in communication between the BCU and the IDM".
The BCU is to be found behind the passenger's glove box and it communicates in a digital format with the IDM which is located on the back of the fuse board under the steering column. It is not a separate device but is integral to the fuse board.
Many cases of the crossed "B" have been found to caused by the ingress of moisture.

Thanks for the advice guys. It's been a few months now and as the New Year gets underway I am hoping to get up and running once again.
I removed the BCU and checked most of the wiring and connections where possible. I have been told by a local
expert that one cannot replace a disco 2 V8's BCU or repair it and that the best I can do is sell the vehicle for parts or find another
disco 2 and use my parts as a rebuild.(Huge Mountain To Climb For Me)
So my question is: Can anyone confirm that they have replaced a disco 2 V8'S BCU successfully and that the vehicle is working 100%?
I was told that the vehicle will never function safely or correctly again as Land Rover only makes a unique BCU for each vehicle??
2nd Question: My brother lives in the UK, and I was hoping to send the BCU over as a company named " Turner Diagnostics" in the UK states that they can repair
the BCU for around 180 quid and it will work. Can anyone confirm that they have a repaired BCU working again?
I have copied in the companies info as advertised:
"As the BCU has to be programmed to the vehicle and keys need to be programmed, failure of the BCU often result in the vehicle not starting, normally the vehicle will need to be recovered to the local Land Rover Dealership.
As you can imagine the cost of recovery, a new BCU, labour and programming can all add up and we often hear of invoices in the £500.00-£600.00 region.
Well now there is a much more economical solution when the BCU has failed due to electronics faults within the BCU.
Simply remove the BCU and send to us with details of the problems that your vehicle was exhibiting and include your email address and your full postal address and we will send an exchange BCU to you already programmed, exactly the same as your original.
So you just plug it into your car and away you go, no programming, no trips to the dealer, a simple solution at last to a very common problem..
Our Exchange BCU's are a simple plug-and-play solution to the common failure on Discover 2 models, both petrol and diesel models are affected by this common problem, the cost of an Exchange BCU is only £188.90 including carriage and is ready to go once you receive your BCU from us."

Thanks for taking the time to read this, I am hoping to get up and running again soon.
Fin

Fin1968 said:

I was told that the vehicle will never function safely or correctly again as Land Rover only makes a unique BCU for each vehicle??

Click to expand...

who told you that is a complete schmuck...that's a huge boll*X, only a nanocom or other dedicated tester is needed and you can replace the BCU with any BCU from any D2 regardless of engine type cos the BCU is 100% programmable...i did myself few of them without probs also they are repairable in most cases as well.... go for it without fear but be aware that for the crossed B the interior fusebox(IDM) can be faulty as well but that's plug and play

Must say that the BCU looks 100% when I opened it. Completely dry and no sign of damage. How will I know if the IDM is faulty?
When we did diagnostics it only showed "immobiliser failure", nothing else.

You can rule out the IDM only by replaceing the fusebox...the fact that there are no signs of damage in the BCU is not a certain prove that the processor has not failed though

Fin1968 said:

I have been told by a local
expert

Click to expand...

expert !?!? sorry, but

Fin1968 said:

the best I can do is sell the vehicle for parts

Click to expand...

Make you an offer did he ??? ..... ( call me cynical all you like )

sierrafery said:

who told you that is a complete schmuck...that's a huge boll*X, only a nanocom or other dedicated tester is needed and you can replace the BCU with any BCU from any D2 regardless of engine type cos the BCU is 100% programmable...i did myself few of them without probs also they are repairable in most cases as well.... go for it without fear but be aware that for the crossed B the interior fusebox(IDM) can be faulty as well but that's plug and play

Click to expand...

+1 - And i might suggest you use a nanocom to read any DTC's first......