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[minilandrover]

 :-[hello everyone, my 94 2.5tdi omega diesel has decided it does not want me to drive it anymore. The keyfob refused to let me in, and after getting in by key, refused to un immobilize the car. I did the usual reset , ign on and keyfob next to receiver and tried resetting but nothing, The key fob works ( tested the ir signal output ok) and replaced the ir receiver with a spare unit. I have the four wires to the receiver 1, 12v  2, signal out to cpu 3.6v  3, earth/ ground,  4 12v when ign on.
I have also dis and re connected the cpu and the same with the battery. Has my cpu failed?   I have a spare cpu from another 2.5 omega i dismantled, if i change cpu's will it reprogram to my key? by doind the ign on and key fob next to he receiver trick?  or will i have to rebuild my old key robbed for battery contacts and switch,? and try again..
at the moment my car is at the local post office so i might have to get it towed home....colin

[Marks DTM Calib]

The system on these is quite simple and from an immobiliser perspective can be worked around, pm me if you need details of what needs to be done. 

[minilandrover]

hi yes i would be interested in anything that will get me running again. i tried the old keyfob from a dismantled omega same model i swapped main cpu under bonnet, the central locking box behind the glove box and the ir receiver and still no luck both fobs work code sent visible on my mobile phone cam . we have checked all the fuses too . i am thinking it's a wiring/ connector fault somewhere  colin

[minilandrover]

Hi yes i would appreciate some help, i have tried two main cpu's together with their matching keyfob and decoder box ( behind the glovebox). all to no avail, the car is still fully immobilized so that was two complete systems and that included changing the ir receiver with the spare one as well.
Each time we turn on the ign to position one as position 2 is to crank the engine in my book, then we put the fob right up to the ir receiver and press and keep pressed so it gives the lock / unlock code then followed by the close the windows signal ( rapid flashing) still no reactin from the car. we have tried a data cable to a laptop OBD2 and it fails to be able to connect and read the cpu ( the cable and software work with a renault but fails on the omega b ) also tried two different softwares.
...NEWS FLASH while writing this my son removed fuse 20 and started the car!!! we then stopped the engine replaced the fuse and the car was dead again, removed the fuse again but this time had to remove and replace 6 times to TRICK a relay that can be heard inside the dash and she started again, This is with the original cpu and box behind the clove box to im going to rebuild the fob using the original circuit board and try locking and unlocking the car. How can fuse 20's removal be responsible ?? and why not every time.  Is there a relay inside the dash giving us all this grief?? Colin

[minilandrover]

LATEST     it gets worse...I have rebuilt the original keyfob  ( the battery connections died one the other fob so i had to change bits over) ok original fob working Ir transmitted, back to the original cpu and ir decoder in the car, If we remove fuse 20 the car starts  but now we have no dashboard ign lights..no fuel speedo or rev counter etc  but the engine starts..
and still the fob refuses to work with fuse 20 back in and still no dashboard instruments or ign light