Just an update, its been all good since.... I did see that B logo come up again just the other day and came o realize that the battery was flat, enough to have lights and radio but does not even try to crank. Now what i did last time was unplug the battery which is not what you should do cause it then Super Locks the Car, I used a Hawkeye to unlock it. Hope this helps
 
Just be patient, IMHO that crossed B is not a sign of weak battery but it could be the cause of it, when that symbol is present the engine might not crank even with good battery due to the datalink failure between the BCU and IDM not other issue... let's hope i'm wrong but better be prepared with a replacement BCU and IDM within reach cos it might not start at all at a point

a.m.o.f. unplugging the battery is not supposed to superlock anything as long as the car is unlocked...eventually immobilise it
 
HAHA, Hmmm not sure im happy just waiting for it to come to be fair!

Id say you have a lot more experience in this field than me, Just that the other day it came up when I had issues with the battery and after I had jump started it went away again. So figured that there was be a link between the two...
But the good news is that Paul (Details Above) has all the Kit to fix it and is able to program everything as well, so when I do replace it it wont cost an arm and a leg.
 
What can i say...fingers crossed, though i've never seen crossed B caused by low voltage, let's hope it's the first time ;)
 
I think it happened to me once.
My little boy was playing with the electric frontseats (car was turned off). After a while I wanted to start and it wouldn't, signs of low voltage.
What do you do in such case (or any case concerning a Disco fault)? Wait a little, pray and try again. Car started but got the crossed B.
Drove home in limp mode (15min. drive). Shut her off, started again and all was well. Never had the B since...
 
offroadmad said:
sorry to jump on this thread but as immobilisers seem a common fault is there any way of removing ???
Click to expand...
if there was, no-one on here would tell you......

"Ere guv, I wanns steal a few landies - will yu tell me how to disable the alarms?"
 
Same thing is going on with my one(1999 disco 2) if i were to buy a new bcu would it need coding in or can i just whack any one in there, cheers
 
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