UdderlyOffroad Posted March 26, 2018 Share Posted March 26, 2018 Afternoon all... I'm having an intermittent starting issue with my W plate Disco 2 TD5, and it's been getting worse recently. I'll try to start it, and it won't crank, all the lights illuminate on the dash, and it starts bonging at me. I also get that weird 'B' symbol on the LCD display, which apparently means the immobiliser has kicked in. Disconnecting the battery for a minute sorts it, but it is getting quiet annoying to have to do that. If it makes any difference, I'm unlocking it with the key, and locking it again with the switch on the dash via the passenger door. This is to prevent the alarm arming itself, as the remote part of the key is long since kaputt. Where should I start looking for the fault? Thanks all Matt Quote Link to comment Share on other sites More sharing options...
bear Posted March 26, 2018 Share Posted March 26, 2018 Hi, First thing is to make sure you have a GOOD charged battery -TD5s don't like weak ones. I've read elsewhere the the B symbol is usually a problem with one of the onboard computers. I think it's the BCU but you may wish to research further. HTH, Griff Quote Link to comment Share on other sites More sharing options...
sierrafery Posted March 26, 2018 Share Posted March 26, 2018 4 hours ago, UdderlyOffroad said: I also get that weird 'B' symbol on the LCD display, which apparently means the immobiliser has kicked in. That's bad news, it's not easy to be ruled out and it can be expensive but the best way is to replace the interior fusebox(IDM) first cos it's plug and play and used to suffer from water ingress(the only important thing is to disconnect the battery first then after replacement and battery reconnection put ignition on II and leave it so 5 minutes for digital data comms reestablishment with the BCU) ...then if the symptom persists the BCU must be replaced but this one needs complex programming with dedicated tester made by someone who knows what he's doing... in the worst case it's the data link between the IDM and BCU but this is rare and can be a nightmare to find the faultat least you have this info for free cos i've learned this the hard way 9 years ago when it happened to me and paid around 300 quid only for trailers from one ''specialist'' to another untill i took the problem in my own hands and found the PCB cracked within the BCU after two weeks of troubleshooting based only on diagrams and poor info found on the web at that time Good luck 1 1 Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.