Dommo Posted February 25, 2018 Share Posted February 25, 2018 I've been trying to diagnose this issue for a few weeks now with no success. Of course, by "trying to diagnose" I mean ordering some parts in the new year and not finding the motivation to try again until today. Symptoms: Car does not unlock by remote from either fob. Car unlocks through key fine and EKA works ok. Car is a 2001 Discovery, V8 if that makes a difference. When the issue first started, I used the EKA code and attempted to reprogram the keys through the Nanocom. This reported as "successful" though didn't work. I then ordered a new receiver unit as internet searching suggested it was next in line. I didn't get around to fitting this until today. I removed the old unit which didn't look too weathered but did show signs of corrosion from a previous sunroof leak. I cleaned the bolts from any surface rust and fitted the new unit. I refitted the battery, and no joy. I disarmed the immobiliser through the EKA again and tried recoding the keys again. Still no response from the keys. I checked the codes stored in the BCU through the Nanocom and these matched the keys. I performed an RF test and this was positive from both keys, and negative when no keys were pressed. Thus, I think I've ruled out the coding, and ruled out the receiver. What's next down the line? All the internet searching I do returns threads where issues are fixed when replacing the receiver so I can't find one where someone has had to investigate further. In my mind, if the BCU is getting the right codes from the keys, it should be behaving itself. I don't know what else is involved... Cheers, Dom Quote Link to comment Share on other sites More sharing options...
Ally V8 Posted February 25, 2018 Share Posted February 25, 2018 Nanocom also has a key Synch function, try that, I have seen them before where the BCU recognises the key on the RF test,but won't operate the locks.A re-synch has sorted it. Quote Link to comment Share on other sites More sharing options...
Dommo Posted February 25, 2018 Author Share Posted February 25, 2018 Is that the one where you synch it where it reads the signal from the key rather than entering the code? If so, that's the one I was using. I'm wondering if the alarm/immobiliser bit has been working all along and it's just the locks that aren't functioning. Given that the BCM is reporting it's getting signals from the keys ok... and the alarm lives 'inside' the BCM. Perhaps it's the connection to the IDM or the IDM itself that is at fault. Of course I'm just banding about what I've understood since my original post - I don't have a detailed understanding of the IDM to know what it receives and what it does! Quote Link to comment Share on other sites More sharing options...
sierrafery Posted February 26, 2018 Share Posted February 26, 2018 Some thing are unclear, 1. what's the red LED on the dash doing when you use the fobs? ... no reaction at all? 2. when you say the vehicle unlocks with the key do you mean the central locking works too, or does it work from the dash switch? 3. when you open the door the alarm goes off? Quote Link to comment Share on other sites More sharing options...
Dommo Posted March 1, 2018 Author Share Posted March 1, 2018 Hi, Just been out again for another play with it: 1. LED status is unchanged. Does not come on with lock button (on fob). Does not go off with unlock button. 2. Key and switch based central locking functions appear ok. Unlock drivers door on first turn, unlock the rest on subsequent turn 3. I assume so, but have enabled disarm with key so unable to test. As the LED status doesn't change, I assume the alarm is still active when using the remote. Of course, this means it's unlikely to be outside of the BCU, as those 'key' functions go through the BCU and take the same path as the remote from then on. Quote Link to comment Share on other sites More sharing options...
sierrafery Posted March 1, 2018 Share Posted March 1, 2018 did you run RF test with nanocom? and if yes what's the result? Quote Link to comment Share on other sites More sharing options...
Dommo Posted March 1, 2018 Author Share Posted March 1, 2018 Yes, which is the annoying part as that reports signal received from both keys, and no signal received when no buttons are pressed so seems to be working ok... which of course doesn't correlate with the remote not working. Quote Link to comment Share on other sites More sharing options...
sierrafery Posted March 1, 2018 Share Posted March 1, 2018 you have to go through this too: Quote Link to comment Share on other sites More sharing options...
Dommo Posted March 1, 2018 Author Share Posted March 1, 2018 I've got an older Nanocom, not the evolution but recognise the steps. I've done 2 and 3, not touched 1 as the code already matched the key, but for ruling it in/out I'll re-enter it, ta. Quote Link to comment Share on other sites More sharing options...
sierrafery Posted March 1, 2018 Share Posted March 1, 2018 If the programming is ruled out unlock/lock the door with the key but dont open the door and try the fob then Quote Link to comment Share on other sites More sharing options...
Dommo Posted March 1, 2018 Author Share Posted March 1, 2018 Well well well... I set the codes, unchanged but went through the modify route to 'update' them. Synced the key, and this time the RF test told me what key signals and been received, not "a signal has been received". So "key 1" or "key 2". All closed down and remotes working fine. I owe you a virtual beer (and a real one to be fair), thank you very much! Quote Link to comment Share on other sites More sharing options...
sierrafery Posted March 1, 2018 Share Posted March 1, 2018 Well done, i'm glad it's sorted Quote Link to comment Share on other sites More sharing options...
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