central locking

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diynorm

New Member
Posts
8
Hello just got my first range rover a 1996 4.6hse
Seen a few posts about the central locking but this is my problem. Remote key fobs only unlock rear doors and turn alarm off. Front doors and tailgate do not unlock via fob. Drivers door barrel and key will unlock drivers door and tailgate. But passenger door only unlocks via lifting button up inside.
I seen you can get a modified rf unit in the boot.
Will this mean I need also new actuators for front doors and tailgate aswell. Seems strange that a signal from fob will unlock rear doors. You would think the unit would pack up all together. Really need tailgate to work via fob as will be used the most. Any ideas thank you
 
diynorm said:
Hello just got my first range rover a 1996 4.6hse
Seen a few posts about the central locking but this is my problem. Remote key fobs only unlock rear doors and turn alarm off. Front doors and tailgate do not unlock via fob. Drivers door barrel and key will unlock drivers door and tailgate. But passenger door only unlocks via lifting button up inside.
I seen you can get a modified rf unit in the boot.
Will this mean I need also new actuators for front doors and tailgate aswell. Seems strange that a signal from fob will unlock rear doors. You would think the unit would pack up all together. Really need tailgate to work via fob as will be used the most. Any ideas thank you
Click to expand...

Nothing to do with RF unit. About communication between locks. Check the white plugs behind trim panel drivers and passenger side at base of A post. Maybe bad contact due to corrosion causing broken circuit to door outstations.
 
hi , I see you've posted in the right section now so where are you based ???? they might be someone local to you will help you for a few beers ,,,cheers mozz
 
Datatek said:
Quite possibly the lock motors have burnt out due to a duff RF receiver. Tailgate lock is operated via the drivers door lock.
Click to expand...

+1

All locks should operate if you manually move either the driver lock or passenger lock (unless someone has been playing with diagnostics). If not and your RF receiver isn't the new one with a green dot then the lock motors have probably burnt out.

Don't buy new locks. MGF ones for the same year don't fit but the lock motors in the actuator just clip in and out and the motors are the same.
 
OK thanks for every ones help.
I still cannot understand that if the tail gate unlock using the key in the drivers door then that motor must be ok. so what actually controls the tailgate. e.g why does it not unlock with the fob ??
I need to check to see what rf reciver unit it has,
It had a new battery a while back by previous owner and i had to reprogramme windows and sunroof etc.
would connecting the new battery have any effect on the locks ?
 
The tailgate is OK but it won't unlock until the driver's door does. So when you unlock with the fob and the driver's door stays locked, so does the tailgate. When you manually unlock the driver's door with the key then the tailgate unlocks too.
 
diynorm said:
OK thanks for every ones help.
It had a new battery a while back by previous owner and i had to reprogramme windows and sunroof etc.
would connecting the new battery have any effect on the locks ?
Click to expand...

Possibly battery life shortened by RF issues.

No, shouldn't affect locks but RF will burn them out fast. I lost a LOT before I changed my received. RF receiver is small box under the rear parcel shelf on the driver's side.

There's a cheaper fix that involves using a second fob to disconnect the original receiver and reconnect when blipped. Might be in the How To section. Cannot remember who posted it at the moment.
 
Here you go for the cheep fixhttp://www.landyzone.co.uk/lz/f10/rf-reciever-work-round-258096.html
worth it to rule out car wakeing up from other signals.
one day i will get the link shorter.
 
ok thanks again all very helpfull

If i went down the new rf receiver route ( very expensive ) where is the best place to buy the latest verison ?
 
Try island 4x4http://www.island-4x4.co.uk/radio-receiver-ywy500170-p-3612.html
£200 +vat, the extra remote mod under £10 and put money saved to other repaires:)
 
If you have any sense look at the wiring from BECM to the outstations first. R/H front door outstation activates boot lock and driver door lock. L/H outstation activates passenger door lock. Rear doors are seperate circuits. What is happening has nothing to do with RF receiver. Think about that another day if you get other problems.
 
Last edited:
Re any sense.yes I do hence joining this and getting some good advice before just pulling things apart. Don't fix things unless they are broken as they say. (unless you get bored lol). I have 23 years in motor trade so have done most repairs etc, the only reason I was saying about a new rf unit is other people's threads about replacing actuators etc only for them to be burned out via the older rf units keeping them awake. But thanks once again all very helpful comments
 
diynorm said:
Re any sense.yes I do hence joining this and getting some good advice before just pulling things apart. Don't fix things unless they are broken as they say. (unless you get bored lol). I have 23 years in motor trade so have done most repairs etc, the only reason I was saying about a new rf unit is other people's threads about replacing actuators etc only for them to be burned out via the older rf units keeping them awake. But thanks once again all very helpful comments
Click to expand...

The only thing the older RF units can keep awake is the BECM. Locks will not activate unless a genuine code is recieved, the BECM decides what is a genuine code not the RF unit.
 
I´ve exactly the same symptoms, one day all is well, next morning no front doors open with the remote.
If i pull the trigger on the passenger door, yours driver, will open the rear ones, the drivers, yours passenger, will not.
Opening with the key will unlock all doors but passengers and boot...
 
wammers said:
The only thing the older RF units can keep awake is the BECM. Locks will not activate unless a genuine code is recieved, the BECM decides what is a genuine code not the RF unit.
Click to expand...

I'm not sure that is right, Wammers. I don't know enough about how these things work to say for sure but what I do know is that I went through 3 lots of locks until I replaced the RF receiver (mine was the blue dot which is the original one). It could be coincidental, of course. I don't believe so though. In my case the interference was coming from a wireless weather station outstation. Second hand locks now fetch a premium - £80 on the bay. MGF locks better at £20. Could still get expensive though.

I absolutely agree with you on check the connectors and microswitches first. Cheap and easy things first and then spend when you have to. As Brian says, there's bound to be another expense along soon!

I'd be tempted to try Brian's fix too. In fact, there's an old 4.0 I'll be planning to do that to shortly!
 
Grrrrrr said:
I'm not sure that is right, Wammers. I don't know enough about how these things work to say for sure but what I do know is that I went through 3 lots of locks until I replaced the RF receiver (mine was the blue dot which is the original one). It could be coincidental, of course. I don't believe so though. In my case the interference was coming from a wireless weather station outstation. Second hand locks now fetch a premium - £80 on the bay. MGF locks better at £20. Could still get expensive though.

I absolutely agree with you on check the connectors and microswitches first. Cheap and easy things first and then spend when you have to. As Brian says, there's bound to be another expense along soon!

I'd be tempted to try Brian's fix too. In fact, there's an old 4.0 I'll be planning to do that to shortly!
Click to expand...

The RF receiver is just that, a receiver, as far as i am aware. Waking up the BECM it can and does do to check if the signal it recieved is the correct code. Until it gets the correct code the BECM will not operate the locks. Maybe the RF reciever loses it's discrimination and spurious signals can mimic the correct code i don't know. Maybe Keith can expand on that, i don't really know enough about electronics and radio.
 
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