Mud-club

Vehicle & Technical => Discovery => Topic started by: bodgeitjo on February 27, 2010, 10:16:04

Title: central locking on 300 dosnt work
Post by: bodgeitjo on February 27, 2010, 10:16:04
hi people as above the central locking on the fob has stopped working. changed the battery in the fob and it works the immobiliser ok but not the doors have also checked the fuse thats ok. there it a very quiet click coming from the black box thingy behind the door card. the trouble ive got is it doesn't lock on the key so cant leave it.    thanx  jo
Title: Re: central locking on 300 dosnt work
Post by: sirloincloth on February 27, 2010, 17:21:49
Had the same problem on my Disco. Turned out to be a problem with the fob. It may be worth checking the following;

1. split the fob.
2. Check the push buttons in the plastic cover still line up with the electronic button switches on the circuit board (PCB). They can shift postion over time, and suddenly you find the central locking doesn't work.
3. It may be worth operating the push buttons on the PCB while the fob cover is split. If the central locking works you know its a fob problem.

Chris
Title: Re: central locking on 300 dosnt work
Post by: jay2578 on February 27, 2010, 20:08:49
the quiet click in the door could indicate a relay problem?
Title: Re: central locking on 300 dosnt work
Post by: JPJ on March 01, 2010, 22:16:55
What happens when you try the key in the lock? Does the central locking still not work - does the door open OK? The central locking module is connected to the drivers door lock by good old metal rods hooked onto a plastic/nylon loop.
Title: Re: central locking on 300 dosnt work
Post by: karlo on March 02, 2010, 09:07:26
Does it switch the immobiliser on and off that would indicate if the fob was working as they have a habit of becoming unsoldered where the battery carrier connects to the circuit board.
Title: Re: central locking on 300 dosnt work
Post by: bodgeitjo on March 04, 2010, 21:23:01
yes the immobiliser works on the fob so guessing thats ok. the door didnt work on the key so had to change the barrel but central locking still not workin. the fuse is ok but cant find in the haynes where the relay is to try that any ideas   cheers  jo.
Title: Re: central locking on 300 dosnt work
Post by: JPJ on March 04, 2010, 22:56:32
My Haynes shows no relay at all, just the drivers door module controlling everything protected by its own 15amp fuse in the fuse block. With the door card off you should be able to push the short rod on the right of the module in and out which will activate the module to lock and unlock all doors. I guess if this is dead then its the fuse or a new unit.
Title: Re: central locking on 300 dosnt work
Post by: SteveGoodz on March 05, 2010, 20:25:48
My Haynes shows no relay at all, just the drivers door module controlling everything protected by its own 15amp fuse in the fuse block. With the door card off you should be able to push the short rod on the right of the module in and out which will activate the module to lock and unlock all doors. I guess if this is dead then its the fuse or a new unit.

I'm with JPJ, there's nothing inside the door but the lock actuator - no relays/etc. If the actuator is duff then fear not as Maplins sell an equivalent for a few quid, as against a few tens of quid for the genuine LR one :-)
Title: Re: central locking on 300 dosnt work
Post by: mark-d on March 07, 2010, 11:21:17
Had the same problem on my Disco. Turned out to be a problem with the fob. It may be worth checking the following;

1. split the fob.
2. Check the push buttons in the plastic cover still line up with the electronic button switches on the circuit board (PCB). They can shift postion over time, and suddenly you find the central locking doesn't work.
3. It may be worth operating the push buttons on the PCB while the fob cover is split. If the central locking works you know its a fob problem.

Chris

i had the same thing with mine
Title: Re: central locking on 300 dosnt work
Post by: Northmead on March 20, 2010, 17:42:58
Hello

I have the same fault on my 300tdi , No door locking at all
but the indicators flash ok. checked fuse is ok, just can not
find what the problem is.....

Doors will not lock manuallly ..Drivers side Key..or on Brand New remote .
if you sort it please let me know !!

Regards
Brian
 :? :-k

Title: Re: central locking on 300 dosnt work
Post by: jay2578 on April 01, 2010, 18:39:51
This may sound silly, but i assume you have tried spraying wd into the door lock if the key dont work? I know the pins can gum up and stop the key working, it happened on the father-in-laws Disco2 ignition and he could`nt start it and every time he tried it set the alarm off!!............ just an idea :?
Title: Re: central locking on 300 dosnt work
Post by: Range Rover Blues on April 02, 2010, 20:48:59
Door locking is controlled by a central black box under the LH end of the dash, part of the alarm I think, at least that's how the 300series RRC works.  I think ours is faulty because the interior light is also controlled by this black box but ours isn't working.

getting a second hand one is not easy I've found.
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