Car won't lock with the key fob

LeRich · 23rd September 2013, 21:36

The issue's been there as long as I've had the car but want to sort it before the winter.

Basically I can't lock the car using the fob. Instead I have to lock the car using the master switch inside then lock the drivers door with the key outside. Using the key in the door will not lock the whole car, only the drivers door. The lock mech. itself has been replaced twice with known working locks and the problem persists.

In addition: to open the car I can either press 'unlock' on the key or via drivers door key hole to unlock as normal. I haven't been able to activate the alarm as I don't think it arms (nor does the deadlocking). None of the doors/bonnet/boot appear open on the message display when they're shut so the car knows they are close. I have two keys and the function is the same for both. I have tried re-syncing the fobs, but to no avail.

I've exhausted the (rather useless) forum search function which has proven fruitless. My thinking is either a faulty control unit or a break in the wiring somewhere but if anyone has any ideas, they would be appreciated.

Thanks in advance, Richard

LeRich · 26th September 2013, 18:59

Any ideas?

suzublu · 26th September 2013, 19:00

T4

:d:d:

Godfer · 26th September 2013, 19:04

Fuses! Try 36!!!!!!!

COLVERT · 26th September 2013, 19:19

The locking signal from the ECU must be missing.

The way you lock the car at the moment is with the overide system. ( ie. does not involve the ECU. )

Somebody who understands the electrical system might be able to tell you which wire from the ECU you need to check. ( Might be a break in the wire or maybe just a poor spade connection. )

Colvert.

LeRich · 26th September 2013, 19:34

Cheers guys. Fuses are all good. I was thinking a T4 sesh may be on the agenda.

trebor · 26th September 2013, 19:40

If you have no joy beforehand, we have a nano meet on 20 October and you can get a T4 session there, plus some expert technical advice from owners who do not use this forum, only 30 minutes or so down the motorway from you and you will be welcome

LeRich · 28th September 2013, 07:16

Quote:

Originally Posted by trebor

If you have no joy beforehand, we have a nano meet on 20 October and you can get a T4 session there, plus some expert technical advice from owners who do not use this forum, only 30 minutes or so down the motorway from you and you will be welcome

Thanks for the offer Trebor - I may well take you up on that as my parents live in Shrewsbury so can combine the two.

3pinplug · 28th September 2013, 07:46

Hi
My old Rover 800 used to occasionally do this, to reconnect the fob buttons i used to sit in the car and push drivers button down to lock all doors, then i kept pressing the unlock button on the fob whilst waving fob in air and eventually doors will unlock themselves via the button then your reconnected via the fob. Not tryed it on a Rover 75 as i mention but dont see why it shouldn't work. Give it a go and let me know if it works.

Mark

COLVERT · 28th September 2013, 15:05

Quote:

Originally Posted by 3pinplug

Hi
My old Rover 800 used to occasionally do this, to reconnect the fob buttons i used to sit in the car and push drivers button down to lock all doors, then i kept pressing the unlock button on the fob whilst waving fob in air and eventually doors will unlock themselves via the button then your reconnected via the fob. Not tryed it on a Rover 75 as i mention but dont see why it shouldn't work. Give it a go and let me know if it works.

Mark

That is how to recalibrate the key to the car. However his key will unlock the car so it is calibrated or they would not talk to one another at all.

23rd September 2013, 21:36	#1
LeRich Posted a thing or two Rover 75 Cont SE 1.8T Join Date: Aug 2010 Location: Cheshire Posts: 1,082 Thanks: 215 Thanked 232 Times in 178 Posts	Car won't lock with the key fob The issue's been there as long as I've had the car but want to sort it before the winter. Basically I can't lock the car using the fob. Instead I have to lock the car using the master switch inside then lock the drivers door with the key outside. Using the key in the door will not lock the whole car, only the drivers door. The lock mech. itself has been replaced twice with known working locks and the problem persists. In addition: to open the car I can either press 'unlock' on the key or via drivers door key hole to unlock as normal. I haven't been able to activate the alarm as I don't think it arms (nor does the deadlocking). None of the doors/bonnet/boot appear open on the message display when they're shut so the car knows they are close. I have two keys and the function is the same for both. I have tried re-syncing the fobs, but to no avail. I've exhausted the (rather useless) forum search function which has proven fruitless. My thinking is either a faulty control unit or a break in the wiring somewhere but if anyone has any ideas, they would be appreciated. Thanks in advance, Richard

26th September 2013, 19:04	#4
Godfer Posted a thing or two Seafrost 75 Join Date: Apr 2012 Location: Liverpool Posts: 1,821 Thanks: 232 Thanked 142 Times in 113 Posts	Fuses! Try 36!!!!!!! __________________ Godfer (Sid) A lovely Seafrost 1.8T

26th September 2013, 19:40	#7
trebor This is my second home Rover 75 CDTi Connoisseur SE & MG ZT Saloon 190 Join Date: Jun 2007 Location: Coven Posts: 12,533 Thanks: 526 Thanked 1,877 Times in 885 Posts	If you have no joy beforehand, we have a nano meet on 20 October and you can get a T4 session there, plus some expert technical advice from owners who do not use this forum, only 30 minutes or so down the motorway from you and you will be welcome __________________ www.midlandsnanomeets.co.uk Robs Car Gallery Coven near Wolverhampton WV9 2000 Cowley Built Rover 75 2.0 V6 Club SE/ Atlantic Blue/ Sandstone/Walnut (daily driver) 2003 Land Rover Freelander 1 TD4 HSE Helsinki Blue/Black Leather (swmbo daily driver)

26th September 2013, 18:59	#2
LeRich Posted a thing or two Rover 75 Cont SE 1.8T Join Date: Aug 2010 Location: Cheshire Posts: 1,082 Thanks: 215 Thanked 232 Times in 178 Posts	Any ideas?

26th September 2013, 19:00	#3
suzublu This is my second home rover 75 1.8 vvc club se wedgwood blue Join Date: Aug 2009 Location: Seaton Carew Posts: 26,986 Thanks: 65 Thanked 7,142 Times in 4,642 Posts	T4 :d:d:

26th September 2013, 19:19	#5
COLVERT This is my second home R75 Saloon. Join Date: Feb 2009 Location: France/or Devon. Posts: 14,003 Thanks: 3,851 Thanked 2,167 Times in 1,816 Posts	The locking signal from the ECU must be missing. The way you lock the car at the moment is with the overide system. ( ie. does not involve the ECU. ) Somebody who understands the electrical system might be able to tell you which wire from the ECU you need to check. ( Might be a break in the wire or maybe just a poor spade connection. ) Colvert.

26th September 2013, 19:34	#6
LeRich Posted a thing or two Rover 75 Cont SE 1.8T Join Date: Aug 2010 Location: Cheshire Posts: 1,082 Thanks: 215 Thanked 232 Times in 178 Posts	Cheers guys. Fuses are all good. I was thinking a T4 sesh may be on the agenda.

28th September 2013, 07:46	#9
3pinplug Loves to post Rover 75 SE Join Date: Sep 2013 Location: Medway Towns Posts: 311 Thanks: 0 Thanked 11 Times in 7 Posts	Hi My old Rover 800 used to occasionally do this, to reconnect the fob buttons i used to sit in the car and push drivers button down to lock all doors, then i kept pressing the unlock button on the fob whilst waving fob in air and eventually doors will unlock themselves via the button then your reconnected via the fob. Not tryed it on a Rover 75 as i mention but dont see why it shouldn't work. Give it a go and let me know if it works. Mark