Central locking

[CHASTER]

My recently aquired 52 plate Terrano seems to have a very sensitive/temperemental/or faulty?? central locking system
It has a mind of its own and sometimes locks all doors randomly a few minutes (or quite a while) after setting off. :naughty I can readily unlock everything again with the switch on the dash or the switch on the driver's door but I never can say with certainty that it will not re-lock as I'm tootling along However; this can be particularly tricky if it self-locks when stationary with keys in car,(and it did today) and no adult in there to unlock. Luckily it was on the drive at home, nobody trapped inside so there was no panick and "a very nice man" came to get me out of trouble.

I also discovered that my spare key is slightly damaged/worn and was no use for manual unlocking. Must get a new one ASAP. The keys are the type with integral buttons and there is no label to show MHZ so perhaps they are just one standard frequency.
Anyone had similar experiences of this sort of fiasco ?:nenau

Incidentally, the alarm horn never sounds during all these malfunctions so perhaps it is a long standing situation and someone has "killed" the horn until some other silly devil (me) sorts it out.

 

[lacroupade]

I used to have this same problem a few years back with 5-Series Beemer. It was finally diagnosed to damp/water getting into a connector somewhere.....heaven knows what connectors there are on the T2 that might be the culprit though - maybe someone who has done a strip-down in the right area might help, especially if theres one close to a known leakage point thats getting doused?

 

[rossco]

Have a look at where the cables go into the door from the pillar and see if they have chaffed causing a short.

My thinking it's more likely inside / around the door as this is probably the only place the wiring could get damp.

 

[zippy656]

Why is it that tools only slip or drop down out of reach when you are in the most awkward position, or at the most critical stage?


theres when you need the kids to help out. or do the job for you! little hands are great for that.

 

[avillaschi]

Just an idea but it could be nothing to do with the remote central locking "per se" but the interior "lock all doors" button shorting or contacting accidentally. You might want to get that checked out.

 

[CHASTER]

Thanks for all the helpful pointers everyone. I now know what sort of thinks can affect the system and will start ferriting when the rain eases off.

 

[wildbri]

my nearside rear door locking is also misbehaving, it wont unlock. I have taken off the side cover (only broke two clips!). I have found that every thing is connected but although the solenoid bangs when the lock button is pressed the arm doesn't not operate
so i guess that some thing is broken in the white box.... anyone know how to remove it? I have taken out the bolt but the box wont move, in fact it looks as though the whole door locking mechanism is in one piece. thanks bri

 

[elty001]

my nearside rear door locking is also misbehaving, it wont unlock. I have taken off the side cover (only broke two clips!). I have found that every thing is connected but although the solenoid bangs when the lock button is pressed the arm doesn't not operate
so i guess that some thing is broken in the white box.... anyone know how to remove it? I have taken out the bolt but the box wont move, in fact it looks as though the whole door locking mechanism is in one piece. thanks bri

to remove this part you have to undo the three bolts that hold the lock/catch mechanism to the door.once this is loose you have to disconnect the rods then you can remove the unit.the white box is held on to the lock/catch with a couple of screws.
might even have one kicking about in the shed if you need a replacement.

 

[wildbri]

thank you, I will take it out tomorrow, if I can open the box I can see whats broken...
I will let you know if I need to replace it. regards..bri

 

[wildbri]

dry but cold to-day, so I took out the near side rear door locking assembly, dismantled it and just as I was removing the cover of the white box it slipped out of my hand and fell on the garage floor!! Fortunately in another life I was a service engineer for office equipment, and used to small bits, springs, gears and other small nylon cams arms and levers. after a small curse I cleaned lubricated and assembled the box and tested it before putting together the whole lock assembly. I hot glued the two panel pins that had fallen off when I leverd it off.
Now everything works, what was the fault? don't know, but the clean, lubricate and assembly
worked.... regards...bri

 

[CHASTER]

Update on central locking problems.
Being a lazy ----- I decided to try the easiest way first. Squirted WD40 into any orrifice anywhere near a lock or door catch.:augie (Lots of little spaces to insert the little plastic tube). Followed this up with an equally liberal blasting with Silicon aerosol.
RESULT; much to my surprise and delight everything works like it aught to.:thumbs
After initial visions of ££££s worth of bits being needed it is a big relief to get away with it so easily. Has been OK for a week now so it looks like it's done the trick. Fingers crossed

 

[zippy656]

keep spraying it then too

 

[CHASTER]

Zippy ; what is "it" ?---on second thoughts please don't answer that.

Forgot to mention; apart from the soaking as described, I stuck a couple of self adhesive pads at each door microswitch striker "flat" just to make sure they were all being activated. The back door seems to have a large gap, but it doesn't leak or rattle.

 

[lacroupade]

Well Chaster, remember WD40 isn't actually a lubricant per se; one of its major properties is repelling water, which is why it used to be so good for spraying damp distributors in days of old....also works a treat if you've got a squealing drive belt ( a quick squirt on the relevant pulley, preferably with the engine off cos the fan just blows it all over the place!).

So as Zippedydoodah says, spray it from time to time and it ought to keep damp at bay, which was probably the cause of your short given the outcome...

 

[zippy656]

Well Chaster, remember WD40 isn't actually a lubricant per se; one of its major properties is repelling water, which is why it used to be so good for spraying damp distributors in days of old....also works a treat if you've got a squealing drive belt ( a quick squirt on the relevant pulley, preferably with the engine off cos the fan just blows it all over the place!).

So as Zippedydoodah says, spray it from time to time and it ought to keep damp at bay, which was probably the cause of your short given the outcome...

hay you.. its zippy, not Zippedydoodah :lol:lol:lol

 

[lacroupade]

it somehow seemed wildy appropriate, now I can't stop humming the blasted song...

 

[zippy656]

hay you.. its zippy, not Zippedydoodah :lol:lol:lol

nice song..

wonder if we can have sounds as a sig or avatar??

 

[Thomas-the-Terrano2]

sorry if coming in late, but our previous car a daewoo nubira would stay locked whilst
car in use, ie motoring. guy we bought it from said was correct as safety feature but
we, especially mrs wanted locked when in car as a childminder. second opinion of
daewoo dealer confirmed we were right and mod to elecy fault resolved.