P38 Central Locking Intermittent

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Stickybunngmail.com

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12
Location
Warwickshire
Hi all I have checked through various posts but can’t find anything.
My central locking works fine when it works but is very temperamental. It’s as if something goes to sleep then will not work until I sometimes do the resync procedure or it feels like it. Key fob lights up and works fine. Any ideas really appreciated guys.
 
Stickybunngmail.com said:
Hi all I have checked through various posts but can’t find anything.
My central locking works fine when it works but is very temperamental. It’s as if something goes to sleep then will not work until I sometimes do the resync procedure or it feels like it. Key fob lights up and works fine. Any ideas really appreciated guys.
Click to expand...
Search door lock micro switch test sheet, it was posted by @brianp38dse not so long ago,also check the white block connectors behind the plastic trim at the base of the A posts,both sides, look for corrosion,the best solution is to cut the connectors out solder and heat shrink the wires. At least you've had 11 trouble free years looking at the date you joined.;):D
 
tomcat59alan said:
Search door lock micro switch test sheet, it was posted by @brianp38dse not so long ago,also check the white block connectors behind the plastic trim at the base of the A posts,both sides, look for corrosion,the best solution is to cut the connectors out solder and heat shrink the wires. At least you've had 11 trouble free years looking at the date you joined.;):D
Click to expand...
Hi, thanks for the reply will have a check. No only had this one a few months and always normally find the answer on here
 
If you have to re-sync to get it to operate, check the car battery voltage after the car has stood for a while. Also check for wet carpet & underlay in the drivers footwell.
 
Datatek said:
If you have to re-sync to get it to operate, check the car battery voltage after the car has stood for a while. Also check for wet carpet & underlay in the drivers footwell.
Click to expand...
Hi, sometimes it works after a re-sync but seems to have a mind of it own for when it wants to work and for how long. I will check the battery and the carpet. What connectors could be affected in the drivers footwell?
 
Stickybunngmail.com said:
Hi, sometimes it works after a re-sync but seems to have a mind of it own for when it wants to work and for how long. I will check the battery and the carpet. What connectors could be affected in the drivers footwell?
Click to expand...
Any of the connectors to the BECM and the BECM itself may be affected by corrosion if the carpet is wet.
The actual FOB receiver has also been know to fail, hard to check without diagnostics or an oscilloscope.
 
Datatek said:
Any of the connectors to the BECM and the BECM itself may be affected by corrosion if the carpet is wet.
The actual FOB receiver has also been know to fail, hard to check without diagnostics or an oscilloscope.
Click to expand...
Ok thanks. The part I don’t understand is why it is so hot and miss. I have been out to the car today and the fob will not work at all even after a re-sync
 
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