406 Key Problem

[CB]

I have a '98 406 TD, my key seems to have become unreliable as far as operating the central locking is concerned. It will only lock/unlock remotely 50% of the time. I have changed the batteries and cleaned the contacts (as best I can) to no avail. My wifes key works fine. Is it a 'known' problem for the keys to become unreliable as far as central locking operation goes? I'm betting that a new key will cost an arm and a leg.

 

[Yuting Wan]

Have you tried spraying a very small amount of contact cleaning fluid into the tiny push button switch underneath the cover? sometimes it works.
Y.W.

 

[Harry Hotspur]

Button wears out sometimes,that is does not make true contact with the pcb.Before you order a new one open it up then give it squirt of switch cleaner [NOT WD40] a tv engineer has some.then ask him to check contacts and fine clean then with brass brush. It will be cheaper than a new one,expect to pay at least 80 quid at dealer, some places do them cheaper but not authorised. Sometimes the battery terminals become corroded which is pennies to fix.A dab of conductive paint as used in repairing remote controls works sometimes. Anyway give it a go with a TV Tech first then go from there. Frank [TeleTronic Services UK]

"Hung like Einstein,Clever as a Donkey!"

 

[CB]

Hi All

Just to update I had a duff smd Transistor on my key's PCB. Once replaced with a generic device it worked 100%

WBR:Carl

Button wears out sometimes,that is does not make true contact with the

pcb.Before you order a new one open it up then give it squirt of switch cleaner [NOT WD40]

a tv engineer has some.then ask him to check contacts and fine clean then with brass brush. It will be cheaper than a new one,expect to pay at least 80 quid at

dealer, some places do them cheaper but not authorised.

Sometimes the battery terminals become corroded which is pennies to fix.A

dab of conductive paint as used in repairing remote controls works sometimes.

Anyway give it a go with a TV Tech first then go from there. Frank [TeleTronic Services UK]

"Hung like Einstein,Clever as a Donkey!"

 

[Neil Harrington]

Hi
I have a simliar problem on both my two keys, do you know what SMD transistor was replaced ... the keys are around £70 plus £40 to reprigram allarm unit to matc new keys !!! each so I will repair if I possibly can..

Thanks

Hi All

Just to update I had a duff smd Transistor on my key's PCB. Once replaced with a generic device it worked 100%

WBR:Carl

Button wears out sometimes,that is does not make true contact with the

pcb.Before you order a new one open it up then give it squirt of switch cleaner [NOT WD40]

a tv engineer has some.then ask him to check contacts and fine clean

then
with brass brush.

It will be cheaper than a new one,expect to pay at least 80 quid at

dealer, some places do them cheaper but not authorised.

Sometimes the battery terminals become corroded which is pennies to

fix.A
dab of conductive paint as used in repairing remote controls works sometimes.

Anyway give it a go with a TV Tech first then go from there. Frank [TeleTronic Services UK]

"Hung like Einstein,Clever as a Donkey!"