2010 MGTF alarm not always deactivating

[Johnny]

Hi, have had a problem recently with the alarm. It sets ok on the fob on locking. Sometimes, when going to unlock the car the doors unlock and the alarm sounds. I then have to lock and unlock it again to get it to deactivate. It does this most times but not every time. Also on occasion when I turn the key in the ignition to start the car I get nothing and have to press the lock and then the unlock on the remote after which it starts fine. It is a low mileage chinese era car. Any ideas? Thanks. John.

[talkingcars]

How fresh are the batteries in the remote?

[Johnny]

Thanks. I can see from the service history that one of the fobs had its battery replaced in January 2013. The problem ocuurs with both fobs that I have.

[Mykel]

Do the Chinese ones also have that pesky Pektron BCU/alarm unit (YWC001541) fitted? These are famous for relay faults and breaking soldering points. I’d think this could be a job for Paul (Technozen), he’s in Brighton, so maybe not too far from you when you’re in the South East?

[Johnny]

Could be but it seems strange if both fobs are affected? Car has only done 18,000 miles so they wont have had much use.

[talkingcars]

The fob batteries are a service item and should be changed annually, regardless of use, to avoid problems.

[talkingcars]

Do the Chinese ones also have that pesky Pektron BCU/alarm unit (YWC001541) fitted? These are famous for relay faults and breaking soldering points. I’d think this could be a job for Paul (Technozen), he’s in Brighton, so maybe not too far from you when you’re in the South East?

http://www.technozen-electronics.co.uk