360 FOB antitheft lock/unlock help needed

Nothing wrong with the fob. The linkage underneath the armrest probably need adjustments or worst case the door lock mechanism needs replacing.

 

If its not the lock mechanism alignment which would make it pretty consistently not working then it may be a dreaded immobilizer failure, yes another one.

It could indeed be the door lock/unlock immobilizer relay starting to fail, it's such a common thing these days as these cars get older.

I've seen this before so many times now and helped several fellow owners from side stepping huge bills to resolve this issue. Sometimes it will work and sometimes not and sometimes it will flap between states all on its own.

 

Normal is one beep for lock, two beeps for unlock. Like Steve said, your links are likely out of adjustment. Take her to someone who knows what they are doing and it can be easily fixed.

 

Getting a beep/no beep might be a different issue, which has to do with the siren module. The internal battery is probably on its way out. It's a common problem with the 360. Doing a search on the forum will get you a lot of hits on the subject.

 

What Steve & Taz said. Plus, Steve's elaboration can cause irregular immobilizer behavior. Not that Trev is wrong but I don't start at the most serious failure since it isn't the most common.

 

I did say first check other things especially door lock alignment and what have you. The alarm siren is a case of not *IF* it will fail but *WHEN* it will fail and the same thing on the immobilizer... They are a ticking time bomb ready to fail on you at the worst possible moment. Sorry but I have had to fix a tidal wave of immobilizer failures recently (they are at that age now that so many are failing to the point of no return). I am now highly suspect of that piece of sh** now and its one of the first things I look at.

Actually majority of the time it has actually failed (or some relays are already draining battery current but not yet spiking voltage enough to destroy other ecu's or erase their eeprom ) but many owners haven't even appreciated the symptoms since they keep their 360's tethered to a tender inside a garage and since its in a garage they don't even lock it...

 

All good points Trev. No slight was intended, you know FAR more than I do about these cars. The cause of problems probably shifts over time as some stuff is fixed and other things age making them the majority issue. And I agree that most probably don't pay enough attention to see issues early or mask them because of being hooked to a tender. These cars are very sensitive to power levels and issues.

 

I'm betting that the OP is facing two issues at the same time. The siren module is about to go south (hence erratic chirps/no chirps) and the doors are not locking/unlocking in sync with the chirping (rod linkage out of adjustment or a weak door lock solenoid). I've been there, done that.

 

Yes. I'm thinking its several issues too combining together to make it harder to see whats going on without systematic testing. The door lock relay which switches over the current to power the door locks also plays its part in this too and cannot be ruled out without testing it, so technically it might even be 3 issues. The door locks themselves are horrible cheap parts originally from some sort of Lancia / Fiat. Never did find out the exact model but the innards are basically little motors often found in some old scalextric toy cars. Yes really! I'll see if I can dig out the very old photo's I have of when I did a tear down on a broken one.

 

That has happened to me at 18K, and it turned out to be the door lock mechanism. The lock assembly cost about $400. Replaced it and readjusted the rod linkage. All is good. The three beeps is to warn you that an unsuccessful locking/unlocking has occurred.

 

That's interesting because it sure operate and sound quite loud like a solenoid. My beater Volvo has door mechanisms that definitely uses a motor. You can hear the whirring noise when it operates. Please post pictures if you can.

 

When my alarm module started to die it did similar things w multiple beeping.