2 stage unlock - malfunctions and won't let me into my car :cry:

[ozzie_online88]

About once every couple of days, when I unlock my car only the drivers door unlocks and the rest stay deadlocked :| so I can't even pull em up with my hands.

I have tried turning 2 stage unlock, on, then off again in the options menu but still happens.

Such a pain to test as I never know when it is going to happen, but so far I have noticed that if I press the unlock button again the rest unlock.

I usually deadlock my doors (press lock twice) when leaving the car, so I am now just single locking to see if it faults...

I have an 03 VY Exec S1. With cop function turned on for the digital spedo.

My poor car..help me


..Rhys

[ozzie_online88]

Ok so it just happened again! I pressed unlock and only the drivers side comes up. I locked then unlocked this several times in a row and still only the drivers door would come up.

Left it half an hour n now its back to normal

[Farlig]

maybe try a BCM reset, sometimes they do funny things.

[ozzie_online88]

Not so funny when it happens lol.

How do I do a BCM reset? Will it lose the police mode function that was turned on via the service techs at holdens?

Cheers Farlig

[SSbeast]

Umm unsure what your saying but are u hitting the unlock button twice? if you only hit it once when dead locked it only brings up the drivers. Then u hit unlock again and it should unlock the rest.

[ozzie_online88]

Well I have 2 stage unlock turned off - so this should not happen at all.

But when it does glitch, even if I press unlock twice, sometimes it opens up the rest, sometimes it doesn't, very weird

[Full Spectrum]

Has this happen since the police mode?..

Maybe it's a Cop thing?.

[ozzie_online88]

No, had cop mode enabled about 2 months ago, and this problem has come up within the last couple of weeks.

Is very weird that it only happens to me on average once a day. N sometimes if I press the unlock key again it will unlock the rest of the doors, other times it doesn't and no one can open or unlock another door.

[Mick28]

Mate, I have the same problem with my car (vy 2003 executive wagon) , when it started happening you could sometimes get it unlock by using the other remote, now it just about never unlocks any of the passenger doors, and it gives you hell if you dead lock it, try getting kids in the car and not been able to open the doors.

Holden tell me they will start by replacing the BCM witch will cost me $500+

But holden dealer cant say that replacing the BCM will fix the problem, so it may cost me $500 just to find out that the BCM was working fine

[ozzie_online88]

Hey Mick,

Unfortunately my car still does this..i just decided to put up with it!

It happens once or twice a month, but usually when i press the unlock button again it unlocks the rest of the doors.

Since I can never get it to happen when I show someone, no one knows how to fix it short of throwing money at it and hoping it goes away.

Please if anyone comes up with a solution, I would be most grateful to know!

[sp001in]

bcm's for vy's can be found on ebay for around $30.00 I just picked up a midlevel one for my exec ute for an elec window install for $20.50 last week.

[Benjamin K]

Not so funny when it happens lol.

How do I do a BCM reset? Will it lose the police mode function that was turned on via the service techs at holdens?

Cheers Farlig

Disconnect your battery for a few hours...

Will reboot the BCM next time you start it, leave the doors unlocked when you try this though.

The computers in cars are just like PCs, most strange errors can be fixed by restarting it.

If not, I'd go for the BCM is rooted.

[ozzie_online88]

Thanks Benjamin! I'm trying this on my car today, and will let you all know how it goes

[whitey66]

Disconnect your battery for a few hours...

Will reboot the BCM next time you start it, leave the doors unlocked when you try this though.

The computers in cars are just like PCs, most strange errors can be fixed by restarting it.

If not, I'd go for the BCM is rooted.

What a crock of you know what,who told you that??
Computers in Commodores are nothing like PCs,they may share similar components but their operation is completely different.

The BCM can be reset easily by removing the BCM fuse under the bonnet,about 10 seconds will do,not a couple of hours lol.

What happens when you use the key in the door to unlock it?

[TMM]

Has this happen since the police mode?..

Maybe it's a Cop thing?.

I have police mode enabled and single stage unlock has always worked fine

[Benjamin K]

What a crock of you know what,who told you that??
Computers in Commodores are nothing like PCs,they may share similar components but their operation is completely different.

The BCM can be reset easily by removing the BCM fuse under the bonnet,about 10 seconds will do,not a couple of hours lol.

What happens when you use the key in the door to unlock it?

Guess you never don't quite realise how long a computer can hold it's charge for....

Anyway, not quite sure about the timing but I'm fairly sure 10 seconds is no where near long enough.

As for the architecture of a BCM, let's jsut say they share more in common with a computer software wise then you may realise, just something to think about In no way are they simple circuits running no software like you are making them out to be.

[one_and_only2004]

10 seconds won't do squat. i reset mine months ago after i put all of my bits in the motor. doing it for 30 seconds didn't do anything, yet a few hours did. made the car run like it had a cam in it or something...

[ozzie_online88]

So i did the reset by disconnecting the battery for 3 hours, so far it has happened about 3 times in the past week since the reset! So much more frequent.

But if i press the unlock button again, it unlocks the other 3 doors fine (note that i am unlocking it from deadlock, i always press the lock button twice to dead lock the car)

I also tried pressing the unlock button once and only the drivers side door came unlocked, so i put my key in and turned to unlock the rest but nothing happened. if i turned my key the other way it locked the doors, then turned it again to unlock the doors and they all unlock.

Also tried enabling 2 stage unlock for a drive or 2, then disabled it again. But the problem is still there.

Very weird one indeed.

[whitey66]

Guess you never don't quite realise how long a computer can hold it's charge for....

Anyway, not quite sure about the timing but I'm fairly sure 10 seconds is no where near long enough.

As for the architecture of a BCM, let's jsut say they share more in common with a computer software wise then you may realise, just something to think about In no way are they simple circuits running no software like you are making them out to be.

Yeah,I wouldn't have a clue about how long it takes,seeing as i've been a Holden Tech for over 16 years,and come first in the Technicians Guild twice for NSW with 2 seconds and a third in other years.Not to mention making Master level every year except for one.I know exactly how a BCM and a PC work.

As for the software they share with a PC ,BCM's do not reboot for starters.
I have reset probably well over 100 BCMs for various different problems so I think I know what i'm talking about.
I never said anything about them running no software,you just made that up,if I did,please quote me.

[whitey66]

10 seconds won't do squat. i reset mine months ago after i put all of my bits in the motor. doing it for 30 seconds didn't do anything, yet a few hours did. made the car run like it had a cam in it or something...

Can you tell me how resetting the BCM magically gave your car more power (or did you mean it was just idling rough?) when it has no engine management control,besides security?

[whitey66]

So i did the reset by disconnecting the battery for 3 hours, so far it has happened about 3 times in the past week since the reset! So much more frequent.

But if i press the unlock button again, it unlocks the other 3 doors fine (note that i am unlocking it from deadlock, i always press the lock button twice to dead lock the car)

I also tried pressing the unlock button once and only the drivers side door came unlocked, so i put my key in and turned to unlock the rest but nothing happened. if i turned my key the other way it locked the doors, then turned it again to unlock the doors and they all unlock.

Also tried enabling 2 stage unlock for a drive or 2, then disabled it again. But the problem is still there.

Very weird one indeed.

Sounds like a faulty BCM or drivers door wiring harness.
Opening and closing the door repeatedly can break the wires in the harness over time.
Quite often when this happens the insulating plastic surrounding the wire stays intact with broken wires inside.This can cause an intermittent circuit fault and is fairly common.
If you un-tape the harness where it bends when the door opens and closes, and bend each wire singularly,you can tell if the wires are broken by a sharp kink in the wire.The broken wires insulation will show a sharp angle (rather than a rounded shape if it's OK) where the break is if you know what I mean.

Another easier thing you can try is disconnecting the interior light switch on the drivers door,locking the door latch as it is when the door is closed fully (flick it shut with a screw driver,it will click twice).
The BCM will think the drivers door is now closed ,even though it's actually open,make sure all the other doors are closed as well.
You can then wriggle the harness when trying out the locking to see if you can make it play up.
Just remember the door lock actuators have a time-out built into the BCM if operated too many times repeatedly.Just wait a couple of minutes then try them again if this happens.
Don't forget to unlatch the door when you're finished or you could break the latch when trying to close the door if the latch is already locked.

Hope this all makes sense to you,good luck.

[ozzie_online88]

So it happened again today made no difference if i used the key or the button it only would do the drivers side door, n the rest stayed deadlocked. I tried many times but it stayed like this, even after opening the drivers side door and playing with the harness. After taking it for a drive and stopping down the street 10mins later i was able to lock, then unlock all the doors.

Another interesting thing is if i sit with the car unlocked, and for 30seconds i manually press down the drivers side lock button, leave it for a second, lift it up, and repeat. After 30seconds of this it stops locking all the doors at the same time. Even if i press the lock button on my key none of the doors lock. The same thing happens if I do it with the passenger side lock. After another 30 seconds of doing nothing it goes back to normal tho. Could this be related? Or is this a normal safety function or something?

Would be nice if someone has a few mins to test this

[Mick28]

Ozzie mate,
sounds a whole lot like mine, and it happened a lot more the longer you leave it, I took mine past an auto elect the other day and got them to plug the scanpro in to it,.. Witch was give me an error from the driver’s door lock, yet he couldn’t see any problem to say it was the bcm and has told me to pull the door trim off an cheek the outputs from the driver’s door lock.

dose yours make a different sound when you push the button the second time if it doesn’t unlock, with mine if it does unlock all the doors all you here is one (click) of a relay, if it doesn’t unlock on the second press you hear kind of a (click-clock-click) sound yet all passenger doors are still locked

also do you have an aftermarket alarm installed?

[ozzie_online88]

Hey Mick,

No i do not have an aftermarket alarm installed. In regards to a relay sound, i will let you know soon as it happens again. Does the noise come from down near the fuses? The drivers side door? Or all doors?

This problem = ghay

lol