BCM Question

[edals]

Hi All.

The BCM in the VR is having issues. The remote central locking no longer works.
I have already replaced Keys, performed resetting everything. I did get it to work for about 2 weeks then it failed again.

So, The BCM in the Berlina as i have, has a BCM 522. Am i able to throw in a BCM lower then that like a 498?? Whats the difference? Or should i stick to 522 as what it has.

Kinda need the central locking to work for the missis.

Cheers

[Brett_jjj]

You will have to see someone with a scantool that can access the BCM to read or clear any logged error codes,or to run through some tests to find out whats happening with it.You will have to use the same level BCM if its replaced.Usually they come in 3 different levels, low,med,high.It depends on the option level of the vehicle to which BCM was fitted.Usually calais and berlina had high BCM's,whereas executive usually has a low level BCM.

[hsv91ss]

I believe there was four levels as my VR Berlina had a 885 Lux BCM

[NeilB]

I always thought it was Low, Hi and Lux

[PRAVX II S]

If you get another BCM you will have to recode the key to suite the BCM so this means a new key. You will need to go Holden Dealer.(Reestablish the security link)

BCM low/mid/high/lux

[edals]

Ok, I rang holden this morning, gave them the part number, the Vin number, and they said it does not match the car. And they still cannot tell me if the VR Berlina came with a Low, Mid or High. So heres a photo of it. This is starting to drive me nuts. I was going to get another BCM with keys anyway as all the keys are stuffed anyway.

Sorry for being upside down lol

[edals]

Ok, I have Just confused my self Even more. That picture i just showed there, is the BCM in the passenger side above the ECU, and now i find the one in the above the drivers side fuses. So What controls What? I thought only the VN/VP had them on the passenger side. And the VR-VS had them under the dash.

[Chirpstr]

So it's a VR Berlina? What year? The one under steering wheel would be the bcm and other one under glove box would be the TDM (theft deterrent module).

[Chirpstr]

The TDM does the cruise and the immobilizer and the BCM does everything else AFAIK.
Central locking would have to work through the TDM first to get it disarmed then sends a signal to the BCM.
So the key would be coded to the TDM and you should still be able to start the car without the BCM.

[NeilB]

The one above the fuses will have the type written on it someplace, Low, Mid, Hi or Lux. This is the 1 the keys need to match.

[edals]

So it's a VR Berlina? What year? The one under steering wheel would be the bcm and other one under glove box would be the TDM (theft deterrent module).

Yeah Mate its a Vr Berlina S1 1993 Model.

It Starts absolutely fine and the alarm system is on. Tried turning it off but all it does it allow me to start the car with just the key with no head attached. Just trying to work out witch one i need to replace for the central locking to work again. Tried a new key, did not work, and after resetting everything it work a few times then failed again. And sometimes the boot will open with the key, so i am assuming the receiver still works.

[Chirpstr]

I gather you've checked fuse 7? 20amp.

[edals]

I gather you've checked fuse 7? 20amp.

Yes For Sure. I have checked and checked lol

[Chirpstr]

Ok, can you hear the BCM click when you press for the boot?

[edals]

Ok, can you hear the BCM click when you press for the boot?

No I cant mate, when ever the button works is about 1% of the time, and im always out of the car. I just press if when ever the key is in my hand to see if it will work lol. All the central locking works. But As you said the TDM is the first part to disarm the car and opens the doors. So i would say thats the best bet. Trying to find one is the hard part. Now that i am going after a TDM and not a BCM

[Chirpstr]

I would take the key head back and tell who ever did it to do it properly and your not happy.

[Chirpstr]

Also I didnt say the TDM opens the doors I said it reaches the signal from the keyhead to dissarm the system (red light stops flashing) then sends a signal to the BCM (under steering wheel) to unlock all doors... - (that's why you should be able to hear it click).
Does the red light stop flashing when you press the button on keyhead?
Does the central locking work when you do it via the drivers door lock?

[edals]

Also I didnt say the TDM opens the doors I said it reaches the signal from the keyhead to dissarm the system (red light stops flashing) then sends a signal to the BCM (under steering wheel) to unlock all doors... - (that's why you should be able to hear it click).
Does the red light stop flashing when you press the button on keyhead?
Does the central locking work when you do it via the drivers door lock?

No, When i press the button, The Red light does not stop flashing, And all door open when you unlock it manually, and the light is still flashing and the alarm does not sound, I know it should though. The Red light does stop when you turn the ignition on though. And i can here it click when the ignition is turned on. Its not the keys cause i have tried 2 new ones. And i did code them right cause i have got a new key for the VX and works fine.

[Chirpstr]

Have you got the key for the passenger door pillar? Does the cruise control work?

[edals]

Yep got the passenger door key. Its on at the moment. I have turned it off and on and still not difference.
And the cruise control works perfectly. Used daily.

[edals]

Update. Removed the BCM, not the TDM, still no idea what level it is. the pictures there are the only ones on them. This is screwing with my head. And chrip i heard the BCM click when i pressed the Boot release but Light was still flashing, but boot did not open. I give up lol

[edals]

Bump........

[Brett_jjj]

Mate, Holden should be able to tell you what the BCM level is from the part numbers on the BCM sticker.I have never seen one like that.They usually have LOW,MED,HI or LUX on them.All the ones Ive seen have it on the sticker,and looking at the pic of yours,theres nothing like that on there,so the part numbers would be the best bet.Try Bosch and Holden and quote both the Bosch and Holden part numbers.Holden can plug in a Tech 1 and tell you straight away what BCM is fitted.And test it to make sure its all working ok.

[moff_man]

from memory (my book has been distroyed in the rain) higher level vr's have a bcm and a tdm where as lower spec cars have just the bcm ither low or mid statesmans had a high bcm and a tdm

my best bet would be go to the wreckers and gat a bcm from a berlina and the key head and try that