Replaced BCM for VR 1993
Hi,
I bought a secondhand BCM to replace an old one which I am suspecting is not working. I cannot start the engine. How do you reset it or reset the immobilizer?
You need the keys from the car that the new BCM came from.
Hi,Originally Posted by commvr93
I found the answer. For those who are viewing or interested to know how, here it is
" After replacing to the new BCM, turn the car key to the on position until you see all warning lights on the instrument cluster. Make sure that all accessories are off so that you do not flatten the car battery. Leave the key in the full on position for at least 40 minutes. During this time the red security light will keep on flashing. Also during this time do not turn the key backward because this will cut off the synchronising sequence. When the time elapses or you are not sure if the time has elapsed, have a look at the red security light. By now it would have stopped blinking. This means that the car is ready to start. Do not go backward with the key and go straight to ignition mode. The engine will start, keep it going for few minutes or go around the block to test drive the car. Switch off the car completely, take the keys out and restart again in order to recheck it. "
I think you will find that that is just to bypass the immobiliser in an emergency like if your keyfob gets broken or goes flat.The key has to be left in the on position for 45 minutes for VR and up to series 1 VS,and 120 minutes on series 2 VS and onwards.These keys can not be reset by leaving the key on ,unless you buy a new one from mr Minit,and then you still need a working key which they use to just half program the key and then using it in the ignition finishes it off.Id be contacting holden,maybe they can reprogram the BCM to suit the key or re program the key to suit the BCM.
Hi,
Two hours passed . I tried to restart the car. It did not start. There was no ignition. My apologies for this misinformation. We are back to square one.
Any Ideas how to reset the new BCM?
on holiday
holden or new key programmed to suit or the key from the car it came out of put the key head on your old key
I tune the oldschool way fear on the passengers face and knuckle colour cant go wrong
tabbacco is still my favorite vegetable
Hi,
You are right. I tried to start the engine after two hours. It did not start. Originally I rechecked it by taking the key out and restarting it straight away. What I should have done is to wait a minute or two and then insert the ignition key and restart it.
I read earlier somewhere in this forum that you can reset the New BCM by taking the 15 amp fuse F/Fuel pump in the cluster of fuses next to the battery. But I cannot remember the sequence of steps how to do it. I remember that you allow 30 seconds at least before you reinsert the fuse. Is there a thread or a post that handles this issue in detail? I appreciate your help.
Do you know where to get the information from the BCM to get the key to be reprogrammed?
Gave up on VL's
If the keyhead is off the original BCM, it will never start......
You need the the original keyhead with the code for the BCM you installed....
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You need the original key that came with the replacement BCM. if that's not possible then its going to be really hard to do, Are you still able to access the car the replacement BCM unit came from??
on holiday
if you have the vin of the car the new bcm came from should be easy
I tune the oldschool way fear on the passengers face and knuckle colour cant go wrong
tabbacco is still my favorite vegetable
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that's what i was gonna say,, if ya can get the vin form the original car an tell Holden your situation they should be able to give you the bcm code then go to someone like mister minit an buy a new head for your key an they will program it for you with the code Holden gave you, all up cost you 100$
You can temporarily access the car by going through the 40 minute process aforementioned. The car will start. But when you pull out the key and come back after 1 minute to restart, it will not work. I think the ECU reverts back to the original security setting and won't allow you to mobilise the engine.
Last edited by commvr93; 03-02-2010 at 08:37 AM. Reason: wrong wording
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as said before it is just for an emergency situation it does nothing to program the key or reprogram the key
Lesson, Don't buy a BCM without Keyhead/s.
Now I'm nor sure but if you go to Mr Mint and have a keyhead programmed I think they just put a basic programme in and then you go through a process that will allow the key and the BCM to sync. Not sure on this!
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Mister Minit require a working head for the car/bcm in order to get a working key. If you only have the bcm an no other key then you need to go to holden with the vin number for the car an they will give you the details, doesn cost much if anything at all,,
Holden dealers up here don charge me at all because we have an agreement with them. After you get the details then take them to mister minit with your key, an they will program a new head to the details that Holden gave you. Iv said before it will cost you around the 100$ mark to get done an really is you only option (cheapest option).
I work at Mister Minit in Mackay so if you need to check up on anything just pm me or message here.
Jezza
hope this helps
firstly make sure you have plenty of fuel you need to time overide and start the car as discussed earlier but make sure the key screws facing the floor(this is important and also make sure the screws can turn i suggest cracking them but leave in), key on till lights on dash leave like this for at least 40 minutes sometimes takes an hour. when the security light stops flashing you can start the car now u need to drive to a holden dealer take into service area but leave running and make sure no one turns it off otherwise you will have to time overide again to start. you need a new key head from holden and i suggest two new screws because they rust up next get a technician that knows how to use tech 1. while car is running undo and remove key head fit new key head and screws. Plug in tech 1 use vr cartridge select bcm,program,additional key(make sure select this one not new key or it will want security number) press program ...done! it will ask if you want another key if you want more buy more key heads,screws and cut more blades off yours. you can program more off your working key.
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Iv tried to give you the cheaper option but hey in the end its up to you,. if you want to go to holden an do it that way thats all good,, have fun,
Jezza
Both ways wont cost you much last time i checked key program was $55, hsv $65 customer supplies key. Spare parts had a machine probably same as mr minute ,it is what i used to make a new key for mine i took my old key to them they scanned it and programed new key only you cant press the buttons or it loses its program until you have started the car with it (u need a working key). it was pretty good it took half an hour to get home but still worked okay. That machine can display the code in the key or program from a bcm security code from supplying the vin from the car the bcm is out of. There is no reset for a bcm it has a code inbuilt you do not ever program this and thats it if you replace the bcm with a new one all you do is program new keys to it.
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Holden use a Key Launcher witch plugs directly into the car an gets the code direct from the bcm or they run the vin number an get it off the data base, then burn the code onto the new key an before the buttons work you gotta start the car/ introduce the key, pressing the buttons doesn't make the key lose the code.
Where as mister minit uses a RW4 coding machine witch requires a working key to copy the code from an then same process go out to the car an start it/introduce the key, once the key has successfully worked in the car an started it then it burns the code permanently so it cant be erased an activates the buttons witch allows them to work. At work we can cut, code an introduce a commodore key in 5 to 10 minutes.
Real cars are steel cars.
A scan tool can also be used so the BCM will identify a new key.
If I told you I was a compulsive liar, would you believe me?
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key launcher scan tool same thing
Real cars are steel cars.
If a key launcher can extract/erase fault codes and show sensor voltages/ graphs etc. then yes.
Never heard the term key launcher before.
If I told you I was a compulsive liar, would you believe me?
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A key launcher has the main functions for doing keys but they recently enabled them to read other codes such as fault codes an im sure they can read some of the sensors as well, not to sure tho, our machine at work is still getting updated should have it back soon, an will check it out to see what new stuff it can do
Speed signal and odometer not working
Hi All,
I have got good news. I have been scratching my head over the weekend. I went through all the threads I started and through all your replies. I also started a process of elimination and went through the sequence of events that lead to the speedometer and the odometer not working. I ended up that the problem would be between the BCM and the cluster instrument. My checking of the replaced BCM eliminated that there is something wrong in the original one. So I started testing the connections at the back of the cluster instrument and found the problem. The printed copper lines on the green coloured plastic sheet are so delicate. Any wrong movement can cut or split them easily. So I started checking all the connections on No. 2 connector going to the speedometer and there it was. I could not see it with the naked eye. I looked with a magnifier and found a very tiny split in the line going to No.11 on the No. 2 connector. Looking at the electrical drawing page 261 on the service manual from Gregory. It is the Earth. This is why the speedometer was not working.
The way I fixed it is by applying a thin strip of aluminium foil along where the cut was and fixed it with adhesive tape. It worked.
My special thanks go to Delcowizzid. I strongly recommend reading his notes and advice. He knows what he is talking about. It saved me changing the speed sensor where almost everyone asked me to replace.
Last edited by commvr93; 08-02-2010 at 11:57 AM. Reason: wrong name
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