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BCM issues and compatibility question

Discussion in 'VR - VS Holden Commodore (1993 - 1997)' started by Hivisibility, Feb 10, 2020.

  1. Hivisibility

    Hivisibility Member

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    Good day all.
    Olde faithful (V6 auto VR S-Pac ute)has been playing up again (might have to rename her to contrary Mary). She has been running beautifully for a few months, a little issue with leaky injectors and starter motor but all in all for a ute with 26 years and 4000000000000000 kilometres pretty good indeed.

    Now last week lots of rain, wipers wouldn't turn off everytime, beginning thursday, got streadily worse until I just had to disconnect them altogether, then the Cruise light came on permanently (the Cruise control hasn't worked in the time I've owned it), and then the central locking stopped working, then this morning it wouldn't turn over, nothing, no clicking, just the relay clicking in...

    So I tried the hit the key fob button just as you go to start and it starts... but ONLY if you do this...

    so rundown
    94 VR ute S-Pac V6
    VATs removed
    New/good Coil plate (DFI)
    New/good CAS
    Good fuel pump
    Dodgy injectors or pressure reg (floods after sitting for a few hours, no biggy always started)
    New Starter motor 3 weeks ago
    New battery 6 months ago tests great
    New reco alternator 4 months ago
    New fob Battery as of three hours ago

    Issues
    No cruise control (hasn't worked since I've owned it)
    Power mirrors don't work (haven't worked since I've owned it)
    Central locking and door solenoids not working as of today
    Cruise light on all the time (as of yesterday)
    Wipers not turning off/no intermittent function (as of last friday)
    Doesn't turn over/start unless you hit unlock/lock button on fob as you turn key (as of today)
    Key can be removed from barrel while car is running (just noticed this, but could have been like it for years)



    So yep I reckon this all points to BCM issues, anyone with the knowledge care to confirm this would be great....

    I'm not game to drive it anywhere now as I feel the next stage is total circuit failure (maybe water ingress from this insane wet weather) and will leave me needing a tow. I have plenty of other vehicles to use, this is just my favourite daily driving one...

    Next part of the question is if my guestimation is right...what BCM would work, as the levels do seem to apply to wagons and sedans, not having any success finding out about utes? can I use a sedan one, or does it have to be ute specific? Also would VS one be okay as I think if I can find the keys I have another one out of our project VS ute....

    Thanks in Advance.
     
  2. woteva

    woteva NEED 4 SPEED

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    VS bcm is not a straight swap into a VR as pinouts are different.
    If you already have a VS bcm and lots of time, it might be able to work ?

    For a straight swap replacement, pull yours out and post up a pic of the numbers from the sticker.
     
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  3. losh1971

    losh1971 Well-Known Member

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    You need a ute one and as mentioned above the serial number is the key. Basic Exec won't have the same features as S Pack ute, full poverty pack doesn't have cruise in VR.
     
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  4. losh1971

    losh1971 Well-Known Member

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    On that list of accessory faults may or may not be BCM. Common fault with mirrors is the switch, cruise common fault is the stalk and cruise cancellation switch. There can be other reasons for central locking not working too, besides the BCM. If you can get a BCM and key cheap enough its probably worth a try as it will require not much work if it irons out all the problems in one go.
     
  5. Trevor loves holden.

    Trevor loves holden. Well-Known Member

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    Model Variant Barcode Prefix Old Part Number Barcode Prefix New Part Number
    VR Manual O/R TDM A 92042522 A 92048790
    VR Manual O/R UTE U 92042761 U 92048787
    VR Manual O/R LOW L 92042498 L 92048788
    VR Manual O/R MID M 92044097 M 92048789

    VR TDM A 92048790 A 92048790
    VR UTE U 92048787 U 92048787
    VR LOW L 92048788 L 92048788
    VR V5V V 92048786 V 92048786
    VR MID M 92048789 M 92048789
    VR LUX X 92045885 X 92045885
    VR HIGH H 92049795 H 92049795
    VR EXP E 92048243 E 92048243

    VS UTE U 92049148 B 92055494
    VS LOW L 92049150 B 92055494
    VS MID M 92049146 C 92056492
    VS LUX X 92049147 F 92056493
    VS HIGH H 92049149 D 92055379
    VS EXP E 92054339 E 92054339
    VS ALM MID - KIT A M41321 A M41321

    Doctor Bob, Apr 13, 2008
     
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  6. Hivisibility

    Hivisibility Member

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    Thanks Guys... that info is great Trevor, really does all point to BCM, which controls (unnecessarily imo) these basic functions of the vehicle systems...
    It turns out i can get 2 from a bloke within my area with keyheads.....I'm changing drivelines this winter to a L67 which i built ages ago and has been looking for a home, so while I'm not fussy about too many creature comforts. I do like my cars to be reliable, streetable and have some basic functions like heater and A/cond.
     
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  7. Trevor loves holden.

    Trevor loves holden. Well-Known Member

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    You can only try, at less it narrows it down. If gremlin persist after the swap out then you will have to look into power supply to those areas,
    Cruise control- could be the motor or module or power supply.
    wipers wouldn't turn off - Stalk stuffed or relay stuck on.
    Power mirrors- either bad connection behind the door card or even broken wire in-between the door jam, switch has dirty contacts.
    Central locking and door solenoids not working- blown fuse or again broken wires between door jam.
    Cruise light on all the time - faulty switch or bad earth
    Doesn't turn over/start unless you hit unlock/lock button on fob as you turn key- battery you replaced isn't getting good contact or is not a alkaline battery or the pin on the fob isn't contacting the slip-ring.
    Key can be removed from barrel while car is running- Warn barrel so any blade will start your car even a transmission dip stick.
    These may be just a few things to check if the bcm has no effects. PS sounds more like a earth issue on somethings.
     
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  8. Hivisibility

    Hivisibility Member

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    Too right Trevor earth tracing back was my first thought, used to be common on the old Kingy one tonners and panelvans, the brake lights would come on when cigarette lighter or the likes was used... I'm sorta thinking that all of the BCM basic functions playing up is either a big coincidence OR the BCM has got condensation...like you say eliminate the simple then if still there chase the wiring...it has always been the way when I troubleshoot issues in anything electro-mechanical, do the bleedin' obvious first and 90% of the time you get it straight up.

    As an interesting aside the central locking started working this morning after disconnecting the battery for 12 hours, everything else listed is still not working.
     
  9. losh1971

    losh1971 Well-Known Member

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    I don't think it's your BCM. I think most of the problems are stemming from faulty switches. My ute had all the above failings except wipers. I never considered the BCM and neither was it the issue.
     
  10. _R_J_K_

    _R_J_K_ Well-Known Member

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    Gotta ask though, why do you have VATS disabled?
     
  11. losh1971

    losh1971 Well-Known Member

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    Interesting because VATS is disabled in my BCM too. Mine was like it when I bought it. I assumed a previous owner had issues with VATS preventing the engine from starting. Mine logs code 31 and has done since I have owned it.
     
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  12. Hivisibility

    Hivisibility Member

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    Losh is right....VATS and key/BCM compatibility is a common issue in older cars, or newer ones too sometime, so the easiest and most reliable fix is to have them literally turned off by someone with the right interface and machine. I bought my VR off a young mate who had just given up on why it would start occasionally leaving him stranded. I have other security and anti-theft measures at work so not really too much of an issue...
     
  13. Hivisibility

    Hivisibility Member

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    So got the replacement mid level BCM (and a spare ute low) yesterday. So this morning put it in and yep it worked and then the battery in the mated key died... now being a soldered in battery i damn near cried...because my eyes are not up to that real close in fine work anymore and the son who would normally do it for me is off on holidays on the goldie...

    So after my wife reminded me that this would never have stopped me 20 year ago and I was getting too used to throwing dollars at things that I can fix myself, crikey I built Australias first legal rotary powered toyota in the 80s, in a carport, in a regional town of less than 500 people, self reliance was the mother of all my inventions...hell the Girl is right so investigated the original BCM...

    These things are mostly just a relatively crude switching board as far as I can work out with a RF receiver and a specific chip...not too many amps go through them so have to be unlucky to have fried anything much unless a spike ran through them, and let's be honest, unless you are a complete moron you're not like to spike a cars' electrical system real easy...

    Mmm removed the PCB and checked both sides of the housing and yep water ingress.. had some corrosion on both sides, but no burning and some of that waxy white leftover gunk from a chemical reaction on the plastic housing. So cleaned the PCB with low pressure air and CRC 226, then cleaned the housings, gently physically cleaned the PCB and components with a soft brush... back into car and.........

    Everything works again....
     
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  14. losh1971

    losh1971 Well-Known Member

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    Do you have working mirrors now?
     
  15. Hivisibility

    Hivisibility Member

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    No Losh I just checked them, they are definitely the switch, they haven't worked since I have owned it, so took it for a short drive... everything back in order as it was 2 weeks ago... had a quick look at the switch and it is not healthy...
     
  16. losh1971

    losh1971 Well-Known Member

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    I have rebuilt the switches before. It is a fiddly job best done on a kitchen table while sitting as there are tiny springs inside. You lube it with a tiny bit of carbon conductive grease, available at Jaycar. Some say a VS switch will fit but I can't see how since it is a different shape when I looked them at the wreckers. Could probably swap the handle as well, then it would be no problem. I have had switches that didn't come good after a rebuild so it's not always a sure thing.
     
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