opcom unable to read on pin 12

**teckynou** · 16th December, 2010, 02:36 PM

Hi

I've an astra Z22SE 2001.

my opcom is not able to read any device on pin 12 : airbag, instrument, CID, ....
I don't know why.

I have 090714 version.

with the demo version (serial and basic inteface), it works, so the probleme in not in my car.

any idea?

PS : my laptop is really old and run under Windows 2000

**Liteace** · 16th December, 2010, 03:55 PM

Its it original op com or china op com if original contact op-com if china buy another as they dont cost a lot, it could be the relay inside the op-com not switching to pin 12

**teckynou** · 16th December, 2010, 04:00 PM

china of course... the originl is SO expensive

**paro44** · 16th December, 2010, 04:37 PM

If it works with demo but not with delievered software, you can try other versions from this thread (http://www.digital-kaos.co.uk/forums...2010-a-161300/).

082010 seems to be a good version, try it.

Or did i get it wrong and demo works only with a basic (kkl) cable and not with your op-com multiplexer?

Sorry for bold text, can't disable it atm.

**teckynou** · 16th December, 2010, 05:14 PM

the demo version works with a basic kkl interface, on a serial port, not with the opcom multiplexer.
So, the multiplexer may be bad... I just bought it, so I don't want to buy a new one

**paro44** · 17th December, 2010, 12:20 PM

Maybe you can manually bridge pin 12 with pin 7 of your opcom (solder them together), if relay isn't working?
For fiat cars it is possible to connect pin 1 and 3 with 7. I don't know if that works for opel, if that can damage your car or interface or if opcom software works with such interface.
Maybe you can try it with a kkl cable first and switch pin 7 with 12 to see if it works.

This is only a guess, maybe someone can confirm or correct it?

**teckynou** · 17th December, 2010, 12:30 PM

I made some test :

try 090821D software : still doesn't work
try 082010 china software : still doesn't work

open the interface, ans cross the wire pin 7 and 12, Then :
- diagnostic the engine (normally pin 7) and force the sofware to use pin 12 (because wire are cross) : Works -> so electronics and relay works
- diagnostic instrument (normally pin 12) and force the sofware to use pin 7 (because wire are cross) : doesn't work

So, electronics and relays are Ok.

I'll try to reflash the Pic inside the interface, because I think there is a probleme in PW82 protocole (used on pin 12)

**teckynou** · 17th December, 2010, 01:12 PM

I reflash my interface V1.39 by V1.39.... still doesn't work

I'll try reflash with v1.33

**teckynou** · 17th December, 2010, 01:34 PM

what is the difference between interface type rev A/B/C or D in the software?

I also scheck the schematic which can be found in this forum, my interface is different.

**MOBILTRONIC** · 3rd March, 2011, 10:06 PM

Originally Posted by paro44

Maybe you can manually bridge pin 12 with pin 7 of your opcom (solder them together), if relay isn't working?
For fiat cars it is possible to connect pin 1 and 3 with 7. I don't know if that works for opel, if that can damage your car or interface or if opcom software works with such interface.
Maybe you can try it with a kkl cable first and switch pin 7 with 12 to see if it works.

This is only a guess, maybe someone can confirm or correct it?

Hello,mates.In such a case,can try to re-solder all relays or replace them with the new one,that go to 8 and 12 pin or the easiest,connect 8 and 12 pins together.Everything works as usual.Regards.

**brchip** · 3rd March, 2011, 10:20 PM

I have a similar problem. Do you have any pics of this resistor?

Are you sure it's safe to change it to a much lower value?

**filou** · 3rd May, 2011, 09:19 AM

hi hello,

I have the same problem with my op-com clone.
but I cannot locate R32 on the circuit board.
I can find all other resistors R1 ... R29 but there?s no R32.
Can anybody help, maybe with a photo ?

many thanks.