opcom unable to read on pin 12

[teckynou]

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]

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]

china of course... the originl is SO expensive

[paro44]

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/f152/opcom-082010-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]

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]

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]

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]

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

I'll try reflash with v1.33

[teckynou]

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.

[teckynou]

Yeah!!!!!! It works!!!!!


the resistor between k-line and +12v (pin16) was 10kohms, whereas it should be 510ohm regarding the schematics and the datasheet of the component

[jjrp255630]

Yeah!!!!!! It works!!!!!


the resistor between k-line and +12v (pin16) was 10kohms, whereas it should be 510ohm regarding the schematics and the datasheet of the component

hi, i have a sililar problem, i can enter like you in airbag, instrument etc, i try to find that resistor but i think that my cable its diferent, can help me find that resistor?

[rob077]

hi, i have a sililar problem, i can enter like you in airbag, instrument etc, i try to find that resistor but i think that my cable its diferent, can help me find that resistor?

I read it is R32. Correct me if i'm wrong.

[MOBILTRONIC]

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]

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?

[zoro1]

Yeah!!!!!! It works!!!!!


the resistor between k-line and +12v (pin16) was 10kohms, whereas it should be 510ohm regarding the schematics and the datasheet of the component

Where did you find the shematic?
Please post it here?

[makjazz]

Can someone confirm this thing about the resistor value?
I have also the same problem and i checked all relays, and they are switching O.K.
When i select pin 12 relay for pin 12 is switching, but the line is not working.
I also swapped relay for pin 7 with relay for pin 12 but again pin 12 not working.
Any progress with this issue?

[teckynou]

I confirm that changing R32 resistor by a 510Ohm works!!!


I found the schematics of the OPCOM here : http://www.digital-kaos.co.uk/forums/f152/repair-op-com-hardware-procedure-156380/ in the HOW TO REPAIR OP-COM.rar (http://www.digital-kaos.co.uk/forums/attachments/f152/29140d1282738956-repair-op-com-hardware-procedure-how-repair-op-com.rar) file
or here : http://www.digital-kaos.co.uk/forums/f152/op-com-157337/ (3rd link)

the schematics is for the "old style" opcom interface : more relays, and doesn't have the PLCC20 chip.
But the K-line is the same as the new style interface. We can see R3 is a 510Ohm R3 is the same as R32 in the new style PCB.

If you check the datasheet of the L9637D chip, the typical application also show a 510Ohm resistor !!!

I made this modification few mounth ago, and it works fine!

[filou]

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.

[lupu_sandu]

filou: Your PCB is green or yellow?
If is green is old type, so in this case change ULN2003A

[Smove]

Tank you for the instruction. Ich will try it.

[Smove]

Ok I tried it with 560 Ohm Resistor on R3, but it doesn't work.
Does anyone know, where I can buy a OP-COM with a running PIN 12?
Best Regards

[naelraddad]

friends i confirm that resistor R32 need to be changed from 10k to 510-590 ohm i solved my interface with resistor 560 ohm
it is yellow one

regards

[Smove]

I haven't a resistor R32 and the Resistor R3 is a 1KOhm. It is not the right. Theire are 3 resistors with 10kOhm. But I don't know which one.
- R5
- R12
- R9
Ich thin I have another platin.

[kowa1981]

hello,
i have a opcom.5 2007-12-10 with green pcb.

there are only resistor from r1-r30.
on the resistor r3 is printed "102"
is this the right resistor to change?

have anybody a link for a shop with working usb-opcom for a astra g 1999 on pin 12?

thanks

[mattydr67]

Lupu Sandu told you what you need to change when you got an OP-COm with old green PCB.
The resistor R3 is 1 KOhm and it must to work.
The R32 you have to change just in the new yellow PCB Op-Com's
But I have a problems. The interface works just on HW-CAN but it dosen't on SW-CAN.
Any solutions?
Good luck

[manocao]

I confirm that changing R32 resistor by a 510Ohm works!!!


I found the schematics of the OPCOM here : http://www.digital-kaos.co.uk/forums/f152/repair-op-com-hardware-procedure-156380/ in the HOW TO REPAIR OP-COM.rar (http://www.digital-kaos.co.uk/forums/attachments/f152/29140d1282738956-repair-op-com-hardware-procedure-how-repair-op-com.rar) file
or here : http://www.digital-kaos.co.uk/forums/f152/op-com-157337/ (3rd link)

the schematics is for the "old style" opcom interface : more relays, and doesn't have the PLCC20 chip.
But the K-line is the same as the new style interface. We can see R3 is a 510Ohm R3 is the same as R32 in the new style PCB.

If you check the datasheet of the L9637D chip, the typical application also show a 510Ohm resistor !!!

I made this modification few mounth ago, and it works fine!

changing R3 1k to 510 ohm is not valid for our OPCOM.5 2007-12-10 green pcb like this:
http://img843.imageshack.us/img843/4523/38d672d1dc48de2c36a762f.jpg
(front side: http://img213.imageshack.us/img213/4955/53af8de1c5efc6aa1221f37.jpg)


it is only valid for OP-COM [V2.0] green pcb
http://img17.imageshack.us/img17/3343/interoben.jpg

http://img684.imageshack.us/img684/5050/interunten.jpg

http://img401.imageshack.us/img401/672/schopcom.jpg

R3 in green OPCOM .5 2007-12-10 pcb is not the same than R32 in OPCom2010 yellow pcb
http://img36.imageshack.us/img36/307/b373766a1715421e031bd0c.jpg

http://img706.imageshack.us/img706/6862/ed653d08b6b00353ca5b108.jpg

R3 is connected to D1 in OP-COM [V2.0] green pcb but not in OPCOM.5 2007-12-10 green pcb

it must be other resitor than R3 which we must change in OPCOM.5 2007-12-10 green pcb!


EDIT:

confirmed! tested!

R3 in OP-COM [V2.0] green pcb is the same than R19 in OPCOM.5 2007-12-10 green pcb, which is already 510 ohm (factory set, marked 511 = 510 ohm)

after checking continuity with multitester, the path in OPCOM.5 2007-12-10 green pcb is:

OBD2 pin 16 (+12v) > pcb connector pin 10 (=JP1 pin 10 in OP-COM [V2.0] green pcb) > D2 (=D1 in OP-COM [V2.0] green pcb) > R19 (=R3 in OP-COM [V2.0] green pcb)

so there is no need to change any resistor in OPCOM.5 2007-12-10 green pcb, only R32 resistor in OPCom2010 yellow pcb!

[mattydr67]

Very good work my friend
So in conclusion we don't need to change that R3 rezistor because it is not the same as in the schematic.
Me I did this and I told you that it seems that it is a littel bit faster when you connect to the KW81, KW82 controlers.
BTW in one care that I test this ( Astra G 2000 1.4 ) in one of the controlers ( Central Doors locking ) before changing that rezistor I had an eror, after I change it I haven't.
And in the others it is a litel bit faster.
Good luck

[manocao]

hi matty!
i guess lowering R3 resistance in OPCOM .5 2007-12-10 pcb gets faster speed and no errors because R3 is connected to R14 and then to a transistor which is directly connected to pin 21 of 18F458 PIC
R3 in OPCOM .5 2007-12-10 pcb is the same than R13 in OP-COM [V2.0] green pcb, which links to the transistor and GND (see schematic)
http://img401.imageshack.us/img401/672/schopcom.jpg

maybe you have noticed the wires soldered in OP-COM [V2.0] green pcb, they are factory set, i didnt solder them, i have seen it in some other pics, i dont have OP-COM [V2.0] green pcb myself but OPCOM .5 2007-12-10 pcb
http://img17.imageshack.us/img17/3343/interoben.jpg

http://img684.imageshack.us/img684/5050/interunten.jpg

br

[ROMIKUS]

I have OPCOM .5 2007-12-10 for me unstable to pin 12.What is the solution?

[Bruce55]

does somebody have solution for sw can problem

[hopauss]

Hello guys,
I'm also trying to find a solution for sw-can not connecting.
I have OP-com v5 2007-12-10 interface.I updated the FW to 1.45, also changed the mcp2551 trnscievers , and it still doesent want to comunicate with sw-can. Now i've ordered the ULN2003a , and change that and see what happends .
I've also checked all the relays and they are all working fine, so i rule them out of the ecuation.
I have ran out of ideeas on what to change or where to look to find the problem.
411979

[MIKUr1]

Sorry for bumping thread, but i have exactly same problem. Can't connect to anything on SW-CAN. I have good version Opcom_new with PIC18. Tried to downgrade to 1.45, checked relays and still nothing. Did anyone managed what is wrong?