BCM PQ35 5K0 937

IDAR DIAG VAG · Jul 25, 2020

Goodmorning everyone
I have a problem with this bcm pQ35 5K0 937 086J from a vw touran tdi 2012
it is not read with any diagnostic tool
it seems to me that he has a problem with eeprom because they have changed a byte in the electric unit 09
now I want to read this bcm at the table, with which programmer you can do it
thank you so much

Uwe · Jul 25, 2020

Split from this thread because the question has nothing to do with VCDS.

-Uwe-

IDAR DIAG VAG · Jul 26, 2020

good morning Uwe
the problem came when I changed the control unit 09 the beyt 18 changed the decimal (8E )and then started the problem, all the electrical functions are caused
thank you so much for your response, uwe

Uwe · Jul 26, 2020

There's a reason why we have this warning in the software about Byte 18:

-Uwe-

Mari · Jul 26, 2020

There are lots of warnings on the WWW and on this forum not to play around with byte 18... Why did you change byte 18? For what purpose?

IDAR DIAG VAG · Jul 26, 2020

I changed it by mistake
how can I do now to solve the problem?
grazie

AINils · Jul 27, 2020

Bring back right value. If it was "00" then you have to modify it by a tool from poland or bring in the right value besides "00". But if you give the right value we'll need to have a Scan of your car and the right Light types

IDAR DIAG VAG · Jul 27, 2020

Good morning
Thanks for the reply
I try today.
I hope it gives me access to the central unit 09 to modify bit 7 in byte 18

Uwe · Jul 27, 2020

AINils said:
Bring back right value. If it was "00" then you have to modify it by a tool from poland or bring in the right value besides "00". But if you give the right value we'll need to have a Scan of your car and the right Light types

Didn't the OP say, "it is not read with any diagnostic tool"?

-Uwe-

IDAR DIAG VAG · Jul 27, 2020

I tried with my vcds HEX NET
the electric unit 09 cannot be read
when i turn on the ignition, all light start dancing

*

PetrolDave · Jul 28, 2020

idar1975 said:
I tried with my vcds HEX NET
the electric unit 09 cannot be read
when i turn on the ignition, all light start dancing 臘*

Sounds like you need to do some basic fault finding - check the power (including fuses), ground and CAN bus connections to the #09 module.

AINils · Jul 29, 2020

I know some of these units need a closed driver door, and unlocked all doors. Some of them are princess. Did you tried it ? Normally you can`t kill them by bad byte 18 codings. Only a few amount of pieces will die, but it`s hard to recover them after it

IDAR DIAG VAG · Aug 6, 2020

thank you very much, AINils for your reply
I had returned that bcm with another used bcm of a similar 2011 Audi A3, it made me work and hedlaghit in front, wipers and arrows. however the brake light no longer comes on.
I copied the code from another bcm of an equal touran
now everything works except the remote control, he didn't want to adapt
thank you for your sharing of this problem

BCM PQ35 5K0 937

IDAR DIAG VAG

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Uwe

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IDAR DIAG VAG

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Uwe

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Mari

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IDAR DIAG VAG

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AINils

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Uwe

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IDAR DIAG VAG

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AINils

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