[Green Egg]

Thanks for the pictures.
I checked my KESSY and the resistors (0.22 ohm) are fine, they might have been removed to separate portions of the circuit. It's a fusible resistor.
The transistor is a MOSFET and I just ordered few at buck a piece from here.
I'll let you know if it help me.
Cheers.

Assuming it helps you, it would be nice to see exactly which parts were at fault. May lead to easier diagnosis for others.

 

[joeames]

Looking forward to this myself. Mine is now acting up!

 

[Krakonosh]

I just replaced the two MOSFETs and bingo! It's working .
So far anyway.
My wife just took one daughter to piano lesson (15 min drive) and reported that it still works.
I'm hoping it stays that way.
Thanks again Bobby.
Cheers.

 

[Tregmofo]

Subscribed

 

[nickm]

I just replaced the two MOSFETs and bingo! It's working .
So far anyway.
My wife just took one daughter to piano lesson (15 min drive) and reported that it still works.
I'm hoping it stays that way.
Thanks again Bobby.
Cheers.

Spectacular news!

 

[joeames]

Bad run of transistors? I think I've got a different problem as the LR door lock button stopped working after feeling like mush for a few weeks. The other handles worked fine until recently. Often as not now, if I get the other handles to lock the door the car unlocks immediately -- as thought the LR button is shorted out or stuck as, next morning, it works fine again (except for that particular handle).

 

[Krakonosh]

It's been few weeks and it still works.
Best $2 ever spent.
Cheers.

 

[Stryker]

It's been few weeks and it still works.
Best $2 ever spent.
Cheers.

What problems were you having with your kessy unit?

I am having some quirks and am wondering if should have a look at mine?

 

[NC-VW]

How did you diagnose the transistors as being faulty?

It's been few weeks and it still works.
Best $2 ever spent.
Cheers.

 

[Bobby78]

How did you diagnose the transistors as being faulty?

Read similar posts on this forum concerning KESSY. Scan KESSY ECU with VAG-COM and if you have DTC's on antennas in right and left doors, rear bumper and one of two interior antennas, then pretty sure that one or two transistors and may be a few resistors in KESSY ECU are dead.

 

[Albert zhang]

access auth module

i have a similar problem, when i driving there are " move selector to parking position" coming out. so i bring it to vw delership, they said my access auth module(kessy module?) was bad which i need to change a new one also. hey man, its so costly --! $1000!!!!! just a module??? now, i want to order one from other delership insted of cost $1000 doing my delership. ( sorry for my poor english)

 

[Bobby78]

i have a similar problem, when i driving there are " move selector to parking position" coming out. so i bring it to vw delership, they said my access auth module(kessy module?) was bad which i need to change a new one also. hey man, its so costly --! $1000!!!!! just a module??? now, i want to order one from other delership insted of cost $1000 doing my delership. ( sorry for my poor english)

Before you order new KESSY ECU just ask the dealer to show you VAS printout, just to be sure what is wrong with you KESSY. Your case is the first, known to me at least, with such symptoms of KESSY ECU problem. "Move selector to parking position" warning basically shouldn't be anyhow connected with access authorization system. Do you have a Start/Stop button in you Treg? The start/stop system also controlled by KESSY ECU and should be depended of transmission selector position.

 

[Stryker]

Before you order new KESSY ECU just ask the dealer to show you VAS printout, just to be sure what is wrong with you KESSY. Your case is the first, known to me at least, with such symptoms of KESSY ECU problem. "Move selector to parking position" warning basically shouldn't be anyhow connected with access authorization system. Do you have a Start/Stop button in you Treg? The start/stop system also controlled by KESSY ECU and should be depended of transmission selector position.

I was having the exact same message along with some clicking in the area of the Kessy unit a couple of weeks ago. My battery was a little low in voltage, so I changed it.

The message has not returned since.

Joe

 

[mtimmy415]

Is there any body out that ., that can find a source or send me to a place to order those 0.22 ohm resistors., I have been looking around for a long time and couldn't find out.,

I have swapped out the two mofset brought the control unit back life from no communication from scan tool to all antenna error (that means the control unit actually can talk to the scan tool now)

I assume the few resistors needed to replace too but I cannot source those resistors.

thanks

 

[joeames]

Did you try Mouser?

Is there any body out that ., that can find a source or send me to a place to order those 0.22 ohm resistors., I have been looking around for a long time and couldn't find out.,

I have swapped out the two mofset brought the control unit back life from no communication from scan tool to all antenna error (that means the control unit actually can talk to the scan tool now)

I assume the few resistors needed to replace too but I cannot source those resistors.

thanks

 

[Krakonosh]

I believe those are fusible resistors, hard to find in that size. You could just wire it out to 0.25A glass fuse just to see if it works.
My antennas measured around 8 ohms. One was 54 ohms and it was bad (bumper left). I changed it.

 

[mtimmy415]

I had it special ordered from mouser, MELT 0.22 ohm resistor at 0.18 cents each., I replaced all 6 of them, and the 2 mofset ! and damn! the thing works as new (BTW I have a Cayenne turbo not a touareg,. but apperanty its the exact same module !

 

[Goalie_Ken]

subscribed.

 

[nickm]

I had it special ordered from mouser, MELT 0.22 ohm resistor at 0.18 cents each., I replaced all 6 of them, and the 2 mofset ! and damn! the thing works as new (BTW I have a Cayenne turbo not a touareg,. but apperanty its the exact same module !

The kessy is identical, I replaced my kessy with one I bought from the Porsche dealer. It came in a Porsche box but the kessy module itself has the VW logo and exact same markings as the defective one that came out of my Touareg.

 

[Phagus]

Question to Krakonosh and Bobby78.

My Kessy lost communication with the antennas long ago. So...

How to find out which resistors went kaput? Surely, the two transistors will have to be replaced, but there are quite a few resistors on that thing...

Thanks!

P.