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***alsamaraee*** · 14-11-2018, 09:08 AM,

(12-11-2018, 21:41 PM)Fx82 Wrote: Change back the production date of your car and code heater. Let see what error codes come up.

Ok I’ll. Another thing I recognized, that all LCI models that I checked and have TT evo. They don’t have S534A automatic air conditioning. Mine has that option.
Maybe if I delete the option solves the problem?
I think I will try this today.

***Fx82*** · 14-11-2018, 09:38 AM,

It doesn't matter. Heater will always work with 534.

***alsamaraee*** · 14-11-2018, 10:36 AM,

(14-11-2018, 09:38 AM)Fx82 Wrote: It doesn't matter. Heater will always work with 534.

Even withe TT evo in LCI ?
I could found the S534A and S536A in pre LCI and TT vevo.

***Fx82*** · 14-11-2018, 10:48 AM,

Can you give me the p/n of TT evo?

***alsamaraee*** · 14-11-2018, 11:50 AM,

p/n 9028438C.

I just need to understand it clearly. Does the IHKA get the CAN message and translate it to LIN message?
Or get a CAN message and send it's own LIN message?
Because if the message that goes to heater is sent directlly from IHKA I sould solve the compatibility problem by updating the IHKA and VO new date(LCI). Which it didn't solve my problem.
Or maybe I need to update the new date before updating the ecu?
The question is what ecu send the CAN message?

***Fx82*** · 14-11-2018, 12:16 PM,

I'll check later for you.

***Fx82*** · 14-11-2018, 22:06 PM,

The heater get a lin bus signal directly from the junction box.
All the heaters are backwards compatible for pre-lci and lci.

***alsamaraee*** · 14-11-2018, 22:44 PM,

(14-11-2018, 22:06 PM)Fx82 Wrote: The heater get a lin bus signal directly from the junction box.
All the heaters are backwards compatible for pre-lci and lci.

Thank you for reply. Where is the problem you think ?

I can conferm that the wiring are correctlly instaled. The heater itself working fine. All i can do in ISTA is starting the fuel pump. anything else does not respons. Like run the change over valve and the cerculation pump. The heater temperature shows 999. Can't set voltage lower limet shows 000 volt. When connecting the lin wire the change over valve just keep klicking and no heating in the car.

According to a guy working in Webasto in Sweden so the TT evo and TT vevo have not the same messages.

***alsamaraee*** · 18-11-2018, 02:53 AM,

TT evo W-bus version 4.1
TT vevo W-bus version 3.3
So it has to be coded in the car to match the W-bus version.

04-12-2018, 12:07 PM,

(18-11-2018, 02:53 AM)alsamaraee Wrote: TT evo W-bus version 4.1
TT vevo W-bus version 3.3
So it has to be coded in the car to match the W-bus version.

Did you solved your problem?

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