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Coding mk4 caddy

Posted: 10 May 2021 18:41
by adrianmurtezaj
got a question. I wanted to add a RHD rear light to a caddy mk4 LHD (pq35 platform) and recode the fog light as reserve light.

Now when i code it, it doesnt work. When i code the light as a brake light, it works as a brake light.

It is channel b50 and i tried to code it as C28. Somebody who knows? Does something has to be changed in the longcoding of 09 to accept it?
byte 18 is 00 (eeprom) but that speaks for itself as it works as a brake light.

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Re: Coding mk4 caddy

Posted: 11 May 2021 08:49
by skodapilot
I didn't not work with light schemes for Pq35 for a lot of time, but as far as I remember, all functions have different priority and some combinations are unworking.
B50 can be used as foot well light, so you have to ensure that this option are disabled in LC.
Change of FW version can be good choice too and older version can be preferred than newest

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Re: Coding mk4 caddy

Posted: 11 May 2021 09:58
by adrianmurtezaj
skodapilot wrote:I didn't not work with light schemes for Pq35 for a lot of time, but as far as I remember, all functions have different priority and some combinations are unworking.
B50 can be used as foot well light, so you have to ensure that this option are disabled in LC.
Change of FW version can be good choice too and older version can be preferred than newest

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What i find really weird that is: when i code it off it doesnt have any function. When i code it as a brake light it works. But reverse not... Why?

B50 is footwell lights too but that is disabled in long coding

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Re: Coding mk4 caddy

Posted: 11 May 2021 10:27
by skodapilot
This is nature of old PQ35 platform: BCM outputs have small flexibility and limited operation modes that are depending of FW version

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Re: Coding mk4 caddy

Posted: 11 May 2021 10:28
by adrianmurtezaj
skodapilot wrote:This is nature of old PQ35 platform: BCM outputs have small flexibility and limited operation modes that are depending of FW version

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Can u help me how to fix? :)

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Re: Coding mk4 caddy

Posted: 11 May 2021 10:34
by skodapilot
Unfortunately, I have no solution for you, but FW is preferred for my opinion.

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Re: Coding mk4 caddy

Posted: 11 May 2021 10:34
by adrianmurtezaj
skodapilot wrote:Unfortunately, I have no solution for you, but FW is preferred for my opinion.

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How can i upgrade? Flash it?

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Re: Coding mk4 caddy

Posted: 11 May 2021 11:01
by skodapilot
adrianmurtezaj wrote: 11 May 2021 10:34How can i upgrade? Flash it?
Yes. I don't know current version of FW, so downgrade in some case can be helpful too, i.e. 06**->05**

Re: Coding mk4 caddy

Posted: 11 May 2021 11:03
by adrianmurtezaj
skodapilot wrote:
adrianmurtezaj wrote: 11 May 2021 10:34How can i upgrade? Flash it?
Yes. I don't know current version of FW, so downgrade in some case can be helpful too
Where can i find flash files for pq35 bcm?

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Re: Coding mk4 caddy

Posted: 11 May 2021 11:05
by skodapilot