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That covers all the steps starting at post #14. Its not much, basically make the change in the vehicle maintenance data, then auto-code all modules.
Yeah and thats what I dont want to do ( auto code all modules), since I dont want to delete other coding. I guess Ill just live with the grayed out spoiler option.
Yeah and thats what I dont want to do ( auto code all modules), since I dont want to delete other coding. I guess Ill just live with the grayed out spoiler option.
When you auto code all modules does it overwrite all of the previous coding to those modules that you have performed? I didn't think it did that. If it does, that would mean you would have to code all of your customizations into PIWIS (like LED Matrix headlight activation) every time you changed anything. I am not the authority on this at all, but it doesn't seem right. Hopefully some PIWIS Jedi will chime in and pull back the curtain.
When you auto code all modules does it overwrite all of the previous coding to those modules that you have performed? I didn't think it did that. If it does, that would mean you would have to code all of your customizations into PIWIS (like LED Matrix headlight activation) every time you changed anything. I am not the authority on this at all, but it doesn't seem right. Hopefully some PIWIS Jedi will chime in and pull back the curtain.
Yes it does, thats why you tell the dealership to only code the specific module relevant to the service. If you have the matrix coding, for example, and the dealership auto codes all modules, you will lose that coding. Auto code essentially writes everything back to the way the car was delivered.
Last edited by M3Inline6; Aug 22, 2025 at 01:05 PM.
It is also a POWER SUPPLY. I have a similar apparatus. It does not matter if the battery is a little low. The PS provides a steady system voltage for diagnostics rather than relying on battery power.
On most, you input the desired system voltage to be maintained and the PS starts at around 12.5v and gradually increases to the set voltage. Mine takes about 30 seconds to do this as I normally code at 13.6v. The PS is not delivering anywhere near its rated amperage to maintain the systems voltage at the set point. It is not in charging mode. Totally different process.
What is the make / model of the device youre referring to here?
Yeah and thats what I dont want to do ( auto code all modules), since I dont want to delete other coding. I guess Ill just live with the grayed out spoiler option.
ive been thinking about this post. When you first plug your PIWIS into your car and it reads all your modules I believe. Somebody can correct me if Im wrong. And then it knows what the settings are in each of those modules i.e. what programmed settings in each module. Then when you pick a particular module to code, change the setting, and then you do auto code and it writes back to all the modules. However it should only change the module that is now different from the initial reading that the PIWIS in each module when you synched up. At least I think thats how it works. Again hopefully some programming or coding master will chime in and confirm whether Im right or wrong, but I dont think it will overwrite previously re-coded modules.
ive been thinking about this post. When you first plug your PIWIS into your car and it reads all your modules I believe. Somebody can correct me if Im wrong. And then it knows what the settings are in each of those modules i.e. what programmed settings in each module. Then when you pick a particular module to code, change the setting, and then you do auto code and it writes back to all the modules. However it should only change the module that is now different from the initial reading that the PIWIS in each module when you synched up. At least I think thats how it works. Again hopefully some programming or coding master will chime in and confirm whether Im right or wrong, but I dont think it will overwrite previously re-coded modules.
Youre partially right. When you make a change in PIWIS, you can write to a module and save changes, but you do not have to auto code all modules. If you auto code, it will overwrite everything. Youll see what I mean when you begin playing around with PIWIS.
Last edited by M3Inline6; Aug 23, 2025 at 09:50 AM.
i’ve been thinking about this post. When you first plug your PIWIS into your car and it reads all your modules I believe. Somebody can correct me if I’m wrong. And then it knows what the settings are in each of those modules i.e. what programmed settings in each module. Then when you pick a particular module to code, change the setting, and then you do auto code and it writes back to all the modules. However it should only change the module that is now different from the initial reading that the PIWIS in each module when you synched up. At least I think that’s how it works. Again hopefully some programming or coding master will chime in and confirm whether I’m right or wrong, but I don’t think it will overwrite previously re-coded modules.
The module coding “defaults” for all of the possible vehicle configurations are stored in the gateway. When you “auto-code”, it just reads the stored vehicle configuration and what the coding settings are supposed to be for that module in that configuration, and writes it.
When you manually code, you just overwrite the module coding but not the table of defaults in the gateway.
While this can be annoying when you lose changes, it’s nice in that you can always take the car back to stock if you screw something up (assuming you saved your original vehicle configuration).
Hi guys! I have tried to read through all 55 pages of this thread.... but I get lost (I think personally coding with PWIS is above my skill level). So forgive me if this has already been asked/answered.
I have a 2021 992.1 Targa 4s.
1) Can the illumination of the numbers on instrument gauges (physical tach and screen for the others) be changed from white to green (Heritage gauge style). I have a white tach and black sport chrono and I would like to change to guagefaces.com heritage style faces, but would like to change the numeral colors to match (see pics of what I have and what i am trying to get to (from another members pic).
2) My speedometer gauge (immediate left of the tach) only has two display settings when i select that gauge and roll the wheel to change images: Speedo only WITH NOT FULL NEEDLE, JUST THE TIP* OR Nav instructions (again see pics). On another thread on this members suggested that the FULL NEEDLE view was a 21 ---> 22 change and that *maybe* it could be coded in. CAN IT?
3) Probably related to #2 above, I also do not have (or cant find) the option to switch from 5 guage display to 3 gauge display. It was suggested that is might also be a code-able 21 ---> 22 change?
if any of the answers are yes..... there is beer, coffee, bbq in it for anyone in austin who has a PWIS and will help me code them
Thanks in advance
-mark
* I can already hear the bad just the tip jokes!
Another Rennlister's very sexy Heritage gauges....note the green numbers on the perimeter of the tach, speedo, clock and temp/fuel gauges. Can i get this on my non-heritage 2021 992.1?
My car... White Tach, middle left gauge
My car middle left gauge in speedo only mode---note NOT full needle
My car, middle left gauge in NAV mode
The answer to your question(s) is yes and no.
Yes, you can change the illumination of the numbers from white to green, but in order to do that, you have to go into KOMBI and change the dash splash screen to Sport Classic, 911 S/T, etc. I did it on my own car, but the drawback to that is the model designation will not be accurate for your car. Whenever you turn on the car, itll show whatever model designation you chose to achieve the green illumination.
No, you cant change the center tach to a heritage style tach without taking the cluster apart. That juice will likely not be worth the squeeze if you arent mechanically inclined.
Last edited by M3Inline6; Aug 31, 2025 at 04:29 AM.
Would there be a red or night option like on BMW's for backlight rather than green? The speedo does have multiple options.
I tried the gruen option from the speedometer needle drop down menu, but it didnt change the color. If I remember correctly, you were only able to get the rot color to work, right?
As far as the backlight, nothing I tried in terms of individual value changes worked. The only way I succeeded in making the change was to use the cluster setting from one of the aforementioned cars. I ended up changing it back because I didnt want to see Sport Classic or 911 S/T on my dash, but I really do like the green numbers and dial selector lighting. I will play around in KOMBI a bit more to see if I can figure out a way to change the backlight value without changing the model designation. There has to be a way considering the dash does change to green like the special cars.
Last edited by M3Inline6; Aug 31, 2025 at 03:13 PM.
I only tried the red; did you Auto code that module? If you didn't then it won't work.
Are there other options than green for backlight; red ? Are you in E or V mode? Did you notice any change in the VOF value (meaning did it change to S/T or Classic as well) when you changed the Kombi value? What specific option did you change in Kombi?
I only tried the red; did you Auto code that module? If you didn't then it won't work.
Are there other options than green for backlight; red ? Are you in E or V mode? Did you notice any change in the VOF value (meaning did it change to S/T or Classic as well) when you changed the Kombi value? What specific option did you change in Kombi?
siberian
When do you need to autocode and when not?
All coding changes Ive done just need a write and save.
I thought autocoding was when you modify an option in VOF and need to change multiple ecu config files to make it work?
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