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Старый 25.04.2021, 16:29   #1
jcf
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По умолчанию VAF to MAF conversion on a VW T3 DJ WasserBoxer Vanagon

Hello Everybody,
I'm planning the installation of my converter on my T3, but have several questions because I'm unsure about my right understanding of the instructions.

First I understand that the lambda is mandatory for the first setup, but mine is badly placed in my opinion. I put it in the silencer (I soldered it by myself, there is no OEM place for a lambda in this exhaust, my lambda only serves for a dashboard gauge, since my ECU (Dijijet) doesn't take this information into account), so its signal is not very accurate I think (it goes regularly from very lean to very rich, but rarely between both, but maybe it's because of a worn VAF...).
  • Is it possible to use the converter without it or do I absolutely need to wire it to the converter despite the relative inaccuracy of the signal?
  • If it needs to be connected to the converter, is it possible to do it in parallel with my dashboard gauge or do I need to connect the converter alone?

Second, I have questions about the wiring.
  • I have +5V between 1-4 on my VAF and +4,6V between 1-2 (see https://www.dropbox.com/s/2l0ecgjhpf...itled.jpg?dl=0 for a caption of VW workshop manual). Should connection 1 of the car harness go to "JP1.2-Ref. Voltage In" Converter connection?
  • To which harness-debimeter connection should "8-Converter out" be connected?
  • Are the MAF converters connections the same between the siemens model you recommend and the ones from VAG brands? I have this one (for VW Passat) for the moment : https://fr.aliexpress.com/item/33033...27426c37I4ObrN, or what would be the way to know the right connection to the converter?
  • What is the 5-TPS or VAF in connection for? Is it meant to connect the two devices in serial and compare the two signals?

I have made a draft of the wiring plan which you can find here if needed for verification and comments => https://www.dropbox.com/s/wqn86sofvr...p1%29.pdf?dl=0

Thank you very much in advance for your help and have a nice Sunday ;-)
Jean-Christophe
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