NB VSS (Vehicle Speed Sensor) details?
#21
Hey guys,
I know this thread is oooooold but for me it is currently the only trace I have.
Im trying to build a hybrid dash and therefore need to read all data (RPM, Speed etc.) from the back of the cluster. I bought a signal generator and hooked it up to the ports of the VSS. This works fine and I can generate a sine wave and control the speedometer. My problem is that there is no output on 2L. I hooked my oscilloscope on 2L and 3J but Im getting nothing (except random nonsense).
Any ideas why?
Thanks!
I know this thread is oooooold but for me it is currently the only trace I have.
Im trying to build a hybrid dash and therefore need to read all data (RPM, Speed etc.) from the back of the cluster. I bought a signal generator and hooked it up to the ports of the VSS. This works fine and I can generate a sine wave and control the speedometer. My problem is that there is no output on 2L. I hooked my oscilloscope on 2L and 3J but Im getting nothing (except random nonsense).
Any ideas why?
Thanks!
If I look at the schematics for 1999 (mine) and a 2001, they're (in this part) similar. If the picture below is anything to go by, then I have no idea what 2L is supposed to do and 3J is just another ground wire.
#23
The signal that comes from 2L and goes to the PCM and Cruise Control module (mine came with one) is a tach signal. The CC mine came with was badly spliced into the 2L wire using that signal to maintain whatever rev you're at at them time of engaging.
I think the easiest solution is getting the Speeduino VR conditioner mentioned above and connect it to the VSS in parallel with the dash. That'll give a square signal with a fixed number of pulses per driven mile (as per the standard VSS output).
If you don't already have it, the full diagram for 2000 models is here: https://mega.nz/file/Z05SnRzA#AJ7835...e3a0AidM7s-FA8
#24
You are probably right but there is one problem: I live in germany and either the shipping fees are >70€ or they dont ship at all. If I want to print the board "myself" the MAX9926UAEE+ has a shortage and is currently not available... Thats a big problem for me -.-
The only board I could buy for 32€ (including shipping) is this board. But for me it looks like it couldnt handle the output of the VR Sensor. I read that it can output up top +-50V. What do you think? Could this board work?
The only board I could buy for 32€ (including shipping) is this board. But for me it looks like it couldnt handle the output of the VR Sensor. I read that it can output up top +-50V. What do you think? Could this board work?
Last edited by VogelPapaFinn; 05-02-2024 at 02:55 PM.
#25
You are probably right but there is one problem: I live in germany and either the shipping fees are >70€ or they dont ship at all. If I want to print the board "myself" the MAX9926UAEE+ has a shortage and is currently not available... Thats a big problem for me -.-
The only board I could buy for 32€ (including shipping) is this board. But for me it looks like it couldnt handle the output of the VR Sensor. I read that it can output up top +-50V. What do you think? Could this board work?
The only board I could buy for 32€ (including shipping) is this board. But for me it looks like it couldnt handle the output of the VR Sensor. I read that it can output up top +-50V. What do you think? Could this board work?
I sandwiched everything together between a test board and a piece of CF. It was a quick and dirty and will be rectified when i replace the Sinco dash shortly. Still haven't had any issues though ( :
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