# VSS Input 12V tolerant?

**URL:** <https://community.ecumaster.com/t/vss-input-12v-tolerant/3105>\
**Category:** EMU BLACK / CLASSIC\
**Created:** [January 25, 2025, 5:49pm UTC](https://community.ecumaster.com/t/vss-input-12v-tolerant/3105 "2025-01-25T17:49:13Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![Localrider](https://avatars.discourse-cdn.com/v4/letter/l/b487fb/32.png) [@Localrider](https://community.ecumaster.com/u/Localrider)\
**Post date:** [January 25, 2025, 5:49pm UTC](https://community.ecumaster.com/t/vss-input-12v-tolerant/3105/1 "2025-01-25T17:49:13Z")

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Hello Guys,

Just a quick question…

The VSS Sensor from my 02A Volkswagen gear needs 12V supply. Can i connect the Signal (approx. 9V amplitude) directly to VSS in? And should i use Sensor Ground or better Engine/ECU Ground in this case?

Hope you have some suggestions.

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**Author:** ![sourcerer](https://avatars.discourse-cdn.com/v4/letter/s/45deac/32.png) [@sourcerer](https://community.ecumaster.com/u/sourcerer)\
**Post date:** [January 26, 2025, 6:45pm UTC](https://community.ecumaster.com/t/vss-input-12v-tolerant/3105/2 "2025-01-26T18:45:19Z")

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You can use 2 10k ohm ressistor to make a voltage divider 1/2. so ecu input voltage half of sensors output voltage

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<div class="post-metadata">

**Author:** ![Localrider](https://avatars.discourse-cdn.com/v4/letter/l/b487fb/32.png) [@Localrider](https://community.ecumaster.com/u/Localrider)\
**Post date:** [January 27, 2025, 5:44pm UTC](https://community.ecumaster.com/t/vss-input-12v-tolerant/3105/3 "2025-01-27T17:44:15Z")

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Ok, i hoped that the input is 12V tolerant as it only counts the frequency and not measuring voltage

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**Author:** ![Greg](https://avatars.discourse-cdn.com/v4/letter/g/71c47a/32.png) [@Greg](https://community.ecumaster.com/u/Greg)\
**Post date:** [January 27, 2025, 5:52pm UTC](https://community.ecumaster.com/t/vss-input-12v-tolerant/3105/4 "2025-01-27T17:52:33Z")

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> [@Localrider](#):
>
> 02A Volkswagen gear needs 12V

i would think this is hall type sensor switching to ground and hig z so voltage probably depenging on pullup value so all will be good .

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<div class="post-metadata">

**Author:** ![Localrider](https://avatars.discourse-cdn.com/v4/letter/l/b487fb/32.png) [@Localrider](https://community.ecumaster.com/u/Localrider)\
**Post date:** [January 28, 2025, 2:13pm UTC](https://community.ecumaster.com/t/vss-input-12v-tolerant/3105/5 "2025-01-28T14:13:41Z")

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Hello Greg,  
Yes it is a Hall Sensor.  
So i will try to connect it directly and set it up with pull-up 4K7, without any additional voltage divider. Just dont want to shoot off my input.

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<div class="post-metadata">

**Author:** ![Localrider](https://avatars.discourse-cdn.com/v4/letter/l/b487fb/32.png) [@Localrider](https://community.ecumaster.com/u/Localrider)\
**Post date:** [January 28, 2025, 2:18pm UTC](https://community.ecumaster.com/t/vss-input-12v-tolerant/3105/6 "2025-01-28T14:18:00Z")

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Should i use Sensor Ground or better Engine/ECU Ground?

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**Author:** ![Greg](https://avatars.discourse-cdn.com/v4/letter/g/71c47a/32.png) [@Greg](https://community.ecumaster.com/u/Greg)\
**Post date:** [January 28, 2025, 3:16pm UTC](https://community.ecumaster.com/t/vss-input-12v-tolerant/3105/7 "2025-01-28T15:16:28Z")

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I’m sure will be fine lots of camshaft positions are have supply 12v and work without issue . also i believe all inputs 12v tolerant