S2000 Under The Hood S2000 Technical and Mechanical discussions.

Signal Taps?

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Old Sep 15, 2002 | 06:02 PM
  #1  
Wildncrazy's Avatar
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Default Signal Taps?

Can any one tell me the easiest and best way (that will have the least potential future consequences) to tap into:

VTEC
TPS
a vacuum signal
Tach
& maybe the speedo

I have been perusing the manual, but haven't actually made it under the hood yet. Some of the Acronyms they use make we wonder if I even understand what some of the connectors are for.
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Old Sep 15, 2002 | 09:17 PM
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From: Driving around idiots in TX
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This will at least help you with most of them... no speedo.



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Old Sep 16, 2002 | 05:02 AM
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Hey thanx. I have the manual, but that diagram wasn't in it. Now where is this connector?

I am guessing Pressure Signal is vacuum?

Speedo appears to have 2 different spots I can tap, off the VSS or the Electric Power steering.
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Old Sep 16, 2002 | 09:23 AM
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From: Fort Worth
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David, I assume you know this but will post for the edification of others.

Those signals are NOT all 12V and some are driven by the ECU. As such, they are intended to drive high impedance loads and should NOT be used to drive things like relays or solenoids, etc. I'd limit them to loads in the kilo-ohms or even higher. Ideally, you would want to buffer the signal through a signal buffer and/or transistor to drive something lower impedance.

The tach and speedo have a few different spots you can tap from... all should be the same signal, regardless of location.

David, since you're local... email me if you need or want help getting the factory pins out of the ECU or crimping new ones on. A V-AFC harness might serve you well, here, for easy installation/removal.

The drawing that is shown is the ECU. Look under the Fuel/Emissions section for the detailed drawing. The ECU is located behind the driver's kick panel, just above the fuse block.

Pressure Signal is MAP or manifold vacuum. The manual should detail how it works, I have a spare MAP you can borrow if you need to test (high impedance loads only, please ).
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