Read Suzuki Vitara Tacho meter

Other Hardware Sensors
1

Hi everyone,

I wanted to DIY a tachometer using arduino for my Suzuki Vitara JLX 1997.

The current wiring diagram in my car is "Ignitor -> noise supressor signal -> tachometer/ecu"

Is there a way to read the signal without interfering the existing circuit in the car?

image
image719×597 96.6 KB

2

Hi, @chewyuinyee
Welcome to the forum.

Thanks for the car wiring diagram.

Have you Googled;

arduino tachometer car ignition

Tom.... :smiley: :+1: :coffee: :australia:

3

Hi Tom,

I did come across this diagram.

image
image589×194 14.7 KB

from:

But I not sure how it will impact the ECU or Tacho display in the existing system in my car.

It is possible to just "TACH_SIGNAL" directly to the brown wire ?

4

Possibly not as that brown wire has a series capacitor filter circuit in series.

image
image601×683 69.2 KB

The brown circuit might be loaded down by the input of the circuit you have in post #3.

Tom.... :smiley: :+1: :coffee: :australia:

5

It is meant to connect directly to the coil, but i am not mistaken, it should be on the GND side, where the induction of the coil triggers the opto-coupler.

6

This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.