RPM input

[RRSperry]

Where would you get a rpm signal for data acquisition?

[BMuu]

Where would you get a rpm signal for data acquisition?

Off the Diagnostics port, I cant remember what pin # if you have a bently it should tell you.

[techno550]

wire from the ECU to the instrument cluster for the tach. bentley manual will give the color/location.

[RRSperry]

So just taping the wire won't cause any signal degradation, or impedance problems? Is it just a pulse signal?

Thanks

[5mall5nail5]

It's a pulsed signal and although using a DMM would indicate ~5-6v signal pulsed, it's actually a 12v signal pulsed as I have found with a scope - seems most DMMs cannot aquire 12v pulsing fast, so it shows a 6v load at half duty basically.

[patrick S]

black wire
instrument cluster,26-pin, white connector, pin 20


or cruise control module, black wire, pin 8 in blue connector

or diagnostic connector, pin 1, black wire


or ews, pin 12 in yellow connector, black wire


do you want climate control # too?