ECU Pinout Diagrams (How to make sense of them)

[B1]

So I am trying to hook my Monit Tripmeter into the rally car, I have the plug in speed sensor interface wiring thing but I need to connect the 2 wires to the speed sensor wiring, Now I have found the following ECU Pinouts page http://www.jollygreenmonster.com/help.htm And if you look at ECU pinouts and scroll down my car would be the 99-00 Impreza (Version 6 STi)

So are these diagrams of the actual ECU or looking at the plugs that plug into the ECU?

Im guessing I need to connect to B135 pin 26 and a ground somewhere with the other wire? Maybe B134 pin 17?

Thanks in advance

[Rosssub]

 B1 said:

So I am trying to hook my Monit Tripmeter into the rally car, I have the plug in speed sensor interface wiring thing but I need to connect the 2 wires to the speed sensor wiring, Now I have found the following ECU Pinouts page http://www.jollygreenmonster.com/help.htm And if you look at ECU pinouts and scroll down my car would be the 99-00 Impreza (Version 6 STi)

So are these diagrams of the actual ECU or looking at the plugs that plug into the ECU?

Im guessing I need to connect to B135 pin 26 and a ground somewhere with the other wire? Maybe B134 pin 17?

Thanks in advance

The Speed Sensor Wire, needs to "Bypass" through your new toy.

Correct, Pin 26 on Plug 135 (grey-middle plug). Bottom corner pin, closest to the Blue? Plug.

Count the Pins either side to make sure you have the right corner Pin. (3 pins on side and 4 pins on the other.)

Cut the Speed Wire (green/black I think), about 100-150mm from you ECU.

One of your Monit Wires will solder to the ECU end of the Cut Speed Wire, the other Monit wire will solder to the Engine Loom end of the cut Speed Wire.

The Diagram your using is looking at the ECU Pins, I count the Pins either side of the Plugs Centre Hole. 3 on one side 4 on the other.

[B1]

 Rosssub']

[quote name='B1 said:

So I am trying to hook my Monit Tripmeter into the rally car, I have the plug in speed sensor interface wiring thing but I need to connect the 2 wires to the speed sensor wiring, Now I have found the following ECU Pinouts page url]http://www.jollygreenmonster.com/help.htm[/url] And if you look at ECU pinouts and scroll down my car would be the 99-00 Impreza (Version 6 STi)

So are these diagrams of the actual ECU or looking at the plugs that plug into the ECU?

Im guessing I need to connect to B135 pin 26 and a ground somewhere with the other wire? Maybe B134 pin 17?

Thanks in advance

The Speed Sensor Wire, needs to "Bypass" through your new toy.

Correct, Pin 26 on Plug 135 (grey-middle plug). Bottom corner pin, closest to the Blue? Plug.

Count the Pins either side to make sure you have the right corner Pin. (3 pins on side and 4 pins on the other.)

Cut the Speed Wire (green/black I think), about 100-150mm from you ECU.

One of your Monit Wires will solder to the ECU end of the Cut Speed Wire, the other Monit wire will solder to the Engine Loom end of the cut Speed Wire.

The Diagram your using is looking at the ECU Pins, I count the Pins either side of the Plugs Centre Hole. 3 on one side 4 on the other.

OK, the monit instructions say its connected in parallel rather than in series like you said? Are you sure that is correct? So one wire goes to GND and the other to the speed sensor wire according to them

OK, so I found the installation guide for the apexi rsm and it is really handy for what I need, Even shows you what pins and which way to look at them etc... So it looks like I was correct in plug 135 pin 26 but the gnd I need in plug 134 pin 8, According to the guide its the pins as you look at them while holding the ECU (as you said)

Now im off to see if I can start an electrical fire lol

[Rosssub]

 B1']

[quote name='B1 said:

So I am trying to hook my Monit Tripmeter into the rally car, I have the plug in speed sensor interface wiring thing but I need to connect the 2 wires to the speed sensor wiring, Now I have found the following ECU Pinouts page url]http://www.jollygreenmonster.com/help.htm[/url] And if you look at ECU pinouts and scroll down my car would be the 99-00 Impreza (Version 6 STi)

So are these diagrams of the actual ECU or looking at the plugs that plug into the ECU?

Im guessing I need to connect to B135 pin 26 and a ground somewhere with the other wire? Maybe B134 pin 17?

Thanks in advance

The Speed Sensor Wire, needs to "Bypass" through your new toy.

Correct, Pin 26 on Plug 135 (grey-middle plug). Bottom corner pin, closest to the Blue? Plug.

Count the Pins either side to make sure you have the right corner Pin. (3 pins on side and 4 pins on the other.)

Cut the Speed Wire (green/black I think), about 100-150mm from you ECU.

One of your Monit Wires will solder to the ECU end of the Cut Speed Wire, the other Monit wire will solder to the Engine Loom end of the cut Speed Wire.

The Diagram your using is looking at the ECU Pins, I count the Pins either side of the Plugs Centre Hole. 3 on one side 4 on the other.

OK, the monit instructions say its connected in parallel rather than in series like you said? Are you sure that is correct? So one wire goes to GND and the other to the speed sensor wire according to them

OK, so I found the installation guide for the apexi rsm and it is really handy for what I need, Even shows you what pins and which way to look at them etc... So it looks like I was correct in plug 135 pin 26 but the gnd I need in plug 134 pin 8, According to the guide its the pins as you look at them while holding the ECU (as you said)

Now im off to see if I can start an electrical fire lol

Sweet, so they both just splice in. Pin 8 on plug 134 is the Power Line Ground or the ECU\'s main Earth for all Sensors.

Edit: Pin 17 Plug 134 is the Injectors Earth.

[B1]

Seemed to work well, Thanks for the advice

[Rosssub]

 B1 said:

Seemed to work well, Thanks for the advice

Nice. ;D

You didn\'t need any help.