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Old 10-22-2003, 03:38 PM   #1
Silverevo8owner
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Join Date: Oct 2003
Location: 50 miles south of Columbus
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2003 Silver Evo 8
04 Silver STI

Exclamation Rpm and Speed signal wires from ECU?

DOes anybody know which two wires these are and color they are on the STI?

Im installing a turbo timer and i need to know which one these are.

PLEASE HELP!
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Old 10-22-2003, 04:24 PM   #2
DKG-GT
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Same prob im a noob to this I installed a Zero Sports starter switch and it is the same principal but I don't no where the RPM or e-brake wire is. Plus where I ordered my TT (HKS Type-0) they shorted me the wire to connected to the RPM signal. I guess I can use any wire but still got robed.

any help please..

Thanks
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Old 10-22-2003, 06:12 PM   #3
interiot
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You can download the service manuals from subaru. This is probably the section that contains the STi vehicle speed sensor line information. $20 gets you 72 hours of access, and you can download all the manuals with this tool if you have access to linux.
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Old 10-23-2003, 12:18 AM   #4
brunetmj
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2004 2.5 RS

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I personally do not recommend going to the ECU unless absolutely necessary. It is way to much wiring there and easy to make a mistake. Both the speed and tach wire can be picked up behind the instrument gauges. It is simple to remove and wires are far more accessible. I have used them and they work well.
The tach and speed wires can be picked up on connector I10. This connector (I10) , is the only ten pin connector of the three connectors on the back of the gauges. The tach wire is A5 on the connector I10. It is a green wire. The speed wire I am less certain of because i do have my wiring diagram with me. I believe it is A2 on the same connector and may be the green/yellow. I can verify the speed wire tomorrow. (I know it is a2 but cannot recall the color.)
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Old 10-23-2003, 12:32 AM   #5
brunetmj
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Just to clarify the ECU issue a bit. One of those wires (cannot recall which one) was more of a center wire on it's plug. This means a lot of wires off that plug had to be separated in order to tap it. I thought the operation was to fraught with danger to the patient , so I closed it up and went to the gauge cluster.
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Old 10-23-2003, 08:57 PM   #6
brunetmj
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Well so much for my memory. The tach wire on i11 (ten pin connector) is C5 yellow/green. The speed wire is C2 green/blue.
Again this is on back of the gauge panel and is the only ten pin connector. The rest are larger.
If you must go to the ECU then use connectors B134 and B135.
Tach wire is A23 on B134 (green wire) and speed is B27 on on B135.Green/Yellow.
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Old 10-23-2003, 11:46 PM   #7
Silverevo8owner
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Thanks!
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