Subaru Impreza 2008 OBD/ CAN

OpenECU hardware design documents

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Subaru Impreza 2008 OBD/ CAN

Postby Mad Max » Sun Jan 13, 2008 1:00 pm

Hi. I know that cable/ soft for this car is under development.

But can anybody tell me how to logging data from ECU? Is it possible now?

Problem is that I cand find K/L Lines.
4,5 ground
16 +12
But I don't have any wire at 15 pins!

So I don't know how to connect cable to OBD connector.
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Postby radsdau » Sun Jan 13, 2008 4:35 pm

If there is no KLine, there is no logging with the current hardware. CAN bus only.
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Postby Mad Max » Sun Jan 13, 2008 11:26 pm

you see, there are lot of wires. And k/L lines must be present.
But I don't know were they are placed.
As I remember, I have wires in 3,4,5,6,7,8,14,16 contacts.
(But I'm not sure about 8 and 14).

In any way, I don't have wire in contact 15.
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Postby Jon [in CT] » Mon Jan 14, 2008 10:28 am

radsdau wrote:If there is no KLine, there is no logging with the current hardware. CAN bus only.
2008 Subarus still have the K-Line and can be logged using Enginuity or ecuExplorer.
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Postby Mad Max » Tue Jan 15, 2008 1:05 am

I found that K-line myst be in Pin 10 of OBD conector.
(See attached picture. This is schematic of Legacy 2004.)
I have it in my connector.
Ground (12,13) and +12 (1) they are present to.

But what is the pink wire on pin 6? is it L-line? In my connector pink wire is at pin 3.

By the way: how this F*king SSM protocol is work for data logging?
Is it one way connection or is it two way connection?
Attachments
Legacy ECU.JPG
Legacy ECU.JPG (49.79 KiB) Viewed 6848 times
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Postby Mad Max » Tue Jan 15, 2008 7:19 am

And please help me with next:

As I understand, Subaru K-line have +5 V (Hi level TTL) in normal mode.

When we send data to ECU, OpenPort short K-line to the ground (low level TTL) and ECU recive data in this way. After ECU recognise sent data, it answer and send data with 12 V amplitude signal to OpenPort.
In OpenPort signal divided in 3 times to TTL level. PC recive ECU data and calculate them.
I'm right or not?
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Postby radsdau » Tue Jan 15, 2008 6:50 pm

Mad Max wrote:By the way: how this F*king SSM protocol is work for data logging?
Is it one way connection or is it two way connection?

Only KLine is required for SSM protocol.
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