I thin i'll contribute a bit.

[Einimas]

The main idea:
http://mycomputerninja.com/~jon/www.pgmfi.org/twiki/bin/view/Library/NokiaCableDatalogging.html
My cable's chip's datasheet:
http://www.prolific.com.tw/support/files//IO%20Cable/PL-2303HX/Documents/Datasheet/ds_pl2303HX_v15E.pdf

Honda guys use it with success, i thougt it is wery simmilar to the cable you guys are using, and maibe even the same, i want to try to use it on my dads eudm my95 ej20 sohc legacy. Is it possible?

[Einimas]

I installed this driver and my pc identified it as usb com port adapter.

[b3lha]

Hi, thanks for the info.

It's interesting that phone cables can be used. It could provide a cheaper alternative to the FTDI cable we are using.

The datasheet you posted refers to a 3.3 volt signal. The Subaru ECU expects 5 volts but you might be able to get away with it. The connection information can be found on my website and many others. I guess you've probably already seen it. Give it a try and lets us know how it works out.

I expect your Dad's Legacy to have a JECS OBD1 ECU. Maybe even the same "T8" version that we are looking at in the Subaru section below. Check my post on page 2 of that thread for a list of data logging addresses to try.

Phil.

[Einimas]

In you'r webpage you wrote, that 3.33v TTL converters do not work with subarus. I may be limited with my poor honda.



EDIT:
I found these lines in cable's chip's datasheet:
(2)– SCHMITT In, 5V Tolerant, Input Pad. Level and Driving Capability decided by VDD_325.
(3)– SCHMITT In/CMOS Out, 5V Tolerant, Bi-directional Pad. Level and Driving Capability decided by VDD_325.
(4)– CMOS Out, 3.3V, Output Pad, 4mA Output Driving Capability.
(5)– SCHMITT In/CMOS Out, 5V Tolerant, Bi-directional Pad with internal resistor pulling-up to 3.3V, 4mA Output Driving Capability.
(6)– LVTTL In, 3.3V, Input Pad.
(7)– SCHMITT In/CMOS Out, 5V Tolerant, Bi-directional Pad, 4mA Output Driving Capability.
PL-

I can see that there are lines comming to the #2, #6 to the chip, but i dont see the lines that are under.

Crappy english 

[b3lha]

In you'r webpage you wrote, that 3.33v TTL converters do not work with subarus. I may be limited with my poor honda.

Yeah. Somebody tried it and it didn't work. IIRC they posted about it in the "Memory Dump" thread on www.subaru-svx.net.

EDIT:
I found these lines in cable's chip's datasheet:
(2)– SCHMITT In, 5V Tolerant, Input Pad. Level and Driving Capability decided by VDD_325.
(3)– SCHMITT In/CMOS Out, 5V Tolerant, Bi-directional Pad. Level and Driving Capability decided by VDD_325.
(4)– CMOS Out, 3.3V, Output Pad, 4mA Output Driving Capability.
(5)– SCHMITT In/CMOS Out, 5V Tolerant, Bi-directional Pad with internal resistor pulling-up to 3.3V, 4mA Output Driving Capability.
(6)– LVTTL In, 3.3V, Input Pad.
(7)– SCHMITT In/CMOS Out, 5V Tolerant, Bi-directional Pad, 4mA Output Driving Capability.
PL-

I can see that there are lines comming to the #2, #6 to the chip, but i dont see the lines that are under.

Crappy english 

5v tolerant means that the input connection can accept a 5v signal from the ECU without frying the chip. That is a good thing. 

The potential issue is whether the ECU will recognise the 3.3v signal from this cable. They all have slightly different tolerances. I suggest trying the same RX and TX wires that you use to connect to the Honda and see what happens. Follow the "troubleshooting" procedure on my website using the Hex Com Tool software.

If you can't get it working then just build a 5v cable and use that.

[Einimas]

Thank you. I think everyone has to be a piones at some time of their lives . I'll try it as soon as i have time and a laptop.