Help Diagnostic port wiring

[chrispol3]

Ok had an engine swap everything seems fine 98 legacy gt to 04 wrx 2.0t engine / drivetrain and ecu ... but i cannot access the ecu via the diagnostic port with my tactrix cable.. i'm guessing wither the diag port was not hooked up, anyone have any info on what wires from the ecu go to the diag port on a 04 wrx? or can i just pin directly from the ecu?

Any Help would be great, ideally i would like to direct wire it to the ecu

Thanks

[m3n0ch3]

check this pdf out

STI 2004

http://www.northursalia.com/modifications/misc/wiring/04_STi_ECU.pdf

WRX 2004
http://www.northursalia.com/modifications/misc/wiring/04_DOHC_ECU.pdf

[chrispol3]

Yep i did, so if i

B135-14 is test mode when grounded



but what pins do i jump to the tactrix cable ??

[m3n0ch3]

check the SSM pin...

B134 - 21 if I`m not wrong

[chrispol3]

So...

Test mode connector B134-14
SSM/GST communication B134-21 -> pin 7 k-line
Line End Check B134-10 -> pin 11 flash voltage


B134-20 -> OBD pin 9 is the L-Line

patched this from ecu bench thread http://forums.openecu.org/viewtopic.php ... light=b134

but B134-20 does not seem to be listed in 04 sheet......

B134-14 has to be grounded when? only on flashing?

also there are 6 pins on the tactix cable?

[chrispol3]

Ok i think i got it

Tactix Cable Pin 16 -> +12v
Tactrix Cable Pin 4+5 -> Gnd
Tactrix Cable Pin 7 -> K-Line SSM/GST communication B134-21
Tactrix Cable Pin 11 -> Line End Check B134-10

B135-14 Grounded when flashing

Can anyone confirm is this is the right hookup?

Thanks

[chrispol3]

Yay it works, Holy trouble codes batman .....

[chrispol3]

Now .. for the flash connectors my wiring harness is from a 98 legacy so can i use the flash connectors or do i have to wire from the ecu ? what wires need to be jumped from the ecu??