dx4picco Posted August 9, 2019 Report Share Posted August 9, 2019 Hey guys,dp) I finally got my hands onto a wrx4+ link ecu, to put in a 1998 v4 sti Type R (all stock components aside catless DP). I tried to setup an excel file to see where I am at regarding the wiring. For the harness pinout I based myself on the following pictures: Then I used the Help file of PC link to get the ones of the ECU. I have the following questions (Excel file attached): -why are there aux, aux-inj, aux-ign outputs. what are the technical differences between these? -It looks like the list doesn't include grounds and +5v's, are they the same as stock ecu? (sensor ground, shield ground, ign ground, inj ground, maf ground, tps...) -It seems like that in the pin function list I am missing the crank and cam position sensor, are they present? -the pin function list shows An volt 1 for the map sensor, but nothing is lining up to it, and I can't even find the number on the stock ecu. Any idea on that? -why is there 2 times ignition #1 and #2 (ecu pin 4&5 and 17&18)? is that the same output twice or is it really 4 independent ignition outputs to run full sequential ignition? -what is the "Pressure source switching solenoid valve" of the stock wiring harness? Have a nice day! dx4picco ecu pinout.xlsx Quote Link to comment Share on other sites More sharing options...
dx4picco Posted March 17, 2020 Author Report Share Posted March 17, 2020 I'm coming back to this after some time, IS B136-18 or pin 66 in link manual the map sensor ground? Could the maf ground be used as a ground for the O2 wideband? B136-5 for the + and maf ground B136-7 for the -? pin 62/B136-22 is labeled seld shut off control, is that pin active in the wrx4+ to control the hold power? thank you Quote Link to comment Share on other sites More sharing options...
Adamw Posted March 18, 2020 Report Share Posted March 18, 2020 Pin 66 is just marked as "GND" in the schematic I have. MAP 0V is pin 71 (B136-13) 21 hours ago, dx4picco said: Could the maf ground be used as a ground for the O2 wideband? B136-5 for the + and maf ground B136-7 for the -? Yep that will be fine. 21 hours ago, dx4picco said: pin 62/B136-22 is labeled seld shut off control, is that pin active in the wrx4+ to control the hold power? Pin 62 is a 12V signal out to engage the main relay. In the WRX4 ecu this pin is just joined directly to pin 51 (ignition switch), so the ecu has no interaction - the main relay is controlled directly by the ign switch. Quote Link to comment Share on other sites More sharing options...
dx4picco Posted March 19, 2020 Author Report Share Posted March 19, 2020 I got almost everything sorted. Still on the way to make the v3-4 pluggin work on the 2000 impreza turbo. Only thing that doesn't work is the map sensor. Doesn't seem to have connection to it. I know now that on the V4 pluggin its (+)67 or b136-17 and (-) 71 b136-13 like you said. Tps works so I believe the +5v feed to the map is right too (common with tps). Now onto the car harness (v6) I have MAP (+/signal) on b136-7, that seems right too. I had the hope that map was on the common sensor ground on b136-24, but as it doesn't work, is that really the case ? What is the map ground pin on a v6 impreza ? Edit : ok now it seems to work. Didn't change anything, was maybe a bug. Quote Link to comment Share on other sites More sharing options...
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