i've searched for 3 days... still don't know what the hell these wires are for and where they pin at on the ECU.

at first i thought ERG but i'm missing A11 pin but the A25 (present though)

my obd1 swap (SOHC to JDM D15B) had a sensor clip out and no codes. (same one)

right now, i have an OBD1 JDM B18C (JDM p72 ecu) and a wire harness off a 94 del sol S. i would like to wire my knock sensor (to one of those wires) and IAB (ground to chassis and wired to the other wire) to that clip that's not in use. but i have no idea where to extract the one with the ? (yellow/black stripe) & (red solid) in the picture on the ECU (pin#) to place into the knock and IAB spots. thanks~!





Modified by the soL that could at 1:46 PM 3/25/2006

 

According to my 94 Integra manual, yel/blk is ECU A25 & B1, +12V from PGM-FI main relay, and feeds IAB control solenoid valve, IAC valve, and all 4 fuel injectors. Solid red is #2 fuel injector to ECU pin A3, or A20 to evap. purge control solenoid valve.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RaceCity_USA &raquo;</TD></TR><TR><TD CLASS="quote">According to my 94 Integra manual, yel/blk is ECU A25 & B1, +12V from PGM-FI main relay, and feeds IAB control solenoid valve, IAC valve, and all 4 fuel injectors. Solid red is #2 fuel injector to ECU pin A3, or A20 to evap. purge control solenoid valve.</TD></TR></TABLE>

all those need a plug no?

when i had my jdm D15B sohc, i didn't use this plug either. what exactly is it...i'm confused lol. those OR's are scaring me...


2 questions:
1)what did the USDM engines have the JDM ones do not?
2)and which can i remove BELOW?

-A25 OR B1 (yellow/black)
-A3 OR A20 (red)

i'm planning to switch that red wire to D3 for knock and the swtich the yellow/black to A17 for IAB (and ground the other wire)

 

There are 2 solid red wires from the ECU. One is for #2 fuel injector to ECU pin A3, and the other is ECU pin A20 to evap. purge control solenoid valve. I'm not sure what you mean by "plug". All devices have a connector that plugs in.

 

sorry... i mean ECU pins.

and

plugs as in... i have a switch (like a vtec solenoid) that isn't plugged into anything. i think there's something the JDM engines do not have that the USDM requires.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RaceCity_USA &raquo;</TD></TR><TR><TD CLASS="quote">There are 2 solid red wires from the ECU. One is for #2 fuel injector to ECU pin A3, and the other is ECU pin A20 to evap. purge control solenoid valve. I'm not sure what you mean by "plug". All devices have a connector that plugs in.</TD></TR></TABLE>

so i can take out A20 right... im guessing the JDM engines/ecu does not require it no?

can i pull out A25 or B1?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by the soL that could &raquo;</TD></TR><TR><TD CLASS="quote">

so i can take out A20 right... im guessing the JDM engines/ecu does not require it no?

can i pull out A25 or B1?</TD></TR></TABLE>

Sorry, I don't have answers to those questions.

 

i'm pretty sure i can use A20...since i my JDM engine/ecu does not have purge solenoid capabilities.

as for A25 or B1 i'm still confused. are they the same? because on the left shock tower, all the yellow/black wires are tapped into each other.

 

All I can tell you is what's in the 94 Integra service manual, which should very similar to your 94 delsol harness. I don't have any info on your JDM ECU. On a 94 Integra ECU, the yel/blk wire feeds power to both A25 and B1.