ECU, Wiring, Sensors
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By Classiccarsrule85
#156496 Well i spent a better half of two days working on this since i got fed up with there being either auto harnesses or 92 civic harnesses (where the map is on the firewall and the wiring is in the chasis harness...) at my local junk yard and all the 5spd harnesses i needed where cut by idiots.....

Mainly did this so as to use a d series harness on a integra motor and i thought whilst i was working on figureing whats what i decided to go ahead and figure out everything just in case........and since i couldnt find the engine harness diagram in the repair manual i decided to do it myself

(Caution: I bare no responsibility for you screwing up its your fault not mine the harness i used was from a 92 civic 5spd so others may be different but so far i havent found any differentiation besides vtec and of coarse auto......so lets begin shall we)

Wires and plugs are not in order in any way i just did as i pleased lol....
And when i say the wires and their approx position im looking at the female end and the clip side up
And when color/ color comes up that means main color/stripe color

Map Sensor
3 wires spaced left to right
White-Green-Yellow/green

TPS sensor
3 wires spaced left to right
Yellow/White-Red/Blue-Green/White

IACV sensor
2 wires spaced top bottom
Blue/yellow-yellow/black

VSS sensor(speed sensor)
3 wires spaced left to right
Yellow/White-Yellow/blue-Black

Fan switch/engine temp sensor
2 wires spaced top bottom
Black-Green

Thermostat Ground
4 wires connecting into one looped connector
-2 black wires-Red/black- Brown/black

Distributor Plug 1(large plug)
7 wires 1 blank distributed evenly from left to right (from upper left if looking at the plug eonnector side with clip up....)
1-Orange
2-Orange/blue
3-Blue/green
4-Yellow/green
5-White
6-White/blue
7-Blue/yellow
8-blank

Distributor plug 2 (small plug)
2 wires left to right
Black/yellow-Blue

02 Sensor plug
4 wires distributed evenly left to right top to bottom(from upper left)
1-Green/white
2-White
3-Orange/black
4-Yellow/black

Reverse sensor
2 wires left to right
Yellow-Green/black

(unsure of sensors name)
1 wire going to the head near the trans....
Yellow/green

(unsure of sensor name)
2 wires from top to bottom (this goes to the other sensor on the head....)
Red/white-Green/white

Starter wire
1wire female clip
Black/white

Now im going to reverse from where i started working my way to the other side....

Oil temp/psi sensor
1 wire
Yellow/red

Air intake temp sensor
2 wires from top to bottom
Green/white-Red/yellow

Vaccum sensor plug
2 wires from top to bottom
Yellow/black-Red

Alternator to fuse box wire
1 wire
White

Alternator plug
4 wires distributed evenly top bottom left to right (1 and 2 are horizontal, and 3 and 4 are verticle)
1-Blue
2-White
3-Black/yellow
4-White/blue

Fuel injector plugs
8 wires 2 in each plug from left to right with clip side up. a being left b being right....and im going from the farthest away from the harness itself first to the one closest....
1a)Yellow/black
1b)Yellow

2a)Yellow/black
2b)Blue

3a)Yellow/black
3b)Red

4a)Yellow/black
4b)Brown

End of the 1992 Engine plugs

Now i also had at my disposal a 94 si harness from a 5spd so here we go

Vtec solinoid
2 plugs

1wire plug
Green/yellow

2 Wire plug
Blue/black
Black

and at the junkyard i just glanced at the only plug needed for the auto trans (that two tier thing that looks like a dual vtec solinoid oil pressure sensor......

2 wire plug
Green/black
and either Yellow or Yellow/white

Now look onto the next post I made to see the strut tower harness plug breakdown
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By Classiccarsrule85
#156497 Engine harness part 2
i will first describe the plug by wire colors and area and then below the description of that side i will put where said wire goes....also I live in the US so when i say drivers side and passenger side if facing the engine at the front of the car Drivers side right, passenger side left.....

Drivers side tower
3 plugs(1 with no male connector just a blank plate)

No plug(the one with no plug going to it )
8 wires all yellow black

2 wire plug(drivers side)
2 wires from left to right
Black/yellow-Black/white

14 pin plug(drivers side)
14 wires distributed 3/4/4/3
Clip/top
1 2 3
4 5 6 7
8 9 10 11
12 13 14

^not perfect but you get the idea

1-Black/yellow
2-White/blue
3-Red
4-Blue/yellow
5-Yellow/blue
6-Yellow/white
7-Blue
8-Yellow/red
9-Green
10-Black
11-Yellow/green
12-Yellow/black
13-Green/black
14-Yellow

Now to what they go to
no plug harness didnt get into detail here but some go to the injectors

2pin plug
Black/white-Starter wire
Black/yellow-Distributor

14 pin plug
1-Black/yellow-Alternator
2-White/blue-Alternator
3-Red-vaccum sensor
4-Blue/yellow-IACV sensor
5-Yellow/blue-Speed sensor
6-Yellow/white-speed sensor
7-Blue-distributor
8-Yellow/red-oil psi sensor
9-Green-temp/fan switch sensor
10-Black-speed sensor
11-Yellow/green-1 wire unknown sensor from head
12-Yellow/black-vaccum sensor
13-Green/black-Reverse sensor
14-Yellow-Reverse sensor

Passenger side plugs
3 plugs 1 rogue wire

1 wire- White

14 possible pin harness....on the 92 civic with a nonvtec in it is a 9pin plug
on the 93+non vtec without the map sensor on the firewall its a 12 pin plug and on vtec cars where the map is on the top of the throttle body its a 14 pin plug

*=depending on what model your car is and what harness you may not have this wire there

14 wires distributed unevenly 3/4/4/3
Clip/top
1 2 3
4 5 6 7
8 9 10 11
12 13 14

^not perfect but you get the idea
1-White/yellow
2-Orange/black
*3-Green/yellow
*4-Green/white
*5-White
*6-Yellow/red
*7-Blue/black
8-Yellow/green
9-Yellow/white
10-Green/white
11-Red/Blue
12-Red/yellow
13-Red/white
14-Blue

10 possible pin harness (there is one black im thinking its for the automatics)
10 wires distributed unevenly 3/4/3
clip
1 2 3
4 5 6 7
8 9 10
^not perfect but you get the idea
1-Brown/black
2-White
3-Black/red
4-Orange
5-White
6-Orange/black
7-White/blue
8-Blue/green
9-Blue/yellow
10-Blank

4 pin harness
4wires distributed evenly left to right top to bottom
1-Red
2-Brown
3-Yellow
4-Blue

Found out also that some wires have two going into it.... so when you see a sensors name and a / and then another sensors name thats what i meant....

14 pin plug
1-White/yellow-Alternator
2-Orange/black-02 sensor
*3-Green/yellow-Vtec solinoid 1 wire plug
*4-Green/white-Map sensor
*5-White-Map sensor
*6-Yellow/red-map sensor
*7-Blue/black-2wire vtec plug
8-Yellow/green-distributor
9-Yellow/white-TPS sensor
10-Green/white-Air temp sensor/TPS sensor
11-Red/blue-TPS sensor
12-Red/yellow-Air intake temp sensor
13-Red/white-head plug (2 pin plug)
14-Blue-Alternator

10 pin plug
1-Brown/black-Ground on thermostat
2-White-Distributor
3-Black/red-Ground on thermostat
4-Orange-Distributor
5-White-Distributor
6-Orange/blue-Distributor
7-White/blue-Distributor
8-Blue/green-Distributor
9-Blue/yellow-Distributor
10-Blank possibly for auto not sure what color

4 pin plug
1-red-inj 3
2-Brown-inj 4
3-Yellow-inj 1
4-Blue-inj 2

And there you have it one semi-complete engine harness wire set-up....Now so far from the two harnesses all plug wire colors are the same so you should be ok with this list....

Also using this list you can de-pin and re-pin the engine harness....and create a vtec harness or use any harness for your car really....

Enjoy and im open to comments as well.....
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By 93cxhb
#156618 :shock: ....wow thats awsome nice job man. could someone please make this a sticky ..
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By chrono404
#156619 Good Info. :thumb:

I dont have the powers to make this a Sticky, Hopefully someone who does Sticky's This.
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By ohDirka
#156639 very nice write up :thumb:


chrono404 wrote:I dont have the powers to make this a Sticky, Hopefully someone who does Sticky's This.


done :thumb:
By matt j
#157807 thank you so much for this, i deloomed my whole harness and forgot where some of the plugs went, but thanks to you and this post i was able to find where each plug went and everything, again thank you!
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By 92dxeg
#178181 i have a 94 dx harness will this still work
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By Classiccarsrule85
#178189 yes

i noted some of the differences such as unlike yours mine came without the map sensor on top of the throttle body so it wasnt in the harness but i had a ex/si harness on hand that i also referenced from so this will help you
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By 92dxeg
#178190 ok cuz i got a 94 harness but the air intake temp/iacv/knock did not have plugs on them just wires so i took some of a Da integra harness and iam trying to match colors
do u no what colors the knock sensor is
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By 92dxeg
#178218 ok well i thought it is the green plug next to my oil filter and i also have that ruber one with the single black wire i have a 93 b18a1
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By ED3Civic
#239959 The black/red and brown/black thermostat housing wires arent connect to my house there just there.. (i bought the car like this, it was not running) i have a new dizzy in it thinking that was the problem for no spark.. but will these wires cause the motor not to have spark?


thanks,
ED3
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By Classiccarsrule85
#240029 well it is a ground and you need to have all your grounds connected in order for the engine to run properly...
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By Ajax1989
#263859
Classiccarsrule85 wrote:
(unsure of sensors name)
1 wire going to the head near the trans....
Yellow/green

(unsure of sensor name)
2 wires from top to bottom (this goes to the other sensor on the head....)
Red/white-Green/white



the 1st one, controls the thermostat gauge in ur dash

and the 2nd one is the ect
Engine Coolent Temp sensor

and the one on the thermostat housing is the fan switch
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By ej2??
#326740
the 1st one, controls the thermostat gauge in ur dash


mines just broke off in the head, have any clue of what its name is or where i could find one or a aftermarket replacement?