RB20 People, Wiring Harness Info Please

[OrangeVirus1]

I know the "mediocre" questions go into that thread for mediocre questions.

this is something I can't really find online ( I have looked ) and will probably be overlooked in that thread.


My wiring harness was cut at one spot, Can someone with an RB20 verify, on their own harness, What connectors go to this spot?

It is pretty easy to recognize, because of it's location.

please! really appreciate it.
please, if you don't own a RB20, of wanna say something like " just buy this harness, or etc etc " just don't bother posting.

http://img252.imageshack.us/img252/9852/2013020418592257.jpg (http://imageshack.us/photo/my-images/252/2013020418592257.jpg/)

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[BoredEE]

http://wiki.r31skylineclub.com/images/9/9b/RB20_ECU_Pinouts.jpg

Get your self an ohm meter and figure out which wires ohm to the connector on the ECU.

I'm betting that the two brown shielded wires are for the MAF and for the O2 sensor. Which if you want to do right you'll need shielded wire to extend or replace the whole wire from the ECU connector. I believe you are missing several connectors. I'm betting the Red/BLK stripe wire is the positive for the coils. The other wires are more than likely to control the coils or apply power to the O2 sensor and MAF.

[OrangeVirus1]

I have the Ignitor, both connectors for it, and entire coil harness, if that makes any difference. I was planning to replace the shielded wire with shielded wire all the way

[baube]

looks like the ones that was cut in mine too

after looking each one with the pin-out, I figured they were all for a/c, auto trans and cruise control related.


can you post all the others connector on your harness?

[OrangeVirus1]

yeah I can do that, I did see the AC wiring cut, probably some of that is the AC wiring, but I think some of it is also the MAF and 02 sensor wiring, because I have no MAF connector (it seems ) and there was nothing connected to the 02 sensor, but yeah I'll post a pic up.

[OrangeVirus1]

http://img607.imageshack.us/img607/6679/cimg0002m.jpg (http://imageshack.us/photo/my-images/607/cimg0002m.jpg/)

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[hobbs]

Did you tape it or did it come like that?

[OrangeVirus1]

I taped it, because I wanted it to be orange, and get rid of all the old crappy tape and insulation crap.

but now I'm really thinking about just buying the WSP harness, 399$ and it is guaranteed start up.

meh. I'd like to use this one though, save the 400 and repair it.

[OrangeVirus1]

Update, I'm going to use it, and save the 400$ to use elsewhere. Found out some of the wires go to the MAF *pending info on which* some of the wires go to the 02 Sensor*pending info on which* and some go to the AC compressor/ac stuff * IDGAF about those*

[s14-rb20det]

http://i896.photobucket.com/albums/ac166/s14-rb20det/55F0628A-A58B-4E48-9F8A-2C33151C4513-1877-000000CC13E7D5E3.jpg

[OrangeVirus1]

Thanks! that doesn't really help me out so much though, because I need wire color + which wire is WHAT like PIN 37 = MAF input / output or w/e stuff like that

I'm searching searching..searching..

also.. The "great, good,noob friendly" RB20 wiring guides.. are freaking CRAP.. I've seen better wiring guides written by monkeys

[109][101]
[110][102]
[111][103]
[112][104]
[113][105]
[114][106]
[115][107]
[116][108]
=======
[ 8 ][ 1 ]
[ 9 ][ 2 ]
[ 10 ][ 3 ]
[ 11 ][ 4 ]
[ 12 ][ 5 ]
[ 13 ][ 6 ]
[ 14 ][ 7 ]
=======


=======
[ 23 ][ 15 ]
[ 24 ][ 16 ]
[ 25 ][ 17 ]
[ 26 ][ 18 ]
[ 27 ][ 19 ]
[ 28 ][ 20 ]
[ 29 ][ 21 ]
[ 30 ][ 22 ]
=======
[ 40 ][ 31 ]
[ 41 ][ 32 ]
[ 42 ][ 33 ]
[ 43 ][ 34 ]
[ 44 ][ 35 ]
[ 45 ][ 36 ]
[ 46 ][ 37 ]
[ 47 ][ 38 ]
[ 48 ][ 39 ]


1 Ign signal (power transistor) Cyl #1
2 Ign signal (power transistor) Cyl #5
3 Ign signal (power transistor) Cyl #3
5 engine. A/T control input signal (bt1)
6 Sub electrical fan relay (engine temp switch)
7 Tacometeter speed signal
9 AC relay (AC cut signal)
10 Ground (ign signal system)
11 Ign signal (power transistor) Cyl #6
12 Ign signal (power transistor) Cyl #2
13 Ign signal (power transistor) Cyl #4
14 engine. a/t control input sigal (bt2)
15 engine. a/t control input sigal (bt3)
16 ECCS relay
18 fuel pump relay
19 Power steering switch
20 Ground (ignition signal system)
21(RX) Receive (control unit data reception)
22 (TX) Transmit (data sent from control unit)
23 Detonation sensor 1 (cyl 1-3)
24 Detonation sensor 2 (cyl 4-6)
26 Air flow meter ground
27 Air flow meter intake air quantity signal
28 Engine temp sensor
29 Exhaust gas sensor
30 Sensor ground (throttle sen, ENG temp)
31 clock (synchronization signal)
32 Monitor and check lamp (red)
38 Throttle opening output
41 Crank angle sensor (120degree signal)
42 Crank angle sensor (1 degree signal)
43 Ignition switch START signal
44 Neutral switch
45 Ignition switch (IGN)
46 AC switch
47 (CHK) Check (diagnosis activation)
48 Throttle sensor power supply
49 Control unit power supply
50 Ground (control unit)
51 Crank angle sensor (120 degree signal)
52 Crank angle sensor (1 degree signal)
53 Vehicle speed sensor
54 Throttle valve switch (idle connection pt)
56 Throttle sensor output signal
57 Throttle valve switch power supply
58 Battery power supply
59 Control unit power supply
60 Ground (control unit)
101 Injector #1
103 Injector #3
104 Fuel pump terminal voltage control output
105 Injector #2 107 Injector ground
108 Injector ground
109 Injector power supply
110 Injector #5
112 Injector #4
114 Injector #6
115 exhaust gas sensor heater ground
116 injector ground

[baube]

1 Ign signal (power transistor) Cyl #1 blue/orange
2 Ign signal (power transistor) Cyl #5 blue
3 Ign signal (power transistor) Cyl #3 blue/rouge
4 aac green #
5 engine. A/T control input signal (bt1) pink #
6 Sub electrical fan relay (engine temp switch)
7 Tacometeter speed signal yellow/red
9 AC relay (AC cut signal) pale green
10 Ground (ign signal system) black
11 Ign signal (power transistor) Cyl #6 blue/white
12 Ign signal (power transistor) Cyl #2 blue/black
13 Ign signal (power transistor) Cyl #4 blue/yellow
14 engine. a/t control input sigal (bt2) purple #
15 engine. a/t control input sigal (bt3) brown #
16 ECCS relay orange #
17 n/c yellow/black
18 fuel pump relay black/pink
19 Power steering switch pale blue #
20 Ground (ignition signal system) black
21 (RX) Receive (control unit data reception)
22 (TX) Transmit (data sent from control unit)
23 Detonation sensor 1 (cyl 1-3) yellow/orange (thick)
24 Detonation sensor 2 (cyl 4-6) yellow/beige (thick)
26 Air flow meter ground white (thick)
27 Air flow meter intake air quantity signal black (thick)
28 Engine temp sensor yellow/green
29 Exhaust gas sensor white(thick)
30 Sensor ground (throttle sen, ENG temp) black
31 clock (synchronization signal)
32 Monitor and check lamp (red) orange/black #
33 n/c yellow
38 Throttle opening output white (thick)
41 Crank angle sensor (120degree signal) green/black #
42 Crank angle sensor (1 degree signal) green/yellow
43 Ignition switch START signal black/pale green
44 Neutral switch green/pink #
45 Ignition switch (IGN) black/red
46 AC switch pale green/red
47 (CHK) Check (diagnosis activation) yellow/red
48 Throttle sensor power supply yellow/pink
49 Control unit power supply white #
50 Ground (control unit) black
51 Crank angle sensor (120 degree signal) green/black #
52 Crank angle sensor (1 degree signal) green/yellow #
53 Vehicle speed sensor yellow/green
54 Throttle valve switch (idle connection pt) pale green/red #
56 Throttle sensor output signal yellow/red
57 Throttle valve switch power supply green/pink
58 Battery power supply white/black
59 Control unit power supply white #
60 Ground (control unit) black #
101 Injector #1 white #
103 Injector #3 white/red #
104 Fuel pump terminal voltage control output orange #
105 Injector #2 white/green #
107 Injector ground black # (thick)
108 Injector ground black
109 Injector power supply white/black # (tchick)
110 Injector #5 yellow #
112 Injector #4 white/black #
114 Injector #6 white/blue #
115 exhaust gas sensor heater ground brown (thick)
116 injector ground black #


# are dotted wires

[s14-rb20det]

Bro I have rb20det 2serie I don't have pin 37 this is the only tin I found for de pin 37 on the RB20 http://i896.photobucket.com/albums/ac166/s14-rb20det/FD876DE1-EEAF-4340-A9BF-CE2407BDCCD8-2491-0000011AD8EB7EFA.jpghttp://i896.photobucket.com/albums/ac166/s14-rb20det/943A19D6-EC37-4A55-835A-25743AD2702E-2491-0000011B8AB606E9.jpg

[OrangeVirus1]

no no I was just using pin 37 as an example.. not that there actually is a pin 37 or that it does anything

[s14-rb20det]

no no I was just using pin 37 as an example.. not that there actually is a pin 37 or that it does anything

Sorry bro What kind of car did you have? S14 , s13? Remember you have to connect the wires inside the car part off the wires belong to the ecu Memory Ignition and check engine light etc plug F4

[OrangeVirus1]

92 S13 DOHC automatic

which connectors / plugs exactly?

[s14-rb20det]

92 S13 DOHC automatic

which connectors / plugs exactly?
RB20DET Wiring Guide For Dummies (http://www.nicoclub.com/archives/rb20det-wiring-guide-for-dummies.html)
Hope this guide help you.

[OrangeVirus1]

You said you have a RB20 right? can you please take a pic of your harness, where mine is cut, and show me what connectors run on that harness part?

It's right there near where the Firewall gromet thing is (look in the pics) it would really help me alot man please!

[OrangeVirus1]

OK! so I have been looking through ALL the of the available diagrams.. and my harness does not fit to any of them! I am confused as hell. the diagrams, pics.. nothing is matching up!

[s14-rb20det]

OK! so I have been looking through ALL the of the available diagrams.. and my harness does not fit to any of them! I am confused as hell. the diagrams, pics.. nothing is matching up!
http://i896.photobucket.com/albums/ac166/s14-rb20det/C7545874-45AE-4346-AE26-6B0D1E5E7610-3196-0000016D66C6E8D5.jpg maf sensor wire http://i896.photobucket.com/albums/ac166/s14-rb20det/CD527513-1C33-4981-9EF4-3A6BC102D890-3196-0000017179EDB038.jpg the ? in the pic is your maf plug ,This is the part you don't have

[OrangeVirus1]

That is weird, why would the RB20DET have a resistor pack, the injectors are High impedance??

I'm going to be Volt-metering these wires to the ecu and figure out what is what.

I do know I am missing, at bare minimum, the MAF and 02 sensor clips

[s14-rb20det]

That is weird, why would the RB20DET have a resistor pack, the injectors are High impedance??

I'm going to be Volt-metering these wires to the ecu and figure out what is what.

I do know I am missing, at bare minimum, the MAF and 02 sensor clips

Resistor is not for the injectors, Rb20 runs std high impedance resistors, the resistor he was inquiring about is tied into the skyline's variable voltage fuel pump regulator. You not need

[OrangeVirus1]

ok so far I have successfully Found the :
Ground for 02 sensor, 02 sensor signal wire

and 3 wires that do not go to any ECU pin at all ??

about 15 more wires to go lol

[OrangeVirus1]

OK so far I have found ( from those cut wires )
:
airflow signal
Airflow sensor Ground
powersteering switch
Crank angle sensor ground
Crank angle sensor/ECCS relay
Tachometer speed signal
Nuetral switch
02 sensor ground
02 sensor switch
Ignition switch

I have about 6-7 wires that didn't go to any pin on the ECU, BUT I will recheck my wiring and check it again

[baube]

there's probably 12v and gnd for the maf/cas and o2 sensor in the wires you have left

[OrangeVirus1]

I actually found out some of the wires go to the large rectangular connectors NEAR the ecu connectors, but don't go to the ecu

[s14-rb20det]

I actually found out some of the wires go to the large rectangular connectors NEAR the ecu connectors, but don't go to the ecu

F4 connector

[OrangeVirus1]

Now All I need to figure out is wiring it into my S13... the guides online kinda suck.

kinda hard to find the "brown connector" I mean there are like 10 brown connectors

[baube]

brown connector... in your chassis?

should be near the grey one. juste between the headlight and the fusebox


I used highfive's wiring guide for my swap

[OrangeVirus1]

That guide that you posted, I don't have all of the connectors shown, and confused on others

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[OrangeVirus1]

did you need to remove your dash and plug the white connectos on the RB20 harness to stuff under the dash??

[baube]

I can't see the 1st pic at my job :/

2nd : yes, chassis
3rd : on your harness close to the green relays. there's 2 plugs that looks the same. one is for the consult port, the other for the dash plug. you can sort them out with the wire color

I had to cut the male part of that plug off the ka harness to fit under dash



you don't need to remove your dash. but it is not a nice place to work... at least remove the glovebox to make some room. the dash plug is up there in the corner

[OrangeVirus1]

OK I have a KA24DE so this is my dash plug. I just need to splice the wiring into this one instead of that *white* dash plug in the Picture, since that is for a KA24E
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[OrangeVirus1]

What are the Two little sensors on the RB20 tranny for? I can't seem to find any PINS that the green wires on the connectors go to. they were also cut. Are they important?

and the KA speed sensor...... how do I wire that up.