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Engine Tech Technical discussion related to all relevant engines such as KA, SR, RB, CA, 2JZ , L24/26/28, VG, VQ, and LSx series.


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Old 08-25-2011, 06:00 PM   #61
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gotcha. i think ive got almost every pin back in the ecu, except on the 02 sensor my wires are brown/yellow, brown, white. so i dont know which one is the ground and which one to connect to switched power. and then on the massive bit of wires that grounds on the intake manifold, and the wires for the cam angle sensor and tps and that other one in the bunch of 3, its a giant mess and i have several ground wires i cant identify what they are. any suggestions?
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Old 08-26-2011, 03:00 PM   #62
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very good coverage on the wiring...
although i did this the exact same way and on the s13
chassis i found that matching all the wire colors is not always good since the s13 r old
i ended up rewiring the brown and grey plug to a relay....
this will eradicate any linear issues with voltage to ecu or sensors
since i see alot of ppl with bad idle or not running correctly due to voltage issues
just trying to help
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Old 08-27-2011, 11:03 AM   #63
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I just re pinned my ecu, fairly certain i put most of it in right. my engine turns over, but doesnt start. what should i be checking first?
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Old 08-27-2011, 05:16 PM   #64
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I'd start with fuel pump or injector voltage. Then maybe ECU relay and visual confirmation of spark
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Old 01-25-2012, 01:13 AM   #65
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This should be a productive bump if my schematic is complete and actually works, I'm hoping a couple of the wiring gurus can confirm this. I'm very new to wiring so i may be very far off, but I took a shot at finishing my engine harness. Here is where I'm at. Now on the alternator I have nothing coming to terminal (L) at the regulator plug. This wire comes from the charge warning lamp, which receives power from the stock fuse panel and ground on the alternator if I'm not mistaken. Anything standing out that looks incorrect here?

This is for an s13 sr20 into and s13 using a custom switch panel. I have taken the 180sx schematic and translated everything to english. So this is the correct ecu pin out as well. Not just s13 sr20 "mocked up" on the english s14 diagram, so ghetto...



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Old 01-25-2012, 01:22 AM   #66
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^^^^ Looks good man, thanks for the helpful resource!
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Old 01-25-2012, 10:04 AM   #67
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I'm bumping this too see if I can get some input on the schematic I made in my last post. I'm tryin to keep the knowledge rolling in, but i need to know if I have a good grasp on this situation, you know what I mean.
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Old 01-25-2012, 01:07 PM   #68
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Is there a reason you're switching ground for everything?

Is this a track car or a 'street' car?

What are you using for a fusebox?
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Old 01-25-2012, 03:20 PM   #69
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Quote:
Originally Posted by GSXRJJordan View Post
Is there a reason you're switching ground for everything?

Is this a track car or a 'street' car?

What are you using for a fusebox?
No reason why except my inexperience with any form of wiring. Before this week, I did not even know how a relay worked. I'm expecting to get some advise on how i can better it, since everything was basically learned in the past week really...

This will be on a track car that I have to drive to the track, for now. I've already made a harness to cover turning on the headlights, tail lights, brake lights, and side markers. All i got to do is knock out this diagram, and then I can get started on it.

I have not decided on anything parts wise yet, as I don't know exactly what ill be needing. If you have suggestions for quality parts or stores/vendors to use for the fuse/relay panel, I would greatly appreciate it.

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Old 01-25-2012, 03:26 PM   #70
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On track cars, reliability is key, and the less components, the better (as long as everything is working within specs).

I'd go down to a single ignition relay that handles ignition signal to any other relays, as well as ECU/engine power. For a SR/RB/KA/etc 30A is plenty. For a LSx, 30A is not really enough, but works for most people.

No need for a starter relay, our starters only pull 10A or so inrush, and less than an amp maintained while cranking. I don't typically even use a separate starter fuse, unless I have a lot of other stuff on a maintained/constant 12v circuit, I just pull starter solenoid power from the ECU/engine ignition circuit since the engine pulls minimal current while cranking.

Typically I switch +12V instead of ground when using manual switches, and switch low (ground) when using ECU/standalone logic.

We can retail the components we use for most everything if people want to build stuff themselves, just send me a message with what you're looking for and I'll shoot you links to our website, or pics/pricing for stuff that's not on the site (still under construction).
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Old 04-04-2012, 10:15 PM   #71
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Waaaaaaahhhh! What happened?! :OO I'm doing my full wire tuck right now and this was my reference but OP erased it
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Old 04-04-2012, 10:20 PM   #72
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yea wtf was the erase for yesterday?
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Old 04-04-2012, 11:56 PM   #73
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Anyone happen to have taken a print screen of it? Or a word document? I really need it =\. I'd be more than thankful if you do.
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Old 04-11-2012, 10:42 AM   #74
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why did you remove this??????? i was just going to use it!
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Old 04-14-2012, 09:25 PM   #75
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Annyyoonnee??
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Old 05-31-2012, 09:04 AM   #76
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i need this too D=
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Old 06-12-2012, 09:08 AM   #77
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Anyone ever find the original info or get an answer why it was taken down?
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Old 06-13-2012, 01:59 PM   #78
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Anyone ever find the original info or get an answer why it was taken down?

^^^^^^ this ^^^^^^
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Old 07-06-2012, 04:15 PM   #79
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why did you delete the wiring diagram?
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Old 08-10-2012, 11:25 AM   #80
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Quote:
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why did you delete the wiring diagram?
yeh i came back to use as a resource and its gone
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Old 08-11-2012, 12:52 PM   #81
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s14 into s13 (american 240sx) body
Quote:
Originally Posted by DataXUnknown View Post
A lot of people need help with the s14 SR into S13 chassis I've noticed recently, some shops can't even get it right. This is definitely a good writeup though, I will need this come May 2010.
Dont even worry about rewiring anything.. just buy this and you'll be good:

S14 SR20DET to S13 240sx Wiring Harness | Wiring Specialties
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Old 08-20-2012, 09:14 PM   #82
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Dash Connector, 15-pin white plug next to the ECU
Black - ground for CONSULT, not needed
Green/White - Clock (CLK) synchronization pin for CONSULT, not needed
Green - Transmit (TX) pin for CONSULT, not needed
Red/White - Fuel Pressure Control Module, not needed
Blue/Black - Thermal Transmitter for OEM coolant temp gauge, not needed
Yellow/Red - Tach signal for OEM tach, not needed
Green/Red - Clock signal for CONSULT, not needed
Orange/Black - exhaust temp warning lamp, not needed
Green/Black - Receive (RX) pin for CONSULT, not needed
Blue/Green - Thermistor Control Amplifier, not needed
Orange - Start Signal, connect to start signal from ignition switch
Blue/White - Intake Air Temperature Sensor, not needed
Yellow/Green - Vehicle Speed Sensor (VSS) signal from speedometer, not needed

ECU plug:

Large 64-pin connector:
1 - Coil Pack 1 Output (Via power transistor Unit) - Red White, connect to pin 1 of ignitor chip
2 - Coil Pack 2 Output (Via power transistor Unit) - Red Yellow, connect to pin 2 of ignitor chip
3 - Tachometer signal output - Yellow Red, not needed
4 - ECCS Relay - Red Black, connect to ground pin of ECCS relay
5 - Ignition Pulse Monitor (IT monitor, For Trip Comp ?), not needed
6 - Ignition Signal Ground - Black, connect to ground
7 - RX data (Signal from Nissan Consult hand terminal) -Green Black, not needed
8 - Coil Pack 3 Output (Via power transistor Unit) - Red White, connect to pin 4 of ignitor chip
9 - Coil Pack 4 Output (Via power transistor Unit) - Red White, connect to pin 5 of ignitor chip
10 -
11 -
12 - A/T autotrans gear select - Pink Black, not needed
13 - Ignition Signal Ground - Black, connect to ground
14 - CLK clock (timing signal) - Green White, not needed
15 - TX data (signal to Nissan Consult hand terminal) - Green, not needed
16 - MAFS signal input ( Mass Air Flow Sensor ) - White, connect to signal pin of MAFS
17 - MAFS ground - Black, connect to ground pin of MAFS
18 - Water Temp Sensor input - Blue Brown, connect to positive terminal of 2-pin coolant temperature sensor
19 - Oxygen Sensor input (O2) - White, connect to middle signal pin of O2 sensor
20 - TPS input (throttle postion sensor) - White, connect to signal pin of TPS
21 - Sensor ground - Black, connect to ground
22 - CAS 180deg signal (Crank angle sensor) - White, connect to pin 1 of CAS
23 - CLK for CONSULT - Green Red, not needed
24 - Monitor check Lamp (red) (fault code lamp output), not needed
25 - Exhaust over temp warning lamp output - Orange, not needed
26 - Exhaust temp sensor (Behind the Cat) - Blue Yellow, not needed
27 - Detonation sensorinput (knock sensor) - White, connect to knock sensor
28 - TPS for A/T (kick down switch), not needed
29 - Sensor ground - Black, connect to ground
30 - CAS 180deg signal (crank angle sensor) - White, connect to pin 1 of CAS
31 - CAS 1deg signal (crank angle sensor) - Black, connect to pin 2 of CAS
32 - Speed sensor input - Yellow Green, not needed
33 -
34 - Start signal (from ignition switch) - Orange, connect to start signal from ignition switch
35 - A/T neutral switch input - Green Orange, not needed
36 - IGN (ignition ON, from ignition switch) - Black Red, connect to switched ignition power
37 - TPS power output (power to throttle position sensor) - Light Green Red, connect to pin 3 of TPS
38 - ECCS power - Black White, connect to power output pin of ECCS relay
39 - ECCS ground - Black, connect to ground
40 - CAS 1 deg signal (crank angle sensor) - Red Black, connect to pin 2 of CAS
41 - A/C on input (Air Con ON from A/C panel) - Blue Green, not needed
42 - A/T signal DT1 (auto trans gear select), not needed
43 - Power steering switch (speed proportional control output) - Purple White, not needed
44 - A/T signal DT1 (auto trans gear select), not needed
45 - Ambient air temp sensor input - Blue White, not needed
46 - ECCS backup power - Red, connect to constant power
47 - ECCS power - Black White, connect to power output pin of ECCS relay
48 - ECCS ground - Black, connect to ground
101 - Injector No. 1 drive output - White Black, connect to pin 2 of #1 injector
102 - EAI control solenoid output (egr valve control) - Orange Black, not needed
103 - Injector No.3 drive output - Green Black, connect to pin 2 of #3 injector
104 - Fuel pump relay output - Black/Pink, connect to ground pin of fuel pump relay
105 - Fuel pressure control module - Red White, not needed
106 - A/C on output (Air conditioner on relay signal) - Green Black, not needed
107 - Injector ground - Black, connect to ground
108 - Injector ground - Black, connect to ground
109 - Reverse electrical flow return circuit (alternator fail input) - Red, connect to constant power
110 - Injector No. 2 drive output - Yellow Black, connect to pin 2 of #2 injector
111 - Turbo boost pressure control solenoid (over boost cut ?) - Orange Black, not needed
112 - Injector No. 4 drive output - Blue Black, connect to pin 2 of #4 injector
113 - AAC valve control (Auxiliary Air Control, Idle speed control) - Light Blue, connect to pin 3 of AAC/FICD subharness
114 -
115 -
116 - Injector ground - Black, connect to ground

O2 Sensor Plug, connect to O2 sensor
1 - Brown, Power for heating element, connect to switched power
2 - White, Signal, connect to pin 19 of ECU and the shielded wire to ground
3 - Black , Ground, connect to ground

Coil pack harness - 5 pins, 2 rows x 3 pins per row, 1 pin blank, grey, connect to coil pack subharness
Blue/Red - coil pack power, connect to switched power
Red/Green - #4 coil signal, connect to pin A of ignitor chip
Red - #3 coil signal, connect to pin B of ignitor chip
Red/White - #2 coil signal, connect to pin C of ignitor chip
Red/Blue - #1 coil signal, connect to pin D of ignitor chip

Ground Terminals - connect to suitable chassis grounds

Injector #1, connect to #1 injector
1 - Red, power, connect to switched power
2 - White/Black, #1 injector signal, connect to pin 101 of ECU

Injector #2, connect to #2 injector
1 - Red, power, connect to switched power
2 - Yellow/Black, #2 injector signal, connect to pin 110 of ECU

Injector #3, connect to #3 injector
1 - Red, power, connect to switched power
2 - Green/Black, #3 injector signal, connect to pin 103 of ECU

Injector #4, connect to #4 injector
1 - Red, power, connect to switched power
2 - Blue/Black, #4 injector signal, connect to pin 112 of ECU

AAC valve and FICD - 4 pins, 2 pins per row X 2 rows, connect to the idle control system subharness, the FICD pins are for the AC and are not needed
1 - Blue/Red, FICD ground, goes to the Small Grey Plug, not needed
2 - Blue/Green, FICD power from AC relay, from the Small Grey Plug, not needed
3 - Sky Blue, AAC valve ground, connect to pin 113 of ECU
4 - Black/Yellow, AAC valve power, connect to switched power at the Big Grey Plug

Detonation Sensor - 2 pin, grey, connect to the knock sensor
1 - White, knock sensor signal, connect to pin 27 of ECU
2 - Black, ground, connect to ground

Coolant Temp Connector - connect to coolant temp subharness
Blue/Orange - sensor signal for coolant temp, pin 18 of ECU
Black - sensor ground, connect to ground
Blue/Black - thermal transmitter, not needed

Coolant Temperature Sensor - connect to coolant temp sensor
Blue/Orange - sensor signal for coolant temp, pin 18 of ECU
Black - sensor ground, connect to ground

Thermal Transmitter - not needed
Red - thermal transmitter, not needed

Throttle Position Sensor - connect to TPS
1 - Light Green/Red, TPS power, connect to pin 37 of ECU
2 - White, TPS signal, connect to pin 20 of ECU
3 - Black, sensor ground, connect to ground

Cam Angle Sensor - connect to CAS but DO NOT CONNECT TO IGNITOR CHIP BY ACCIDENT. These connectors are the same and will interchange if not careful.
1 - Thick White, CAS 180 degree signal, connect to pins 22, 30 and ground
2 - Thick Black, CAS 1 degree signal, connect to pins 31, 40 and ground
3 - Black/White, CAS power, connect to switched power
4 - Black, ground, connect to ground

Ignitor chip - connect to ignitor chip
1 - Red/White, #1 coil signal, connect to pin 1 of ECU
2 - Red/Yellow, #2 coil signal, connect to pin 2 of ECU
3 - Black, ground, connect to ground
4 - Red/Green, #3 coil signal, connect to pin 8 of ECU
5 - Red/Blue, #4 coil signal, connect to pin 9 of ECU
A - Red/Green - #4 coil signal, connect to coil pack subharness
B - Red - #3 coil signal, connect to coil pack subharness
C - Red/White - #2 coil signal, connect to coil pack subharness
D - Red/Blue - #1 coil signal, connect to coil pack subharness

Turbo Boost Pressure Solenoid, 2-pin, black plug, not needed
1 - Brown, power, connected to Brown Plug, not needed
2 - Orange/Black, solenoid activation signal controlled by pin 111 of ECU, not needed

EAI EGR, 2 pin, not needed
1 - Orange/Blue, activation signal controlled by pin 102 of ECU, not needed
2 - Brown, switched power, connected to Brown Plug, not needed

Power Steering Switch, 2 pin, black, not needed
Purple/White - switch power controlled by pin 43 of ECU, not needed
Black - ground, not needed

AC compressor, 1 pin, white, not needed
Blue/Green - power from the AC relay, not needed

MAFS, 4 pin, 1 pin blank, black
1 - White, MAF signal, connect to pin 16 of ECU
2 - Black, MAF ground, connect to pin 17 of ECU and ground
3 - Unknown colour, power, connect to switched power

Intake Air Temperature Sensor, 2 pin, black, not needed
Blue/White - Intake Air Temp Sensor connected to dash plug, not needed
Black - ground, not needed

#1 Coil Check Connector, 1 pin, grey cylindrical, not needed
Red - #1 coil signal connected to check resistor, not needed

Tach Check connector, 1 pin, grey cylindrical, not needed
Yellow/Red - tach signal on pin 3 of ECU, not needed

#1 Coil Check Connector Resistor, 2 pin, brown plug, not needed
Red/Blue - #1 coil signal from ignitor chip, not needed
Red - check connector, not needed

Brown Plug, 8 pin, 3 pins empty, cut and rewire as necessary
Red/Black - ECU relay ground pin controlled by pin 4 of ECU, connect to ground pin of ECU relay
Brown - Power source for all sensors, connect to switched power
Green/Yellow - AC relay, not needed
Black/Pink - fuel pump relay ground pin controlled by pin 104 of ECU, connect to ground pin of fuel pump relay
Green/Orange - park/neutral position to pin 35, not needed

Small Grey Plug, 6 pin, 2 pins empty, not needed
Black - ground, not needed
Blue/Yellow - exhaust temp sensor signal to pin 26 of ECU, not needed
Blue/Green - AC power, not needed
Blue/Red - FICD ground, not needed

Big Grey Plug, 8 pin, 2 pins empty, cut off and rewire as needed
Blue/Red - coil pack power, connect to switched power
Black/Red - ingition power, connect to switched power
Blue/Yellow - AAC valve power, connect to switched power
Black/White - ECU power to pin 47 and 38 of ECU, connect to switched power
Blue/Green - power from the AC relay, power goes to the AC compressor and the FICD, not needed
Red - ECU Backup power to pins 46 and 109 of ECU, connect to constant power
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Old 08-20-2012, 09:15 PM   #83
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i saved it last year
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Old 10-30-2012, 10:53 PM   #84
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Thanks dude....^^^^needed this to go thru my harness and find my fuel pump problem..
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Old 10-31-2012, 10:38 AM   #85
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>>>>>>>>>^^^^^^^^gone
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