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Old 11-11-2013, 07:14 PM   #1 (permalink)
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Minimalist Toyota Engine Wiring Diagrams

EDIT: TO BE CLEAR, I AM NOT AN ELECTRICAL ENGINEER AND MAY HAVE TAKEN SOME ARTISTIC LIBERTY WITH MY NAMING OF THINGS AND DIAGRAM PICTURES


Feel free to critique and let me know what you think, this information is out there, but kind of scattered about. I tried to draw out some bare bones buggy style wiring diagrams for Toyota Engines, I plan on adding in more later.
edit: just 20r 22r 22re for right now, have 2rz and 3vze diagrams also, would like 5vze, and 1/2uz diagram if you have them

If you have some that you have done, please feel free to copy/paste in here, I will add to this thread as I come across posts that are pretty inclusive.

IMHO, there doesn't need to be things like "cut the blue wire" because wires can change color, as well as pictures of harness' because that doesn't always say much either.

Went ahead and used a push button starter with a single toggle on/off ignition and didn't add in any of the emissions stuff. Obviously more could be added or probably some stuff changed around.

These pictures should be big enough that you can zoom in if you can't read them as they sit.



If you can't read them, let me know and I'll see about darkening them up or something.

edit: POSTED SCANNED/CROPPED PICTURES IN POST #12 WAY MO BETTA

edit 10JAN2018 https://www.pirate4x4.com/forum/toyot...l#post42846626 inserting this link which has the 1985 wiring diagram and some notes regarding same
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Old 11-12-2013, 07:37 AM   #2 (permalink)
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Although I don't have one to add, another good one would be a propane diagram.
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Old 11-12-2013, 08:02 AM   #3 (permalink)
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Quote:
Originally Posted by Mr Stubs View Post
Although I don't have one to add, another good one would be a propane diagram.
Same as 22r, minus "choke heater," and add a lock off leg if running an electric lock off.
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Old 11-12-2013, 11:30 AM   #4 (permalink)
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Nice work Mang! Cheap bastard....$110 for a windshield
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Old 11-12-2013, 01:25 PM   #5 (permalink)
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Wire colors?
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Old 11-12-2013, 01:45 PM   #6 (permalink)
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Quote:
Originally Posted by crash View Post
Wire colors?
Pencil lead gray buddy .....
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Old 11-12-2013, 03:50 PM   #7 (permalink)
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Pencil lead gray buddy .....
Good thing my hair is silver
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Old 11-12-2013, 03:52 PM   #8 (permalink)
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Quote:
Originally Posted by Provience View Post
Green

(IH joke)

I didn't want to include wire colors because those can change from time to time (example the "gray wire mod" thread from the other day where the guy had to use a red/purple or some shit) and this allows some circuits to be bypassed and I didn't need to write in Blue wire turns into Red/Black, it is easy enough to just pull the connector apart and repin it with whatever color wire you want.

If I can figure out an easy way, I'll try and put up the Pin Out for each Plug and make it easier to identify what wires were removed (example, eliminating the Circuit Opening Relay also drops 2 wires from the AFM)
One thing toyota did a good job with is color coding circuit identification.

If you look at many years work of toyota's you can easily know what circuit you are looking at by the color.. Just some food for thought.
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Old 11-13-2013, 09:16 AM   #9 (permalink)
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Quote:
Originally Posted by crash View Post
One thing toyota did a good job with is color coding circuit identification.

If you look at many years work of toyota's you can easily know what circuit you are looking at by the color.. Just some food for thought.
True, I integrated a 1986 harnesses to a 2006 Tundra 4.0 V6, and found many of the colors matched. That's a 20 year spread.

The wiring diagrams are easy to find, so matching colors is very easily done by the end user. Do a few checks with a meter, and don't let any smoke out.
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Old 11-13-2013, 01:18 PM   #10 (permalink)
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Great ideal.
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Old 11-13-2013, 04:30 PM   #11 (permalink)
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You should do these in AutoCAD and export them as .PDF so we can save them
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Old 11-14-2013, 03:03 PM   #12 (permalink)
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better?


Name:  20R wiring JPEG.jpg
Views: 31762
Size:  41.1 KB

Name:  22R wiring JPEG.jpg
Views: 52338
Size:  28.7 KB

Name:  22RE wiring JPEG.jpg
Views: 34251
Size:  48.1 KB

anybody know how to get a .pdf file onto the internet? pirate wont host it as an attachment nor photobucket

much easier to see though when scanned as an adobe pdf file
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Old 11-14-2013, 03:13 PM   #13 (permalink)
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Awesome info..thanks!
Upload them to dropbox and post the download link.
Email them to me and I'll host em if you'd like
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Old 11-14-2013, 03:35 PM   #14 (permalink)
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Try these...

20R
https://db.tt/VJ8R1Yam

22R
https://db.tt/8Xb1D9H6

22RE
https://db.tt/G90JN5NC


Last edited by Rokcrler; 11-14-2013 at 03:50 PM.
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Old 11-14-2013, 03:38 PM   #15 (permalink)
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thanks pimp
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Old 11-14-2013, 03:40 PM   #16 (permalink)
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The least i can do for the nice info
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Old 11-14-2013, 04:38 PM   #17 (permalink)
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Been trying to avoid too much wall of text, let me know if this makes sense. If not, then I will try to draw it out and scan it in. Makes more sense to me on paper anyways

Wiring Colors For the Circuits.

22RE (these are off a '95 so may not be 100% for all years or it may apply to many generations )

ALL PLUGS ARE NUMBERED LEFT TO RIGHT, TOP TO BOTTOM

Ignitor
Wire #1 - Black-bLue to IGT ECU
#2 - Black-Orange to NE ECU
#3 - Black-Red to 12V+
#4 - Black-Yellow to IGF ECU

Distributor
#1 to Igniter is Red
#2 to Igniter is White

Ignition Coil
Coil+ to Igniter is BRown
Coil- to Igniter is Black

Fuel Pump
#1 - bLue to 12V+
#2 - White-Black to EARTH(GND)

Injectors
#1 - Black-Red to 12V+
Injectors 1&3 #2 White-Red to #10 ECU
Injectors 2&4 #2 White to #20 ECU

AFM
#3 BRown-Black to E2 ECU
#4 White-Red to 12V+
#5 Green-Blue to VC ECU
#6 Yellow-bLue to VS ECU
#7 Yellow-Green to THA ECU

TPS
#1 BRown-Black to E2 ECU
#2 Yellow-bLue to IDL ECU
#3 Yellow to VTA ECU
#4 Green-Yellow to VCC ECU

Coolant Sensor
#1 BRown-Black to E2 ECU
#2 Green-bLue to THW ECU

Knock Sensor
#1 Black to KNK ECU

Oxygen Sensor (with heater)
#1 Pink-Green to HT1 ECU
#2 White-Red to 12V+
#3 Black to OX1 ECU
#4 BRown to E1 ECU/GND

Check Engine Light
#1 Black-Orange to 12V+
#2 Violet (purple) to W ECU and W DLC

Data Link Connector
#4 Black to OX
#3 BRown to E1 GND
#6 Violet-White to T ECU
#7 Violet-Green to E2 ECU
#9 Yellow to VF ECU
#17 Violet to DG ECU (4WD A/T only)

Alternator
GND is that one small stud nut
#1 Yellow to Light
#2 Red to IGnition
#3 White to Sense (12V+)
B is for direct to Battery and is White
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Last edited by Provience; 11-14-2013 at 05:01 PM.
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Old 11-14-2013, 04:47 PM   #18 (permalink)
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Let's try out the 20R

Ignition Coil
BRown to 12V+
Black to GND
Blue to Condenser

For Alt Regulator Combo labeled 4X2
B to B to Battery is White
N to N (neutral) is bLue
E to E to GND is Black
F to F (field) is Green
L to Charge Light is Yellow

for Alt Regulator Combo labeled 4X4
B to S is White
F to F is Green
E to E is Black
L to L to Charge Light is Yellow
IG to Ignition 12V+ is Red
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Old 11-14-2013, 04:49 PM   #19 (permalink)
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For the 22R

Alternator
L to Charge Light is Yellow
B to Battery is White
S to 12V+ is White
IG to IGnition is Red

Distributor
#1 to Igniter is Red
#2 to Igniter is White

Ignition Coil
Coil+ to Igniter is BRown
Coil- to Igniter is Black

Igniter
#1 Black-Red to Ignition 12V+
#2 Black OPTIONAL AND NOT LISTED IN ABOVE SCHEMATIC to Tachometer
GND goes to the GND and is right there
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Last edited by Provience; 11-14-2013 at 04:53 PM.
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Old 11-15-2013, 07:50 AM   #20 (permalink)
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subscribed to see what you come up with on the 5vz.

When I did my swap into my 85, I recreated all of the circuits that fed the ecu, but I'm sure there were a few that weren't actually needed. I'm not a motor guy, so I didn't know how far I could strip it down (especially with the evap system). My truck runs perfectly tho, so I did something right.

I know there were some big differences between early and late 5vz, I wonder if they become more similar the more you strip out the un-needed stuff.
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Old 11-16-2013, 06:55 PM   #21 (permalink)
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Thanks! Wiring the ftoy up as we "speak"
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Old 11-17-2013, 12:48 PM   #22 (permalink)
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I've got a 22re coil/igniter on a 22r...how much of this will change?

Are you considering your charge light a voltage tach?
I've got 2 wires coming from coil/igniter (black/red, black)
I got 4wires to alternator (yellow,white red, black ground)
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Old 11-17-2013, 01:58 PM   #23 (permalink)
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Quote:
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I've got a 22re coil/igniter on a 22r...how much of this will change?

Are you considering your charge light a voltage tach?
I've got 2 wires coming from coil/igniter (black/red, black)
I got 4wires to alternator (yellow,white red, black ground)
The coil doesn't matter between the two, both will really work okay ultimately.

The Ignitor is different between the two. On the 22R it relies on just the pickup in the distributor to signal the coil to fire, on the 22RE it requires signal from the ECM so that it can be 'fine tuned' on the timing based on everything else the computer is mapping out. In my opinion, it won't work properly without the ECM and seems like more trouble than worth to try and 'trick' it into acting like the one for the 22r.

I am considering the Charge Light to be just that, it is just a light bulb in the factory dash. I've HEARD (take it for what it is worth) that the resistance provided by the bulb is required to help initiate the charging function. If a Voltmeter would also work in the same function, I have never personally tried as the bulb is simple enough for me. If you would like to try it out and report back that would be sweet If it isn't showing that the system in charging, easy enough to wire in a bulb either in-line or in place of the meter and know for sure if that makes it go.

on the Alternator, Yellow is the Charge Light, Red is to the IGnition, Ground is obviously to ground, and White should be going to the Battery (are those your 4 or is there one more? I was confused by the lack of a comma or hyphen in there ) If you have another one that is Black it should be to Ground also. If that doesn't work post back up and we'll see what we can figure out from there.
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Old 11-17-2013, 04:17 PM   #24 (permalink)
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adding this in for future reference. hopefully getting into school for all of next month so I'd like to get the RZ ones done then and the VZ ones. Should be able to still have access to manuals there

https://www.pirate4x4.com/forum/toyot...ification.html
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Old 11-17-2013, 05:22 PM   #25 (permalink)
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what i came up with. no cold start injector and no IAC
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