How to Wire a JZA70 Harness into a Ma70 Wiring Config.

[92TealSupra]

So far I have spent over 20 hours configuring this setup. I want to make sure I am finding out what every wire is. There are a ton of wires that will never be used in this setup. The JZA70 has a lot more things that work. An example is the exhaust temp warning light.

Please note that you can't just extend the wires on the JZA70 hanress and it will fit your car. Wires from different plugs are on the wrong plugs and will not work on our cars. This is the reason for this configuring.

Please remember that the JDM Supra's do not have a neutral start switch. So that is one thing that will not be on the B1 Plug at all. There is a Neutral start wire but it goes to the starter of course because it’s not on the clutch pedal. If you splice in a switch for the starter solenoid wires you can create the clutch switch circuit.

Okay Plugs and names of units.

B1 Plug is the square Plug
M1 is the Dark Gray plug
B2 is the White Plug that looks like the M1
B3 light gray
B4 is dark gray with two wires
The Fuse box Plug is a huge 12 pin square plug near the igniter
Resistor is the small resistor in the engine bay that is bolted to the wheel well on our cars


So far I have got what all the plugs run to. From here you should be able to match up the wires from your car. I will be adding to this. So far I have just been able to get what every wire color is and let you know what is does.

JZA70 Harness
B1 Plug

Huge Black/Blue ----------Starter Solenoid
Medium Black----------Igniter
Gray --------Goes to Plug B3 and also ECU ( On ECU Pin it is IGSW Ignition switch AM2 )
White/Blue ------Goes to Plug B3
Green--------- Goes to ECU ( On ECU This Pin is FC- To circuit Opening Relay )
Black/Yellow --------VSV On Heater Control Valve
Small Black/Red--------- Check Connector ( Diagnostic Port ) Pin Fp
Medium Black/Red------ Idle Air Control
White/Red -----------Progressive Power Steering
White/Green------ Progressive Power Steering
Blue/Red------------- Goes to ECU ( On ECU This Pin is A/C Control )
Yellow ------------- Goes to ECU ( On ECU this Pin is Fuel Pump )












M1
Green/Black------- Check Connector ( CCo) ( To ECU Exhaust Temp Sensor )
Brown----- Grounds---- Check Connector ( E1 ) ---- Resistor Ground
Gray/Green------ Check Connector ( W )--- (To ECU Check Engine Light )
Yellow/Blue---- ECU—EGW Exhaust Temp Light
Yellow/Black---- Oil Pressure Sensor for Gauge
Red/Black---- Reverse Lights to Transmission
Yellow/Red----- To B2 Plug
Brown----- Grounds---- Check Connector ( E1 ) ---- Resistor Ground
Yellow----- Reverse Lights to Transmission--- VSV Water Control Valve
Green/White--- To ECU STP. Stop Signal
Yellow/Green--- Water Temp Gauge on Cluster
Pink---- To ECU SPD Speed Sensor
Black/Blue------ Starter Solenoid And Neutral Start Switch A/T
Black---- Igniter










B2
Yellow/Red----------- Goes to M1
Blue/White ----------To B3
Red/Black----------- Goes to ABS plug
Red/Yellow----------- To ECU Signal ELS ( Taillight Fuse )
Black--- -------To Check Connector ( 1G ) Also goes to Plug M1 and Igniter
Red/White--------- ----ECU Signal( L3 )
Red----------- To ECU Signal ( L2 )
Blue--------- T.C Signal on the Check Connector
Medium Yellow-------- To oil level Sensor
Medium Black--------- To ABS Plug
Yellow--------------- To ABS Plug
Purple----- Check connector Signal ( TS )
Black------- To ECU Signal ( l1 )
Brown--------- Check connector ( AB )











B3
Gray------ To M1---- To ECU IGSW Igniter switch AM2
Yellow/Blue----- Hydro Fan Solenoid plug on Water pump
Yellow/Red------ Hydro Fan Solenoid plug on Water pump
White/Black---- To Igniter--- To ECU ( E01 Ground )—Ground on motor
Yellow Blue--- To ECU (IDL) Idle control TPS?
Black---- Igniter --- Check connector ( 1G )
White/Blue--- To B1
Blue/White---- To B2
Teal-- To check connector (OPT) To Fuse box plug, temp sensor in radiator
Black/Red----- To Fuse Box plug--- Temp switch in Radiator

B4
Brown----- Ground for Ecu plugs 1,2,3,4
Blue/Black----- To Map sensor plug---- To ECU—VC--- Vac Sensor

 

[Evilempire1.3JZ-GTE]

Please remember that the JDM Supra's do not have a neutral start switch. So that is one thing that will not be on the B1 Plug at all. There is a Neutral start wire but it goes to the starter of course because it’s not on the clutch pedal. If you splice in a switch for the starter solenoid wires you can create the clutch switch circuit.

There is more to that then what meets the untrained eye.

You have to remember if your doing this swap conversion on an auto car you have to merge the circuit that the automatic selector switch joins since there is no selector switch in the 1JZ because they are 99% manuel for the supra you have to splice them together on the body side of the body connectors.

 

[92TealSupra]

Oh I am not finished yet. I just got what every wire runs too. I still have to find out what that pigtail on the jza70 ecu is for and how many wires and what colors.

 

[djblastsupratuner]

You figure any of this out more? This is really helpful! All i need is 7mge wiring colors and ill be good to go with my 1jz swap!

 

[Pernilongo]

There is guide already that has all the wire colours and plugs and tells what to switch and what to change. why do it again? does this look like smth you are trying to do?

 

[92TealSupra]

There is guide already that has all the wire colours and plugs and tells what to switch and what to change. why do it again? does this look like smth you are trying to do?

Show me the guide

This is not a Soarer harness..

 

[Flateric]

There is guide already that has all the wire colours and plugs and tells what to switch and what to change. why do it again? does this look like smth you are trying to do?

I would also love to see this guide even if it's not for a soarer harness AND if it's for a soarer as well.

 

[Pernilongo]

why did Soarer harness came up?

 

[92TealSupra]

why did Soarer harness came up?

You said there is a thing already for the jza70 send me the link so I don't have to keep doing ti myself

The soarer harness has a configuration, but does not have tems or ABS included in it.

 

[Pernilongo]

http://web.archive.org/web/20060323191804/www.1jz-gte.us/92Supra6.html

/\ on the bottom "connector mapping"

http://www.1jz.com/tech/docs/wiring/

 

[92TealSupra]

http://web.archive.org/web/20060323191804/www.1jz-gte.us/92Supra6.html

/\ on the bottom "connector mapping"

http://www.1jz.com/tech/docs/wiring/

I like those PDF's, thanks.

 

[Guyana00]

Those were the ones I was using, that's one of the ones I uploaded in the first post. That's why when I was referring to pin #14 on IH1 I thought you knew what I was talking about.

 

[92TealSupra]

Those were the ones I was using, that's one of the ones I uploaded in the first post. That's why when I was referring to pin #14 on IH1 I thought you knew what I was talking about.

Ahh see, I didn't because I didn't have that Starter should be there any day...

 

[Flateric]

http://web.archive.org/web/20060323191804/www.1jz-gte.us/92Supra6.html

/\ on the bottom "connector mapping"

http://www.1jz.com/tech/docs/wiring/

Damn, I didn't have those PDF's thankyou very much, I can make use of that site for referencing. Good find.

 

[Pernilongo]

Damn, I didn't have those PDF's thankyou very much, I can make use of that site for referencing. Good find.

Well they've been around forever. i remember using them 3years ago. i dont know why nobody sticked them.

 

[djblastsupratuner]

hey 92TealSupra you think you can do wiring for my car if you have those pdfs? i know you have done all 89+ wiring but mine is pre 89 let me know!

 

[Guyana00]

Ahh see, I didn't because I didn't have that Starter should be there any day...

Shouldn't it be a water pump :aigo:

 

[terrible one]

i just used those pdfs to wire my car but be careful if you have an automatic 1jz engine.One of the plugs has differnt color wires but if you search it here on the forum someone breaks down the automatic plugs. My car is up and running but my tach and temp gauge isent working or dash lights.

 

[nctexan]

Quick question, does anyone know which set of the PDF's would apply to a late '89T MT? One set is explicitiy defined as being for 1987-Early 89, and the other for 90+.

 

[JonoTurbo]

The wiring on 89's is usually slightly different than all other years. Check the plugs in the glovebox area of your car and match them up to the pictures on the pdf's. The B1 connector is a big clue, the 88 style one has an additional row on the bottom of 3 pins.