I dont know where this plug goes and Im having a tough time figuring it out. I originally got the whole motor from a friend and he says that the plug goes to the MAP sensor but I have the Map sensor hooked up to its plug already.

It looks like its been extended. The plug is on the main harness by the MAP sensor plug. How many MAP sensors does the 1JZ have? Anyone have any ideas?

 

I swear my 1J has 2. 1 sensor on the firewall and 1 close to the igniter. The both look to be a map sensor because they say Presure sensor and look to be the same color shape size and writing on the sensor itself. the actual map sensor that is sending the reading for boost is the one next to the igniter.
here is a picture of my Supra Engine bay with the 1J in it.

 

o2 sensor?

 

^^^wrong side for an o2 sensor.

 

The one that is plugged into the MAP sensor on the intake manifold is all you need. The one by the igniter is the reading for the JDM gauge cluster boost gauge. JZA70 1J's have it too. They both say "turbo pressure sensor". Don't worry about. It will run fine without it.

 

^^^^^^^^^^^I agree with said info above the pics are from my JZA70 Mk3 Supra

 

what color are the wires going to the plug?

it could also be the plug for the heater core VSV

 

No, it could not. Heater VSV is two wire plug. MAP/turbo pressure sensor is 3 wire.

 

Its for the heater core VSV , thanks