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Edz EH TT 1UZ V8

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Wiring the 1UZ (Crown)

Disclaimer: firstly, this is how I did/am doing it, if you choose to follow my instructions, you do it at your own risk.

Note this is for the Crown, not a Soarer! The crown has seperate computers for the motor and gearbox, the soarer has one computer for both and is a bit trickier if you want to get rid of the auto! It also has a rubber donut output shaft on the auto rather than a spline as on the crown.

 

Ignition and sensor wiring

These are pics of the standard crown / 1UZ coil, igniter, speed sensor and crank angle sensor with their wiring.

Click either pic for a larger combined pic to print.

8860 Trigger and Sensor wiring

Cylinder Order

No 1 is to the right from the front (not left as in Aussie engines). Check the pic.

Firing Order

1 8 4 3 6 5 7 2

Wiring for the Auto

These are the two wiring sockets on the gearbox. This will help you to wire up a tiptronic as I am.

  • S1 - Solenoid 1 (Gear selection)
  • S2 - Solenoid 2 (Gear selection)
  • S3 - Solenoid 3 (Torque converter lockup)
  • S4 - Solenoid 4 (Line pressure - max when not connected)
  • B+ - 12v from ignition - input for solenoids

Gears - switching the solenoids

  • 1st = S1 On S2 Off
  • 2nd = S1 On S2 On
  • 3rd = S1 Off S2 On
  • 4th = S1 Off S2 Off

Gearbox outputs

These let you know what gear you are in - outputs to the gear selector indicator / speedo

  • P = Park
  • R = Reverse
  • N = Neutral
  • D = Drive
  • 2 = Second
  • L = Low
  • B+ = 12v from Ignition
  • NSW - the 2 contacts for theNeutral safety switch (makes/breaks circuit when not in park or neutral - stops you starting in gear - very dangerous and illegal)

Torque Converter Lockup

This is a good circuit that will cut the lockup when you touch the brakes. I'll look at using the extra inputs/outputs from the 8860 to control it instead of this - ie: off below 1% throttle, above 12% throttle to disconnect it with a relay, the tiptronic will engage and disengage it. They are very weak and will die if loaded up too much (which a turbo or two will do). Good to use them though as they improve fuel economy and let the gearbox run cooler.

 

 

  
   
   

 

 
 

 

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