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(Click images for a bigger picture!)
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. |
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8860 Trigger and Sensor wiring |
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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 |
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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
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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)
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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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