Toyota Supra MKIII Firmware Version 3.1 PDF Installation Manual

Stealth Install:
Use the cruise control paddle from the 89+ supra as a built in paddle shifter. Stock cruise control operation is retained when the Suprastick is in the “Fully Automatic” mode. Use the stock ECT PWR button to switch between manual and automatic modes of the Suprastick.

The white Manual / Auto selector lead may be wired to the #2 in the wiring diagram and use the ECT switch next to the gear shifter for mode selection, or any 12 volt switch and source. The cruise control paddle wire is located under the driver’s side dash. It is the pink / green wire in the wire loom coming from the steering wheel and connecting to the cruise control ECU. It will shift voltages when the paddle is pressed up or down, and be constant 12 volts when the paddle is not touched.

Initial Tests
After connecting all of the SupraStick wires, but before replacing the kick panels and glove box, start by turning the car’s ignition to on (do not start the car). The SupraStick unit will click twice. Select manual shifting mode. Shift up and down through the gears. You should hear a distinctive click in the SupraStick box and in the tranny for each shift. You may verify the following voltages on wires 13-15 for each gear.

Start the car, and put SupraStick into the normal automatic mode. Connect a test light or a voltmeter between the Unit Test Signal Wire and +12 volts. You will see continuity when any of the following conditions are true:
Upshift Signaled
Downshift Signaled
Brake Applied
Throttle > 5%
RPM between 1100 and 1400 rpm. Once you have completed the tests to your satisfaction and reinstalled the kick panels and glove box the instillation is complete.

The unit is programmable to suit your car’s transmission and your own personal preferences. Enter the programming mode by pressing the Manual / Auto Selector 5 times within 5 seconds, ending with the manual mode on. The unit will flash the Unit Test Signal 3 times. The following diagram describes how to program the unit. The program mode starts in the upper left corner. Downshift to move down one row, Upshift to move over a column. The Unit Test Signal will flash long flashes to indicate a new row selected, and short flashes to indicate a new column selected. Once you hit the end of a row or column, the next row or column signal will automatically loop back to the beginning of that respective row or column.

Example: To program a rev limit +300, stall speed 3000, lockup delay disabled, and the shift light of 5500 rpm, enter the programming mode – the unit flashes 3 times in acknowledgement. Upshift once, the unit flashes 2 quick flashes. Downshift, the unit flashes 2 long flashes. Downshift, the unit flashes 3 long flashes. Upshift, the unit will flash quickly twice, Upshift, the unit will flash quickly 3 times, and Upshift, the unit will flash quickly 4 times. Downshift, the unit flashes 4 long flashes. You must wait for the flashes before shifting again.

Download Toyota Supra MKIII Firmware Version 3.1 PDF Installation Manual