The following steps outline the installation procedure:
1.Remove the factory ECU from the vehicle: Ensure the key is in the OFF position. The factory ECU is located:
·Celica and JZX100 - in the center of the vehicle under the dash
·MR2 - in the boot attached to the firewall
·Supra - under the passenger foot panel
Unplug the wiring harness from the factory ECU. Remove the bolts that retain the ECU mounting structure and remove the ECU from the vehicle. DO NOT touch the exposed pins in the factory ECU connector.
2.Remove the factory ECUs circuit board from its enclosure: Ensure you are following the given anti-static guidelines and ARE WEARING A CONDUCTIVE WRIST STRAP connected to a conductive working surface. Remove the top cover by removing the side retaining screws. Remove the circuit board by removing the corner screws. Hold it only by the plastic header and place it aside.
3.Modify the case if required: It may be necessary to cut the center bar out of the enclosure using the appropriate tool. This will be necessary if the center bar interferes with the ECU.
4.Connect the ECU USB tuning cable and the expansion loom to the Link Plug-In ECU if required.
5.Fit the Link Plug-In ECU: Place the Link ECU on the base plate and carefully fit the four corner screws. Place the factory ECU in the packaging your Link ECU came in for its protection.
6.Refit the top cover: It may be necessary to widen the slot around the main header to allow cables to exit. Ensure that any modifications are de-burred to prevent cutting into cable insulation.
7.Reassemble the enclosure and fit the ECU back to the vehicle.
8.Connect the ECU to the factory wiring loom.
9.Do NOT attempt to start the vehicle. Proceed to read through the remaining sections of this manual first.
Note: The bolt that holds the Toyota Supra header plug in place will screw right through all the thread and spin. This is normal.