AEM 30-6101 Series 2 Plug & Play EMS - Manual (Page 3)

Page 3 of 13
This product is legal in California for racing vehicles only and should never be used on public highways.
Read and understand these instructions BEFORE attempting to install this product.
1) Install AEMTuner software onto your PC
The latest version of the AEMTuner software can be downloaded from the ‘Current
AEMTuner
Software & Discussion’ section of the AEM Performance Electronics forums.
Series 2 units are not supported by the older AEMPro tuning software.
2) Remove the Stock Engine Control Unit
a) Access the stock Engine Control Unit (ECU). The location of the ECU on the Supra is
behind the passenger side kick panel.
b) Carefully disconnect the wiring harness from the ECU. Avoid excessive stress or
pulling on the wires, as this may damage the wiring harness. Some factory ECUs use a
bolt to retain the factory connectors, and it must be removed before the harness can be
disconnected. There may be more than one connector, and they must all be removed
without damage to work properly with the AEM ECU. Do not cut any of the wires in the
factory wiring harness to remove them.
c) Remove the fasteners securing the ECU to the car body, and set them aside. Do not
destroy or discard the factory ECU, as it can be reinstalled easily for street use and
troubleshooting.
3) Install the AEM Engine Management System
a) Plug the factory wiring harness into the AEM EMS and position it so the wires are not
pulled tight or stressed in any manner. Secure the EMS with the provided Velcro
fasteners.
b) Plug the communications cable into the EMS and into your PC.
c) Turn the ignition on but do not attempt to start the engine.
d) At the time these instructions were written, new EMS units do not require USB drivers to
be installed to the PC.
e) With the AEMTuner software open, select ECU>>Upload Calibration to upload the
startup calibration file (.cal) that most closely matches the vehicle’s configuration to be
tuned. Check the Notes section of the calibration for more info about the vehicle it was
configured for. These files can be found in the following folder:
C:\Program Files\AEM\AEMTuner\Calibrations\Toyota\
f) Set the throttle range: Select Wizards>>Set Throttle Range and follow the on-screen
instructions. When finished, check that the
‘Throttle’ channel never indicates less than
0.2% or greater than 99.8%, this is considered a sensor error and may cause some
functions including idle feedback and acceleration fuel to operate incorrectly.