Installing A Custom Tune File - SCT X4 User Manual

3.2 INSTALLING A CUSTOM TUNE FILE

1. Connect the X4 to your vehicle's OBD II service port using the OBDII cable provided in the
packaging.
2. With the unit powered on and connected to the vehicle, highlight and select the "Program
Vehicle" option.
3. Next you will be prompted with a "Street Use Notice" which you must agree to. If you
approve and agree, press the center button on the keypad to select "Continue" to proceed.
4. You may be prompted to "Turn Key On". If so, please turn the ignition key to the "On"
position but do not start the vehicle. Highlight and select "Continue"
5. A screen will appear asking you to select your vehicle. Using the Down arrow key, scroll
to the section labeled "Custom Tune(s)". Highlight and select the desired custom tune to
transfer to the vehicle.
6. Next you will be prompted to adjust options if any are available within the custom tune.
These options are parameters available from SCT Dealer to make minor adjustments to the
calibration being loaded. It is not necessary to make adjustments in this area. If you wish to
make an adjustment, simply press the option you would like to change and the screen will
change to display the available values for that option. When you are satisfied with the values
of these options or if you do not wish to change them, simply press "Approve".
7. You will now be prompted with a screen to review your vehicle and options (if any selected).
Press "Continue".
8. The next screen, possibly two, will differ between vehicles. You will be prompted to "Turn
Key Off" and/or "Turn Key On". It's important here to follow the prompts from the device.
9. X4 will now download the current file that is in your vehicle, referred to as the "Stock File",
and will proceed to upload the new calibration you have selected, with all options applied if
you have selected any, to your vehicle.
10. After this is complete the device will display a "Download Complete" screen. You can now
turn the key to the off position and select "Done".
11. For GM vehicles you may see a "Power Down ECU" screen while the vehicle completes some
power down procedures.
12. You have now successfully tuned your vehicle!
Custom tunes are built by SCT's network of Custom tuning Dealers and any questions related to
them need to be directed toward the tuning dealer.
SECTION 3: PROGRAMMING YOUR VEHICLE
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