U
ser’s Manual
3.0
Programming your vehicle
3.1
Installing a Preloaded 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 “S
treet 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, highlight and
select the appropriate vehicle
model from the list of vehicles provided.
6.
Next you will be prompted to adjust options. These options are items available from SCT 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 the right
arrow to highlight
“Approve”
.
7.
You will now be prompted with a screen to review your vehicle and options (if any selected).
Press “Conti
n
ue”
.
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 d
evice will display a “Download Complete” screen. You can now t
urn
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!
Which tune file do I choose?
Gasoline Engine:
Tunes are based on Octane, make sure you choose the correct octane rating based on the octane you are
running in your vehicle.
87 Octane
91 Octane
93 Octane
Diesel Engine:
We offer a few tunes b
ased on what you’re going to be doing with your truck.
Street:
Less power than Performance. Moderate gain over stock, safe for light towing, under 5k
lbs.
Performance
:
The most aggressive preloaded diesel tune. Good for everyday use, racing, or
economy but not recommended
for any type of towing.
Tow
:
Should be used when towing any significant load. Shifting is towing centered
