Horsepower mode-Note:This reading will vary from advertised
engine horsepower. It includes losses through the drivetrain and other
factors such as fuel octane, wind, weight, road grade, etc. In order to
obtain the most accurate numbers, it is important that the correct
vehicle weight be stored in the gauge (see Setup section). The gauge has
been preset with the weight preset to 3830 lb (1737 kg) and should be
modified as needed. To select horsepower mode, do the following:
1. Press MODE until “HP” (horsepower) is displayed.
2. Make sure the vehicle is at a complete stop at the beginning of your
course, then press ENTER to confirm. The display will show “CAL” to
indicate mode has been entered.
When the display reads “Go”,
1. Lightly accelerate your vehicle through first gear.
2. Shift between gears at approximately halfway to redline.
3. In second gear, (ideally at 2,000 rpm) accelerate under full throttle up
to, but not exceeding, the engine redline.
4. Let off the accelerator and safely stop the vehicle to view your results
once redline has been reached.
5. The gauge will display your horsepower results. Press B to view your
results again. See the section on viewing best run/last run/etc results.
Setup mode:(There are eight parameters that can be adjusted in Setup
mode).
To select Setup mode, do the following:
1. Press the mode button until “Sup” is displayed.
2. Press the enter button to confirm.
3. Press the exit (C button) to exit setup mode.
Vehicle calibration:
Performing this operation will be necessary in order to obtain correct
readings from the performance gauge while operating in real time mode
and performance modes. The vehicle calibration function allows the
gauge to determine its angle, pitch, and general location in your vehicle,
and to compensate accordingly, allowing you to mount it virtually
anywhere in any position, and still get accurate readings.
To select vehicle calibration mode, enter Setup as described above, then
press the A button until “VCAL” is displayed, then press ENTER to
confirm. “REDY” should display. Bring the vehicle to a complete stop on
a flat and level surface and then press ENTER. “HOLD” will display. At
Boss302 Unique Features
14
2012 05+ Mustang(197)
Supplement, 2nd Printing
USA(fus) 
REAR SEAT DELETE PANELS (IF EQUIPPED)
In the event of battery failure, you can access the trunk area by doing
the following:
1. Remove the two top fasteners by
turning them counterclockwise.
2. Remove the trunk access panel
(located behind the cross brace) by
pulling it slightly down while
pushing it rearward (toward the
trunk).
To remove the rear floor panel, do the following:
1. Remove the two top fasteners by
turning them counterclockwise.
2. Lift the top of the two bottom
fasteners with a flat-end
screwdriver, then remove them.
3. Remove the rear floor panel.
4. Remove the trunk access panel
(located behind the cross brace) by
pulling it slightly down while
pushing it rearward (toward the
trunk).
Maintenance and Specifications
36
2012 05+ Mustang(197)
Supplement, 2nd Printing
USA(fus)