Installation Manual

TIRE SIZE

Press ‘Y’ if the tires installed have an overall height that is

different than the original factory tire size. This will

allow

for correction of speedometer and odometer readings

for the

new tire height. Pressing ‘Y’ will display this screen:

Use the

s and t arrows to adjust the tire height in 1/4”

increments. The minimum and maximum tire size will be

shown on the programmer screen. Press the ‘Y’ button to

lock in the new tire height.

IF TIRE HEIGHT HAS BEEN CHANGED FROM ORIGINAL, PRESS Y

IF TIRE HEIGHT HAS NOT BEEN CHANGED, PRESS N

USE UP/DOWN ARROWS TO SELECT CORRECT TIRE HEIGHT, THEN PRESS Y TO SELECT OR N TO EXIT.

_ _._ _”

If the tire height is not known, ask a tire dealer or use the

following steps below:

1. Place a chalk mark on the tire where it contacts the pavement

and also mark the pavement. These marks should be at the center

of the tire footprint pointing straight down to the pavement.

2. Roll the vehicle in a straight line until the chalk mark makes

one revolution and is pointing straight down at the pavement

again. Mark the pavement again at this new spot.

3. Measure (in inches) the distance between the two (2) marks

on the pavement. Divide the measurement by 3.1416. This

will give you the tire height in inches.

HOW TO DETERMINE TIRE HEIGHT

Changes to top-speed limiter is not recommended for load rated

tires. Serious damage or injuries could occur. Also, for safety

reasons, the actual top-speed limit set in the vehicle is two (2)

miles-per-hour less than the selected tire’s speed rating.

IMPORTANT NOTE