Acura 3.5 RL Manual page 1334

Navigation System
System Diagnosis Mode (cont'd)
Tire Calibrate
As the vehicle moves, the navigation system receives
speed pulses from the PCM. These pulses are converted
using a conversion factor to a mph speed that moves
the vehicle position (VP) on the map. The navigation
system has an internal tuning function that generates
and refines this factor based on actual driving. The
"Level" indicates the status of the tuning. At initializa-
tion, it begins at 0, and increases to 10 as the navigation
system is used.
• The "Auto Tuning" is factory set to "ON", and should
remain on.
• The "LEVEL" indicates the tuning status. If it is less
than 10, the unit is still calibrating.
• The "Tire-Cal. Tuning" and the "Set" button should
not be used. It is for factory use only.
Functional Setup
Touch the item you want to check.