Pontiac 2006 Grand Prix - Manual (Page 183)

To set or reset the tire inflation monitor system, use the
following procedures:
1. Press the set/reset button to reset the tire inflation
monitor system. TIRE INFLATION HAS BEEN SET
will appear on the screen If the “Check Tire
Pressure” message, indicating an irregularity in the
pressure of one of the tires, had previously
appeared on the DIC. If the “Check Tire Pressure”
message did not appear, and the set/reset
button is pressed, the system will reset, but no
acknowledgment message will appear on
the screen.
2. Press the options button again to advance to the
next screen.
Select the set/reset button to return to the main
(date) screen.
COMPASS CALIBRATION MODE: This menu allows
you to adjust for compass variance.
Setting the Compass
The compass is self-calibrating, which eliminates the
need to manually set the compass.
However, under certain circumstances, such as during a
long distance cross-country trip, it will be necessary
to compensate for compass variance and reset the zone
through the DIC.
Compass variance is the difference between the earth’s
magnetic north and true geographic north. If not
adjusted to account for compass variance, the compass
in the vehicle could give false readings.
In order to do this, the compass must be set or
calibrated to the variance zone in which the vehicle
is travelling.
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