Chrysler PT Cruiser Owner's Manual page 239

UNDERSTANDING YOUR INSTRUMENT PANEL 237
NOTE: Magnetic materials such as a laptop computer,
cell phone, and PDA's (anything with a battery), should
be kept away from the top of the instrument panel. This
is where the compass sensor is located.
To Set the Variance
Start the engine, and leave the transmission gear selector
lever in the PARK position. Press and hold (approxi-
4
mately ten seconds) the compass/temperature reset but-
ton until the current variance zone number is displayed.
To change the zone, press and release the reset button to
increment the variance one step. Repeat as necessary,
until the desired variance is achieved.
NOTE: The factory default zone is 8. During program-
ming, the zone value will wrap around from zone 15 to
zone 1.