1997 Pontiac Bonneville Owner's Manual - Page 137

Calibrating the Compass [ oE MD ) CALIBRATE > Sometimes, strong magnetic fields can affect the compass. If the CALIBRATE light comes on as shown above, try calibrating thecompass as follows: 1. Drive the car to an open, flat area. 2. Press and hold the MODE button until the CALIBRATE light reappears, 3. Release the MODE button. The heading display will start to rotate. All electronic compasses need to kn'ow the magnetic profile of your car. This is called calibration and isdone automatically by your compass. But, the feature is available if you would like to manually calibrate. 4. Drive the car in small circles. Don't drive faster than 10 mph (16 km/h). 5 . Drive in circles until the CALIBRATE light goes out. It usually takes one to five circles. 6. Your compass should be calibrated. You will know this when the direction bars are on and the CALIBRATE light is off.