Compass: Testing and Inspection

COMPASS DISPLAY
To display the vehicle direction, the OTIS processes information from a sensor internal to the module. The OTIS is self-calibrating and requires only variance adjustments dependent upon location. The OTIS displays the label CAL whenever the compass is in the fast calibration mode.

If all three of the following conditions listed below occur, the vehicle must be demagnetized.

- Compass portion of the display is blank
- Temperature portion of the display is OK
- The label CAL is illuminated

If demagnetizing the vehicle is needed, refer to the demagnetizing procedure. After demagnetizing, to calibrate the compass refer to Calibration Procedure and to set the variance refer to Variance Procedure. If the compass portion of the display is still blank, replace the OTIS.