Programming and Relearning

If the "CAL" indicator is lit, the compass should be calibrated. The vehicle will be shipped with the "CAL" light on. If during normal driving, the compass appears to be inaccurate, calibration may be required.

To Calibrate the Compass
1. Put the CMTC into COMPASS/TEMP mode using the STEP button.
2. Depress the STEP and US/M buttons simultaneously until CAL appears in the display.

Compass Calibration:

3. Drive the vehicle in about two circles on a level surface in an area free of large metal objects, such as other vehicles, large buildings, bridges, underground cables, railroad tracks, etc.

NOTE: The compass will usually calibrate after the vehicle has been driven in a circle comprising five quadrants or one and a quarter turns.

When the "CAL" indicator goes off, the compass is calibrated and should display correct headings (for all conditions). Verify proper calibration by checking North (N), South (S), East (E), and West (W). If the compass does not appear accurate, repeat the calibration procedure in another area.

VARIANCE SETTING PROCEDURE
Variance is the difference between magnetic North and geographic North.
1. Depress the STEP and US/M buttons simultaneously until VAR appears in the display, then release the buttons.




2. The CMTC will display the current variance zone (1-15). If the variance needs to be changed use the STEP button to select the correct zone number from the figure below. After selecting the desired variance zone, the CMTC will return to normal operation after 5 seconds or by pressing the STEP and US/M buttons simultaneously.