Self-Check Diagnostics

SELF-CHECK DIAGNOSTICS
With the ignition ON, the Compass/Temp Mirror can perform a diagnostic self-check by pressing and holding the Zone/Cal button (left reading lamp button) for 20 - 25 seconds. The internal diagnostics will sequence the following five tests:

1. VF segment display - Illuminates the segment patterns one at a time for 1 second each as follows:
- CAL
- ZONE
- N
- NE
- E
- SE
- S
- SW
- W
- NW
- 0 through 9
- degrees C
- degrees F

2. CTM memory - ROM Checksum
3. CTM memory - RAM
4. CTM memory - EEPROM
5. Compass Test

During the self-check, if any of the internal tests fail, the Compass/Temp Mirror will display an "F" and the number of the test that failed. If more than one test fails "FO" will be displayed. P- Pass or F- Fail will be displayed until the Zone/Cal button (left reading lamp button) is pressed and released or the ignition is cycled. If all of the tests pass, the Compass/Temp Mirror will display "P,'. A VF segment that fails to illuminate will not cause the

Compass/Temp Mirror to display an "F". If any segment fails to illuminate or the Compass/Temp Mirror displays "F", the Compass/Temp Mirror must be replaced.

To exit self-check diagnostics, press and release the Zone/Cal button or cycle the ignition to return to normal compass/temp operation.