Component Tests and General Diagnostics
COMPASS/TEMPERATURE MIRRORIf the Compass/Temperature mirror lights up and functions, however the accuracy of the information displayed is in question or certain displays are not working, refer to the self-diagnostic test below. If the mirror doesn't light up or function, proceed with the following preliminary tests:
1. Disconnect the compass/temperature mirror electrical connector. Using a voltmeter, check for 12v on the fused B+ circuit cavity. Voltage should be present. If OK go to Step 2, If NOT OK, repair the short or open circuit as required.
2. Using a voltmeter, check for 12v on the fused ignition run circuit cavity with the ignition switch in the RUN position. Voltage should be present. If OK go to Step 3, If NOT OK, repair the short or open circuit as required.
3. Key Off. Using a ohmmeter, check for continuity to a good ground on the ground circuit cavities of the compass/temperature mirror electrical connector. Continuity should be present. If OK, replace the mirror assembly, If NOT OK, repair the short or open circuits as required.
COMPASS/TEMPERATURE MIRROR SELF-DIAGNOSTIC TEST
NOTE:
- If the ignition switch is turned off during any period of the self diagnostic procedure, the mirror will exit the self diagnostic mode.
- Pressing and releasing the zone/calibration button will exit the self diagnostic mode and return to the standard compass/temperature mode
To perform the compass/temperature mirror self diagnostic routine:
4. Turn the ignition to the ON position.
5. Press and hold the zone/calibration (left reading lamp button) button for 20 to 25 seconds.
6. During testing, if any of the test fail, a "F" will appear. If more than one test fail, "FO" will appear. If "F" or FO" appear, replace the compass/temperature mirror.
7. If a "P" is displayed, that indicates that the compass/temperature mirror has passed the self diagnostic procedure.
NOTE: If, after performing the self diagnostic procedure the compass still has an incorrect reading, perform the compass calibration or compass variation adjustment.