Manual Compass Calibration
COMPASS/TEMPERATURE MODULE (CTM)The overhead console houses the Compass/Temperature Module display and two reading and courtesy lamps. This display provides the outside temperature and one of eight compass readings to indicate the direction the vehicle is facing. The ambient temperature sensor (ATS) monitors outside temperature and is hardwired to the Compass/Temperature Module.
There is a STEP button for the compass/temperature display located forward of the power sunroof switch (if equipped), between the lamps.
The STEP button is used to toggle the compass/temperature display to select either F degrees, C degrees, or OFF. When the vehicle is first turned ON, you may select:
- Blank display
- Compass/Temperature displayed in Fahrenheit (F degrees)
- Compass/Temperature displayed in Celsius (C degrees)
Depress and release the STEP button to cycle through the above display modes.
Setting Magnetic Zone Variance
Variance is the difference between magnetic North and geographic North. For proper compass function, the correct variance zone must be set. Refer to the Zone Variance map for the correct zone.
Follow these steps to check or change the variance zone:
- The ignition switch must be in the ON position and the Compass/Temperature Module display must not be blank.
- Depress and hold the STEP button for 5 - 10 seconds until ZONE appears in the display, then release the STEP button. The number displayed is the variance zone currently stored in the compass memory.
- To change the zone, depress the STEP button to scroll through the zone numbers 1 through 15, until the desired zone is displayed.
- After selecting the zone, wait approximately 15 seconds until the display returns to normal.
Compass Calibration
NOTE: Upon installation of a new overhead console, with the ignition ON, "CAL" will be illuminated in the display but the compass will not calibrate for 30 ignition cycles or 15 starts, OR until manually calibrated. For this reason, manual calibration of the compass is recommended after any replacement or appearance of the compass/temp display being "locked-up."
Manual Calibration
After any replacement or the appearance of a "locked-up" condition, you must calibrate the compass. Follow these instructions in order to ensure correct compass calibration:
- Drive the vehicle to an area away from any large metal objects or overhead power lines.
- Ensure that the proper variance zone is selected. See "Setting Magnetic Zone Variance."
- With the engine running, depress and hold the STEP button for 10 - 15 seconds.
- ZONE will appear in display, then CAL.
- Release the STEP button within 2 seconds of CAL illuminating.
- CAL is displayed.
- Drive slowly, less than 5 mph (8 kph) in 3 complete 360 degree circles.
- CAL will stay illuminated to alert the driver that the Compass/Temperature Module is in the calibration mode.
- After calibration, the CAL will turn off.
Auto Calibration Mode
During normal vehicle operation, the Compass/Temperature Module will continuously update the compass calibration to compensate for changes in the vehicle's magnetic field. If the Compass/Temperature Module appears to be "locked-up" or the compass displays false indications, the vehicle may need to be demagnetized. Refer to Demagnetizing Procedure.