Outside Temperature Display: Adjustments

Outside Air Temperature Indicator Calibration

NOTE: To test the outside air temperature sensor, refer to the outside air temperature sensor test procedure Testing and Inspection.

Description

The outside temperature sensor is located behind the middle of the front bumper. The gauge control module uses measurements from this sensor provided by the climate control unit via the B-CAN communication line to display the outside air temperature.
Because of the location of the sensor, it may be affected by heat reflection from the road, engine and radiator heat, or hot exhaust from surrounding traffic.
These conditions can soak the outside air temperature sensor in heat and cause inaccurate readings. Logic has been written into the gauge control module to help prevent abnormal or fluctuating outside air temperature indicator readings.

Outside Air Temperature Indicator Logic

Initial outside air temperature is indicated after the ignition switch is turned ON (II).

Engine coolant temperature is 140 °F (60 °C) or higher:

If the engine coolant temperature is 140 °F (60 °C) or higher when the ignition switch is turned ON (II), the outside air temperature when the last time the key was turned off is displayed regardless of the current temperature measured by the outside air temperature sensor.

Engine coolant temperature is less than 140 °F (60 °C):

If the engine coolant temperature is less than 140 °F (60 °C) or lower when the ignition switch is turned ON (II), the current temperature measured by the outside air temperature sensor is indicated.

Troubleshooting

If the indicator displays --- °F (--- °C) for more than 2 seconds after selecting the outside air temperature display mode, check for and resolve all B-CAN related DTCs, then check the outside air temperature sensor or the gauge control module self-diagnostic function Testing and Inspection.






Calibration

The outside air temperature indicator's displayed temperature can be recalibrated ±5 °F (±3 °C) to meet the customer's expectations.

1. Turn the ignition switch to ON (II).

2. Push and hold the INFORMATION (NEXT or PREVIOUS) button for at least 3 seconds to enter the customizing mode.

3. While in the customizing mode, select the CHG SETTING, and enter the METER SETUP. Then select the ADJUST OUTSIDE TEMP. DISPLAY, and calibrate the value with the SEL/RESET button and the INFORMATION (NEXT or PREVIOUS) button.






4. When the desired correction value appears on the display, release the button, and the recalibrated outside air temperature will be displayed.

NOTE: The recalibration temperature is not the value the sensor sees.
Therefore the temperature can only be adjusted ±5 degrees from sensors reading.





NOTE: To recalibrate the display to the true temperature, remove the outside air temperature sensor (A), but leave it connected. Submerge the sensor and a thermometer (B) in a container of ice water (C). Select the calibration mode as described above, then recalibrate the display to the true temperature.






5. The snow mark is displayed when the temperature is 37 °F (3 °C) or less the first time you turn the ignition switch to ON (II).