Outside Temperature Display: Adjustments
Outside Air Temperature Indicator Calibration
Description
The outside temperature sensor is located behind the center of the front bumper. The gauge control module uses measurements from this sensor provide 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 heat soak the outside air temperature sensor and cause inaccurate readings. Logic has been written into the gauge control module to help prevent abnormal of fluctuating outside air temperature indicator readings.
NOTE: To test the outside air temperature sensor, refer to the test procedure Outside Air Temperature Sensor Test.
Outside Air Temperature Indicator Logic
Initial outside air temperature indication after the ignition switch is turned to ON (II).
- If the engine coolant temperature is 140 °F (60 °C) or higher when the ignition switch is turned to ON (II), the outside air temperature indicated the last time the key was turned off will be displayed regardless of the current temperature measured by the outside air temperature sensor.
- If the engine coolant temperature is 139 °F (59 °C) or lower when the ignition switch is turned to ON (II), the current temperature measured by the outside air temperature sensor will be indicated.
Update to the outside air temperature indicator while driving
If the temperature measured by the outside air temperature sensor is greater than the temperature on the outside air temperature indicator, the outside temperature indicator increases by 1 °F (1 °C) per minute after the vehicle speed is greater than 19 mph (30 km/h) for more than 30 seconds. It will continue to increase until the current outside air temperature is indicated. So, the first change to the outside air temperature indicator is 1 minute and 30 seconds after the vehicle speed is greater than 19 mph (30 km/h). If the vehicle speed drops below 19 mph (30 km/h), the indicator will not update again until the vehicle speed is increased to 19 mph (30 km/h) or more for more than 1 minute and 30 seconds again.
If the outside air temperature is less than the 140 °F (60 °C), the temperature decreases 1 °F (1 °C) every 2 seconds until the current outside air temperature is indicated.
If the outside air temperature is less than the indicated temperature, the temperature decreases 1 °F (1 °C) every 2 seconds until the current outside air temperature is indicated regardless of vehicle speed.
Troubleshooting
If the indicator displays "- - -" for more than 2 seconds after selecting the outside air temperature display mode, check the climate control system or multiplex integrated control system for DTCs (see B-CAN System Diagnostic Test Mode A) Troubleshooting - B-CAN System Diagnosis Test Mode A.
Calibration
EX, EX-L, and Touring models
The outside air temperature indicator's displayed temperature can be recalibrated ±5 °F (or ±3 °C) to meet the customer's expectations.
1. Turn the ignition switch to ON (II).
2. Select the outside air temperature display and press and hold the SELECT/RESET knob for 10 seconds. While you continue to hold the button, the display will scroll through temperature settings from +5 °F to -5 °F (or +3 °C to -3 °C) as shown.
3. When the desired correction value appears on the display, release the button, and the recalibrated outside air temperature will be displayed.
Each time a desired correction value is entered, it replaces the previous value.
Example:
Touring model
The outside air temperature can be calibrated in the MID with the Customized Setting function. To enter the customizing mode, the vehicle must be stopped, with the transmission in Park. Press and hold the INFO button on the steering wheel for about 3 seconds while the multi-information display is in its normal message mode. Select CHANGE SETTINGS, then select METER SETUP, then select ADJUST OUTSIDE TEMP DISPLAY. Press the INFO button to adjust the temperature to the desired setting.
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.
