Outside Temperature Display: Adjustments
Outside Air Temperature Indicator Calibration
NOTE: To test the outside air temperature sensor, refer to the outside air temperature test procedure Testing and Inspection.
Description
The outside air temperature sensor is located behind the center of the front bumper. The gauge control module uses measurements from this sensor 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 or fluctuating outside air temperature indicator readings.
Outside Air Temperature Indicator Logic
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 to ON (II), the outside air temperature indicated 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 to ON (II), the current temperature measured by the outside air temperature sensor is indicated.
Information Update to the Outside Air Temperature Indicator While Driving
Engine coolant temperature is 140 °F (60 °C) or higher:
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 1 minute and 30 seconds. It continues 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 does not update again until the vehicle speed has increased to 19 mph(30 km/h) or more for more than 1 minute and 30 seconds again.
Engine coolant temperature is 140 °F (60 °C) or lower:
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 for and resolve all B-CAN related DTCs, then check the HVAC system or multiplex integrated control system for DTCs.
(see B-CAN System Diagnosis Test Mode A Troubleshooting - B-CAN System Diagnosis Test Mode A)
Calibration Procedure
The outside air temperature indicator's displayed temperature can be recalibrated ±5 °F (±3 °C) to meet the customer's expectations.
With multi-information display
1. Turn the ignition switch to ON (II).
2. Push the INFO (^/�V) button to select the "CUSTOMIZE SETTINGS", then push the SEL/ RESET button.
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 switch and the INFO (^/�V) switch.
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 ° from sensors.
Example:
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 38 °F (4 °C) or less the first time you turn the ignition switch to ON (II).
Without multi-information display
1. Turn the ignition switch to ON (II).
2. Select the odometer/trip A or odometer/trip B display.
3. Select the outside air temperature display and press and hold the SEL/RESET switch for 10 seconds. While you continue to hold the button, the display scrolls through temperature settings from +5 °F to -5 °F (or +3 °C to -3 °C) as shown.
4. When the desired correction value appears on the display, release the button, and the recalibrated outside air temperature is displayed.
Each time a desired correction value is entered, it replaces the previous value.
NOTE: The recalibration temperature is not the value the sensor sees. Therefore the temperature can only be adjusted ±5 ° from sensors.
Example:
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.
