Accord L4-2.4L (2005)
Outside Temperature Display: Testing and Inspection
Outside Air Temperature Indicator Test
NOTE: To test the outside air temperature sensor.
The outside air temperature sensor for the indicator is mounted behind the front bumper. Because of this, the temperature reading can be affected by heat
reflection from the road, engine heat, and even exhaust from the surrounding traffic. To prevent bogus readings, the display uses a specific logic as
shown.
The outside air is warmer than when the ignition switch was turned OFF (ACC or LOCK) position:
-
If the ignition switch was turned OFF for less than 2 hours, the displayed temperature when you turn the ignition switch to ON (II) stays at the
ignition switch-off temperature until the vehicle has gone faster than 18 mph (11 km/h) for 30 seconds, then the display immediately updates to
the measured outside air temperature.
-
If the ignition switch was turned OFF for 2 hours or more, the displayed temperature when you turn the ignition switch to ON (II) rises 1 degree
every minute until the outside air temperature is reached.
The outside air is cooler than when the ignition switch was turned OFF (ACC or LOCK) position:
-
If the ignition switch was turned OFF for less than 2 hours, the displayed temperature when you turn the ignition switch to ON (II) is the ignition
switch-off temperature.
The displayed temperature then drops 1 degree every 2 seconds until the reading matches the outside air temperature.
-
If the ignition switch was turned OFF for 2 hours or more, the displayed temperature is the measured outside air temperature.
Forced Display
You can also force the indicator to display the measured temperature.
1. Turn the ignition switch OFF.
2. Remove the No. 7 (10 A) fuse from the under-dash fuse/relay box for 60 seconds, then reinstall it.
3. Turn the ignition switch ON (II).
Troubleshooting
If the indicator displays "---" for more than 2 seconds after selecting the outside air temperature display mode, check the climate control system for
DTCs, or an open in the LT BLU wire between the under-dash fuse/relay box and the climate control unit.