Displaying Sensor Inputs at the Climate Control Unit

The climate control unit has a mode that displays sensor inputs it receives. This mode shows you what the climate control unit is receiving from each of the sensors, one at a time, and it can help you determine if a sensor is faulty.

Check These Items Before Using The Sensor Input Display Mode: 

1. Turn the ignition switch ON (II), and check the recirculation door function; press the recirculation button to switch from FRESH to RECIRC. The air volume and sound should change slightly.
2. Set the temperature control knob to the desired test temperature. When selecting the test temperatures, note these items:
   • "Lo" temperature setting will default to MAX COOL, VENT, and RECIRC.
   • "Hi" temperature setting will default to MAX HOT, FLOOR, and FRESH.
   • 61 through 89°F settings will use the automatic climate control logic.
3. Turn the ignition switch OFF.

To Run The Sensor Input Display Mode, Follow These Steps: 

1. Turn the ignition switch OFF.
2. Press and hold both the AUTO and RECIRC buttons, then start the engine.
3. After the engine starts, release the buttons. The climate control display will flash the sensor number and then the value for that sensor. Record the value displayed.
Fig 1: Identifying Sensor Numbers
Courtesy of AMERICAN HONDA MOTOR CO., INC.
NOTE:
• The sensor values will be displayed in degrees Celsius (°C) or an alphanumeric code. Use the chart to convert the value to degrees Fahrenheit (°F).
• If the sensor value displays "Er" this indicates there is an open or short in the circuit or sensor. Run the self-diagnosis function to check for a DTC.
• If necessary, compare the sensor input display to an alike, known-good vehicle under the same test conditions.
• If the sensor is out of the normal range, refer to the sensor test, or substitute the sensor with a known-good sensor, and recheck.
4. To advance to the next sensor, press the rear window defogger button.
5. To cancel the sensor input display mode, press the AUTO button, or turn the ignition OFF.
   Fig 2: Celsius To Fahrenheit Conversion Table (1 Of 2)

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
   Fig 3: Celsius To Fahrenheit Conversion Table (2 Of 2)

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
   Fig 4: Alphanumeric Conversion Table

   Courtesy of AMERICAN HONDA MOTOR CO., INC.