Displaying Sensor Inputs at the Climate Control Unit

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 temperature, 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.
- "58 through 86 °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
4. Turn the ignition switch OFF.
5. Press and hold both the AUTO and recirculation buttons while starting the engine. Release the buttons.




6. Turn the ignition switch ON (II). Use the navigation display hard buttons as described below:
- Make sure the battery is connected, then press and hold the three buttons (Menu, Map/Guide, and Cancel), and keep them pressed for approximately 5 seconds. The display screen will go directly to the "Select Diagnosis Items" menu shown below.
- Touch the Unit Check button, then touch the Aircon button.

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. Check for DTCs using the HDS, or refer to checking DTCs by DTC indication.
- If necessary, compare the sensor input display to a known-good vehicle under the same test conditions.
- If the sensor is out of the normal range, refer to the sensor test or substitute a known-good sensor, and recheck.

7. To cancel the sensor input display mode, press the AUTO button or turn the ignition switch OFF.




General Troubleshooting Information