Diagnosis System

HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM: DIAGNOSIS SYSTEM

1. DESCRIPTION

(a) Air conditioning system data and Diagnostic Trouble Codes (DTCs) can be read through the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to be malfunctioning, use the Techstream to check for malfunctions and perform troubleshooting.

2. CHECK DLC3

(a) Check the DLC3 General Information.

3. LIST OF OPERATION METHODS

(a) By operating each of the air conditioning control switches as shown in the diagram below, it is possible to enter diagnostic check mode.





4. INDICATOR CHECK

(a) Turn the power switch off.

(b) Turn the power switch on (ACC) and wait at least 5 seconds.

(c) Turn the power switch on (IG) while pressing the integration control and panel assembly "AUTO" switch and "Recirculation/Fresh" switch simultaneously. Hold both switches until the indicator check screen appears.





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(d) The indicator check is automatically performed when panel diagnosis is activated. Check that the indicators light up and go off 4 times at 1-second intervals continuously.





HINT
* The sensor check automatically starts when the indicator check is completed.
* Press the "OFF" switch to cancel the check mode.

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5. SENSOR CHECK (DTC CHECK)

(a) Start the engine and warm it up.

(b) Perform the indicator check.

HINT
After the indicator check is completed, the system enters DTC check mode automatically.

(c) Read the DTC displayed on the multi-display assembly*1 or the integration control and panel assembly*2.





NOTICE:
In sensor check mode, which is automatically entered after indicator check mode, troubleshooting may be partially performed. Be sure to perform the sensor check again.

HINT
Refer to Diagnostic Trouble Code Chart for details of the codes Air Conditioning System.

* When there are no problems, DTC 00 is output.
* As an example, the illustration shows that display DTC 12 is output.
* *1: w/ Navigation System

* *2: w/o Navigation System

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(d) If the steps are difficult to read because they change automatically, press the "FRONT DEF" switch to display the steps one at a time so that they can be read easily. The items are displayed step by step each time the "FRONT DEF" switch is pressed.





HINT
Press the "OFF" switch to finish panel diagnosis.

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(e) Clear the DTC

(1) During the sensor check, press the "FRONT DEF" switch and "OFF" switch simultaneously.





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