Climate Control Diagnostic Trouble Code Number Inspection

DIAGNOSTIC TROUBLE CODE NUMBER INSPECTION [L3 WITH TC]
1. Remove the glove compartment.
2. Short the A/C check connector to the GND terminal using a jumper wire.




3. Expose the solar radiation sensor to natural sunlight.

NOTE: If natural sunlight is not shone on the solar radiation sensor, the climate control unit determines a malfunction and indicates DTC

4. Turn the ignition switch to ON position.
5. Read DTCs from the flashing of the defroster indicator light on the climate control unit. Carry out DTC inspection. (Present and past failure indication modes)
- When the system is normal, the defroster indicator light does not flash.
- If any of the diagnostic trouble codes are indicated, carry out troubleshooting according to the code.

6. After completion of repairs, erase all diagnostic trouble code(s) from memory. (See Erasing Past Failure Memory.)
7. Remove the jumper wire.

Present Failure Indication Mode
- The on-board diagnostic function displays the present failure indication mode directly after start up. In present failure indication mode, present failures in the control system circuits (open, short circuits) are detected, and the flashing of the defroster indicator light on the climate control unit indicates the DTCs.
- If a diagnostic trouble code is indicated, refer to the diagnostic trouble code table Diagnostic Trouble Code Descriptions and inspect the appropriate system.

Past Failure Indication Mode
- While in present failure indication mode, press the A/C switch to change to the past failure indication mode. In past failure indication mode, past failures (intermittent problems) in the input sensor circuits (open, short circuits) are stored, and the flashing of the defroster indicator light on the climate control unit indicates the DTCs.
- If a diagnostic trouble code is indicated, refer to the DTC table Diagnostic Trouble Code Descriptions and inspect the appropriate system. (Disconnections and short circuits are stored in the same system even if either occurs only once.)
- If the A/C switch is pressed again while in past failure indication mode, the on-board diagnostic function will return to present failure indication mode.