Diagnosis System
WARNING: This page is about a different car, the 2012 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.
- DESCRIPTION
- Air conditioning system data and the 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.
- CHECK DLC3
- Check the DLC3. Refer to GENERAL INFORMATION .
- LIST OF OPERATION METHODS
- By operating each of the air conditioning control switches as shown in the diagram below, it is possible to enter the diagnostic check mode.
- INDICATOR CHECK
- Turn the ignition switch off.
- Turn the ignition switch to ON while pressing the A/C control assembly "AUTO" switch and "R/F" switch simultaneously. Hold both switches until the indicator check screen appears.
- The indicator check is automatically performed when panel diagnosis is activated. Check that the indicators light up and go off at 1 second intervals 4 times in succession.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
HINT:
- The sensor check automatically starts when the indicator check is completed.
- Press the "OFF" switch to cancel the check mode.
- If a navigation system is installed, the indicator will blink and the buzzer will sound.
- SENSOR CHECK (DTC CHECK)
- Start the engine and warm it up.
- Perform the indicator check.
HINT:
After the indicator check is completed, the system enters the DTC check mode automatically.
- Read the DTC displayed on the panel.
NOTE:
- In the sensor check mode, which is automatically entered after indicator check mode, troubleshooting may be partially performed. Be sure to perform the actuator and sensor checks again.
- If the check is performed in a dark place, DTC 21 may be displayed even though the system is normal.
HINT:
Refer to the DTC chart (Diagnostic Trouble Code chart) for details of the codes. Refer to DIAGNOSTIC TROUBLE CODE CHART .
- When there are no problems, DTC 00 is output.
- As an example, the illustration shows that display code 21 is output.
- If the steps are difficult to read because they change automatically, push the "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 "DEF" switch is pushed.
- Push the "OFF" switch to finish panel diagnosis.
- Push the "R/F" switch to enter the actuator check mode.
- Clear the DTC
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- During the sensor check, press the "DEF" switch and "REAR DEF" switch at the same time.
- ACTUATOR CHECK
- Start the engine and warm it up.
- Perform the indicator check.
- Push the "R/F" switch to perform the actuator check.
HINT:
Be sure to perform the actuator check after starting the engine.
- As the actuator check is repeated from steps 1 to 10 at 1 second intervals, check the temperature and air flow visually and by hand.
HINT:
- The display blinks at 1 second intervals in the step operation.
- Push the "OFF" switch to finish panel diagnosis.
- Push the "AUTO" switch to enter the sensor check mode.
Step No. Display Code Condition Blower Level Air Mix Damper Airflow Vent Air Inlet Damper Compressor 1 0 0 0% open FACE FRESH OFF 2 1 1 0% open FACE FRESH OFF 3 2 17 0% open FACE RECIRCULATION/FRESH ON 4 3 17 0% open FACE RECIRCULATION ON 5 4 17 50% open B/L RECIRCULATION ON 6 5 17 50% open B/L RECIRCULATION ON 7 6 17 50% open FOOT FRESH ON 8 7 17 100% open FOOT-0 FRESH ON 9 8 17 100% open F/D FRESH ON 10 9 31 100% open DEF FRESH ON - If the steps are difficult to read because they change automatically, push the "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 "DEF" switch is pushed.
HINT:
- Push the "OFF" switch to finish panel diagnosis.
- Push the "R/F" switch to enter the sensor check mode.