Check Mode Procedure

LIST OF OPERATION METHODS
1. By operating each of the A/C control switches as shown in the diagram below, it is possible to enter the diagnostic check mode.
  
  Fig 1: Check Mode Flow Procedure
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INDICATOR CHECK
1. Turn the engine switch off.
2. Turn the engine switch on (IG) while pressing the A/C control "AUTO" switch and "R/F" switch simultaneously.
  
  Fig 2: Pressing A/C Control Auto Switch
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. 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.
  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.
DTC CHECK (SENSOR CHECK)
1. Start the engine and warm it up.
2. Perform the indicator check.
  HINT:
  
  After the indicator check is completed, the system enters the DTC check mode automatically.
  
  Fig 3: Identifying Blinking Pattern
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Push the "R/F" switch to perform the actuator check.
  NOTE:
  - In the sensor check mode, which is automatically transferred from the indicator check mode, troubleshooting may be partially performed. Be sure to perform the actuator check, and then the sensor check again.
  - If the check is performed in a dark place, DTC 21 may be displayed.
  HINT:
  
  When there are no problems, DTC 00 is output.
4. If the steps are difficult to read because they change automatically, push the "UPDr" 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 "UPDr" switch is pushed.
5. Read the code displayed on the panel.
  HINT:
  
  Refer to the DTC chart (Diagnostic Trouble Code chart) for details of the codes (See DIAGNOSTIC TROUBLE CODE CHART ).
  - Push the "OFF" switch to finish panel diagnosis.
  - Push the "R/F" switch to enter the actuator check mode.
    
    Fig 4: Identifying Control Panel (R/F (Recirculation/Fresh)" Switch)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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.

Fig 5: Identifying Control Panel (R/F (Recirculation/Fresh)" Switch)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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.
As an example, the illustration shows that display code 21 is output.
Push the "OFF" switch to finish panel diagnosis.
Push the "AUTO" switch to enter the sensor check mode.

Fig 6: Pushing "Off" Switch
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

DISPLAY CODES DESCRIPTION

Step No.	Display Code	Conditions
Step No.	Display Code	Blower Level	Air Mix Damper	Airflow Vent	Air Inlet Damper	Cool Air Bypass Damper	Compressor
1	0	0	0 % open	FACE	FRESH	-14 %	OFF
2	1	1	0 % open	FACE	FRESH	-14 %	OFF
3	2	17	0 % open	FACE	RECIRCULATION / FRESH	-14 %	ON
4	3	17	0 % open	FACE	RECIRCULATION	113.50%	ON
5	4	17	50 % open	B/L	RECIRCULATION	113.50%	ON
6	5	17	50 % open	B/L	RECIRCULATION	113.50%	ON
7	6	17	50 % open	FOOT	FRESH	113.50%	ON
8	7	17	100% open	FOOT-0	FRESH	113.50%	ON
9	8	17	100 % open	F/D	FRESH	113.50%	ON
10	9	31	100 % open	DEF	FRESH	113.50%	ON

If the steps are difficult to read because they change automatically, push the "UPDr" 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 "UPDr" switch is pushed.
HINT:
- Push the "OFF" switch to finish the panel diagnosis.
- Push the "R/F" switch to enter the sensor check mode.