Displaying & Reading Trouble Codes

RETRIEVING DTC's





1. LIST OF OPERATION METHODS
By operating each of the A/C control switches as shown in the diagram above, it is possible to enter the diagnosis check mode.

2. INDICATOR CHECK





(a) Turn the ignition switch on while pressing the A/C control AUTO switch and R/F SW simultaneously.





(b) Check that all the indicators light up and go off at 1 second intervals 4 times in succession.

HINT:
- After the indicator check is ended, the diagnostic sensor check begins automatically.
- Press the OFF switch when cancelling the check mode.

3. DIAGNOSTIC SENSOR CHECK
(a) Perform an indicator check. After the indicator check is completed, the system enters the diagnostic sensor check mode automatically.





(b) Check the LED blinking on the panel. Refer to the list of codes under Diagnostic Trouble Code Descriptions when translating the trouble code from the LED blinking.
If the slower display is desired, press the RDEF switch and change it to step operation. Each time the RDEF switch is pressed, the blinking LED changes by 1 step.

4. ACTUATOR CHECK





(a) After entering the sensor check mode, press the R/F switch.








(b) Turn the temperature set dial and change it to step operation. Each time the dial is turned, the actuator operation changes by 1 step.

HINT:
- Check the change of actuator operation visually and by hand.
- To cancel the check mode, press the OFF switch.