Without Scan Tool

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 diagnosis check mode.

INDICATOR CHECK





1. Turn the ignition switch on while pressing the air conditioning control AUTO switch and FIR switch simultaneously.





2. Check that all the indicators light up and go off at 1 second intervals 4 times in succession.
3. Check that the buzzer sounds when the indicators light up in 2.

HINT:
- After the indicator check is ended, the diagnostic trouble code check begins automatically.
- Press the OFF switch when desiring to cancel the check mode.

DIAGNOSTIC TROUBLE CODE CHECK (SENSOR CHECK)
1. Perform an indicator check. After the indicator check is completed, the system enters the diagnostic trouble code check mode automatically.





2. Read the code displayed on the panel. Refer to the list of codes in the Diagnostic Trouble Code Chart when reading the codes. (Trouble codes are output at the temperature display.)





If the slower display is desired, press the down switch and change it to stepped operation. Each time the switch is pressed, the display changes by 1 step.

HINT:
- If the buzzer sounds when a trouble code is being read, it means the trouble indicated by that trouble code continues to occur.
- If the buzzer does not sound when a trouble code is being read, it means the trouble indicated by that trouble code occurred earlier (such as poor connector contacts, etc.).





ACTUATOR CHECK





1. After entering the diagnostic trouble code check mode (sensor check mode) press the F/R switch.
2. Since each damper, motor and relay automatically operates at 1 second intervals beginning in order from 20 in the temperature display, check the temperature and air flow visually and by hand.

If the slower display is desired, press the switch and change it to step operation. Each time the switch is pressed, the display changes by 1 step.





HINT:
- The buzzer sounds when the display trouble code changes.
- Code are displayed in order from the smaller to the larger numbers.
- To cancel the check mode, press the OFF switch.