Without Scan Tool

1. Perform an indicator check.
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. (Trouble codes are output at the temperature display.)
Diagnostic Trouble Code Descriptions





HINT:
- If the slower display is desired, press the FRS switch and change it to stepped operation. Each time the FRS switch is pressed, the display changes by 1 step.
- 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.).