Without Scan Tool

If the self-diagnostic feature of the automatic air conditioning system detects a fault, the "°F/°C" symbol to the right of the temperature numbers on the display panel will flash. The symbol will flash only when the fault is present. At this time, the trouble code can be extracted by entering the diagnostic mode.

With the exception of DTC 09 (Low Freon Detected), trouble codes will not be stored in the microprocessor.

To enter the diagnostic mode, the "TEMP (arrow up)" switch must be pressed and held while the "OFF" switch is then pressed to enter the command (normally within 5 seconds). Upon entry into the diagnostic mode, the LCD will display any trouble codes that are present.