Without Scan Tool

DTC CHECK (SENSOR CHECK)
a. Perform an indicator check. After the indicator check is completed, the system enters the DTC check mode automatically.
b. Read the DTC displayed on the panel. Refer to the list of DTCs.
(DTCs are out put at the temperature display.)
If the slower display is desired, press the Driver Side Temp. Control Switch and change it to step operation.
Each time the Driver Side Temp. Control switch is pressed, the display changes by 1 step.