Without Scan Tool
DTC CHECK (SENSOR CHECK)a. After the indicator check is completed, the system enters the DTC check mode automatically.
b. Read the code displayed on the panel. Refer to the list of codes when reading the codes. (Trouble code are output at the temperature display.)
c. If the slower display is desired, press the FRONT DEF switch and change it to stepped operation. Each time the FRONT DEF switch is pressed, the display changes by 1 step.