STEP 4. Check whether the diagnostic trouble code is reset.
(1) Erase the diagnostic trouble code.
(2) Turn the power supply mode of the engine switch from OFF to ON.
(3) Check if the diagnostic trouble code is set.
Is the diagnostic trouble code set?
Replace KOS-ECU and register the ID codes (Refer to ). Intermittent malfunction is suspected (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).