Entering Diagnostic Mode (Self Diagnosis)

ON BOARD DIAGNOSTIC SYSTEM FUNCTION
The on board diagnostic system has the following four functions.
1. BULB CHECK : This function checks the bulb for damage (blown, open circuit, etc.) of the malfunction indicator lamp.
2. MALFUNCTION WARNING : This is a usual driving condition. When a malfunction is detected twice (2 trip detection logic), the malfunction indicator lamp will light up to inform the driver that a malfunction has been detected.
Only the following malfunctions will light up or blink the MIL even in the
1st trip.
- "Misfire (possible three way catalyst damage)"
- "Three way catalyst function
- "Closed loop control"
3. SELF-DIAGNOSTIC RESULTS : By using this function, the diagnostic trouble codes can be read.
4. FRONT HEATED OXYGEN SENSOR MONITOR : In this mode, the fuel mixture condition (lean or rich) monitored by front heated oxygen sensor can be read.