Function of the On-Board Diagnostic System

ON-BOARD DIAGNOSTIC SYSTEM FUNCTION
The on-board diagnostic system has the following four functions.
1. BULB CHECK: This function checks the Malfunction Indicator Lamp (MIL) bulb for damage (blown, open circuit, etc.).

2. MALFUNCTION WARNING: This is a usual driving condition. When a malfunction is detected twice (two trip detection logic), the MIL 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: This function allows diagnostic trouble codes to be read.

4. FRONT HEATED OXYGEN SENSOR MONITOR: This function allows the fuel mixture condition (lean or rich), monitored by front heated oxygen sensor, to be read.