Malfunction Indicator Lamp

The malfunction indicator lamp is located on the instrument panel.

1. The malfunction indicator lamp will light up when the ignition switch is turned ON without the engine running. This is a bulb check.

2. When the engine is started, the malfunction indicator lamp should go off.
If the lamp remains on, the on board diagnostic system has detected an engine system malfunction.

ON BOARD DIAGNOSTIC SYSTEM FUNCTION
The on board diagnostic system has the following four functions.

Diagnostic Test Mode I

1. BULB CHECK:
This function checks the bulb for damage (blown, open circuit, etc.) of the malfunction indicator lamp.
If the MIL does not come on, check MIL circuit and ECM test mode.

2. MALFUNCTION WARNING:
This is a usual driving condition. When a malfunction is detected twice in two consecutive driving cycles (2 trip detection logic), the MIL will light up to inform the driver that a malfunction has been detected.
The following malfunctions will light up or blink the MIL in the 1st trip.
- "Misfire (possible three way catalyst damage)"
- "Closed loop control"
- Fail-safe mode

Diagnostic Test Mode II

1. SELF-DIAGNOSTIC RESULTS:
This function allows DTCs and 1st trip DTCs to be read.
In this mode, the DTC and 1st trip DTC are indicated by the number of blinks of the MALFUNCTION INDICATOR LAMP.

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




HOW TO SWITCH DIAGNOSTIC TEST MODES