Activation Of Check Engine Malfunction Indicator Lamp (Mil)

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When ignition switch is turned to ON (engine off), the CHECK ENGINE malfunction indicator lamp (MIL) in the combination meter illuminates.
NOTE: If the MIL does not illuminate, perform diagnostics of the CHECK ENGINE light circuit or the combination meter circuit. < Ref. to CHECK ENGINE MALFUNCTION INDICATOR LAMP (MIL) DOES NOT COME ON. . >

Fig 1: Identifying Engine Malfunction Indicator Lamp
Courtesy of SUBARU OF AMERICA, INC.
After starting the engine, the MIL goes out. If it does not, either the engine or the emission control system is malfunctioning.

Fig 2: Engine Malfunction Indicator Lamp Blinking Pattern
Courtesy of SUBARU OF AMERICA, INC.
If the diagnosis system senses a misfire which could damage the catalyzer, the MIL will blink at a cycle of 1 Hz.

Fig 3: Engine Malfunction Indicator Lamp Blinking Pattern
Courtesy of SUBARU OF AMERICA, INC.
When ignition switch is turned to ON (engine off) or to "START" with the test mode connector connected, the MIL blinks at a cycle of 3 Hz.

Fig 4: Engine Malfunction Indicator Lamp Blinking Pattern
Courtesy of SUBARU OF AMERICA, INC.