Activation Of Malfunction Indicator Light

1. When the ignition switch is turned to ON (engine OFF), the malfunction indicator light in the combination meter illuminates.
   NOTE: If the malfunction indicator light does not illuminate, perform diagnostics of the malfunction indicator light circuit or the combination meter circuit. Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>Malfunction Indicator Light>MALFUNCTION INDICATOR LIGHT DOES NOT COME ON .
   Fig 1: Check Engine Malfunction Indicator Lamp

   Courtesy of SUBARU OF AMERICA, INC.
2. After starting the engine, the malfunction indicator light goes out. If it does not go off, any of the engine and emission control system has malfunction.
   Fig 2: Malfunction Indicator Lamp Timing Pattern (Emission Control System Malfunction)

   Courtesy of SUBARU OF AMERICA, INC.
3. If the diagnostic system detects a misfire which could damage the catalyst, the malfunction indicator light will blink at a cycle of 1 Hz.

Fig 3: Malfunction Indicator Lamp Timing Pattern (Diagnostic System Misfire)

Courtesy of SUBARU OF AMERICA, INC.