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Home >> Subaru >> 2017 >> Impreza Base, 4D Sedan, Standard Trans >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostics - Introduction) >> Warning Light Illumination Pattern >> Activation Of Malfunction Indicator Light
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Activation Of Malfunction Indicator Light

  1. When the ignition switch is turned to ON (engine OFF), the malfunction indicator light (A) 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) >Warning Light Illumination Pattern>MALFUNCTION INDICATOR LIGHT DOES NOT COME ON .
    Fig 1: Identifying Check Engine Indicator Light
    G10263254Courtesy 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: Diagnostic Display Pattern
    G11257275Courtesy 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: Diagnostic Display Pattern (Misfire)
G11257276Courtesy of SUBARU OF AMERICA, INC.