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EC-356 < DTC/CIRCUIT DIAGNOSIS > [QR25DE] P0506 ISC SYSTEM NO >> INSPECTION END Diagnosis Procedure INFOID:0000000011278065 1. CHECK DTC PRIORITY If DTC P0506 is displayed with other DTC, first perform the trouble diagnosis for other DTC. YES >> Perform diagnosis of applicable. Refer to . NO >> GO TO 2. 2. CHECK INTAKE AIR LEAK 1. Start engine and let it idle. 2. Listen for an intake air leak after the mass air flow sensor. YES >> Discover air leak location and repair. NO >> Replace ECM. Refer to |