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P0507 ISC SYSTEM EC-349 < DTC/CIRCUIT DIAGNOSIS > [VQ35HR] C D E F G H I J K L M A EC N P O P0507 ISC SYSTEM Description INFOID:0000000005236934 The ECM controls the engine idle speed to a specified level through the fine adjustment of the air, which is let DTC Logic INFOID:0000000005236935 DTC DETECTION LOGIC NOTE: DTC CONFIRMATION PROCEDURE 1. PRECONDITIONING If DTC Confirmation Procedure has been previously conducted, always perform the following procedure Turn ignition switch OFF and wait at least 10 seconds. 2. Turn ignition switch ON. 3. Turn ignition switch OFF and wait at least 10 seconds. If the target idle speed is out of the specified value, perform EC-25, "IDLE AIR VOLUME LEARNING : , before conducting DTC Confirmation Procedure. TESTING CONDITION: − 10 ° C(14 ° F). >> GO TO 2. 2. PERFORM DTC CONFIRMATION PROCEDURE 1. Start engine and warm it up to normal operating temperature. 2. Turn ignition switch OFF and wait at least 10 seconds. 3. Turn ignition switch ON. 4. Turn ignition switch OFF and wait at least 10 seconds. 5. Start engine and run it for at least 1 minute at idle speed. 6. Check 1st trip DTC. Is 1st trip DTC detected? YES >> Go to NO >> INSPECTION END Diagnosis Procedure INFOID:0000000005236936 1. CHECK PCV HOSE CONNECTION Confirm that PCV hose is connected correctly. Is the inspection result normal? YES >> GO TO 2. DTC No. Trouble diagnosis name DTC detecting condition Possible cause P0507 Idle speed control sys- The idle speed is more than the target idle • Electric throttle control actuator |