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EC-302 < DTC/CIRCUIT DIAGNOSIS > [VQ40DE] P050A, P050E COLD START CONTROL YES >> Go to NO >> INSPECTION END Diagnosis Procedure INFOID:0000000006244008 1. PERFORM IDLE AIR VOLUME LEARNING Perform EC-25, "Idle Air Volume Learning" Is Idle Air Volume Learning carried out successfully? YES >> GO TO 2. NO >> Follow the instruction of Idle Air Volume Learning. 2. CHECK INTAKE SYSTEM Check for the cause of intake air volume lacking. Refer to the following. • Crushed intake air passage • Intake air passage clogging • Clogging of throttle body YES >> GO TO 3. NO >> Repair or replace malfunctioning part 3. CHECK FUEL INJECTION SYSTEM FUNCTION Perform DTC Confirmation Procedure for DTC P0171, P0174. Refer to EC-185, "DTC Confirmation Proce- . Is the inspection result normal? YES >> GO TO 4. NO >> Go to for DTC P0171, P0174. 4. PERFORM DTC CONFIRMATION PROCEDURE 1. Turn ignition switch ON. 2. Erase DTC. 3. Perform DTC Confirmation Procedure. EC-301, "DTC Confirmation Procedure" Is the 1st trip DTC P050A or P050E displayed again? YES >> GO TO 5. NO >> INSPECTION END 5. REPLACE ECM 1. Replace ECM. 2. Go to EC-24, "Procedure After Replacing ECM" . >> INSPECTION END 2011 Pathfinder |