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P1421 COLD START CONTROL EC-1397 < COMPONENT DIAGNOSIS > [VQ35DE] C D E F G H I J K L M A EC N P O • Crushed intake air passage • Intake air passage clogging YES >> GO TO 3. NO >> Repair or replace malfunctioning part 3. CHECK FUEL INJECTION SYSTEM FUNCTION Perform for DTC P0171, P0174. Is the inspection result normal? YES >> GO TO 4. NO >> Go to EC-1267, "Diagnosis Procedure" for DTC P0171, P0174. 4. PERFORM DTC CONFIRMATION PROCEDURE 1. Turn ignition switch ON. 2. Erase DTC. 3. Perform DTC CONFIRMATION PROCEDURE. . Is the 1st trip DTC P1421 displayed again? YES >> GO TO 5. NO >> INSPECTION END 5. REPLACE ECM 1. Replace ECM. 2. Go to EC-1051, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Require- . >> INSPECTION END |