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DTC P0300, P0301, P0302, P0303, P0304, P0305, P0306 MULTIPLE CYLINDER MISFIRE, NO. 1 - 6 CYLINDER MISFIRE EC-313 < SERVICE INFORMATION > [VQ35DE] C D E F G H I J K L M A EC N P O NG >> Follow the 14. CHECK AIR FUEL RATIO (A/F) SENSOR 1 INPUT SIGNAL 1. Turn ignition switch OFF. 2. Disconnect A/F sensor 1 harness connector. 3. Disconnect ECM harness connector. 4. Check harness continuity between the following terminals. 5. Check harness continuity between the following terminals and ground. 6. Also check harness for short to power or short to ground. OK or NG OK >> GO TO 15. NG >> Repair open circuit or short to ground or short to power in harness or connectors. 15. CHECK AIR FUEL RATIO (A/F) SENSOR 1 HEATER EC-158, "Component Inspection" OK or NG OK >> GO TO 16. NG >> Replace malfunctioning air fuel ratio (A/F) sensor 1. 16. CHECK MASS AIR FLOW SENSOR A/F sensor 1 terminal ECM terminal Bank 1 1 16 2 75 5 35 6 56 Bank 2 1 76 2 77 5 57 6 58 Continuity should exist. Bank 1 Bank 2 A/F sensor 1 terminal ECM terminal A/F sensor 1 terminal ECM terminal 1 16 1 76 2 75 2 77 5 35 5 57 6 56 6 58 Continuity should not exist. PBIB2093E |