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DTC P0300 - P0306 MULTIPLE CYLINDER MISFIRE, NO. 1 - 6 CYLINDER MIS- FIRE EC-255 C D E F G H I J K L M A EC Revision: 2004 November 2004 Murano 11. CHECK 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. OK or NG OK >> GO TO 12. NG >> Repair open circuit or short to ground or short to power in harness or connectors between ECM and A/F sensor 1. 12. CHECK A/F SENSOR 1 HEATER Refer to EC-372, "Component Inspection" OK or NG OK >> GO TO 13. NG >> Replace (malfunctioning) A/F sensor 1. ECM terminal A/F sensor 1 terminal Bank 1 16 1 35 5 56 6 75 2 Bank 2 76 1 57 5 58 6 77 2 Continuity should exist. Bank 1 Bank 2 ECM terminal A/F sensor 1 terminal ECM terminal A/F sensor 1 terminal 16 1 76 1 35 5 57 5 56 6 58 6 75 2 77 2 Continuity should not exist. PBIB2293E |