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P046F, P0486 EGR PRESSURE SENSOR EC-1025 < DTC/CIRCUIT DIAGNOSIS > [MR EXCEPT FOR NISMO RS MODELS] C D E F G H I J K L M A EC N P O P046F, P0486 EGR PRESSURE SENSOR DTC Logic INFOID:0000000012198516 DTC DETECTION LOGIC NOTE: If DTC P046F, or P0486 is displayed with DTC P0643, first perform trouble diagnosis for DTC P0643. Refer to . DTC CONFIRMATION PROCEDURE 1. PRECONDITIONING If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test. 1. 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. TEST CONDITION: Before performing the following procedure, confirm that battery voltage is 10 V or more at ignition switch ON. >> GO TO 2. 2. PERFORM DTC CONFIRMATION PROCEDURE 1. Start engine and let it idle for 5 seconds. 2. Check 1st trip DTC. YES >> Proceed to EC-1025, "Diagnosis Procedure" . NO >> INSPECTION END Diagnosis Procedure INFOID:0000000012198517 1. CHECK EGR PRESSURE SENSOR POWER SUPPLY 1. Turn ignition switch OFF. 2. Disconnect EGR pressure sensor harness connector. 3. Turn ignition switch ON. 4. Check the voltage between EGR pressure sensor harness connector and ground. Is the inspection result normal? YES >> GO TO 2. NO >> Perform the trouble diagnosis for power supply circuit. 2. CHECK EGR PRESSURE SENSOR GROUND CIRCUIT 1. Turn ignition switch OFF. 2. Disconnect ECM harness connector. DTC No. Trouble diagnosis name (Trouble diagnosis content) DTC detecting condition Possible cause P046F EGR SENSOR B ECM detects that a voltage signal from • Harness or connectors (EGR pressure sensor circuit is open or • EGR pressure sensor P0486 EGR SENSOR B ECM detects that a voltage signal from + − Voltage (Approx.) EGR pressure sensor Connector Terminal F46 1 Ground 5 V |