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P0130 A/F SENSOR 1 EC-873 < 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 4. Check the voltage between A/F sensor 1 harness connector and ground. Is the inspection result normal? YES >> GO TO 3. NO >> GO TO 2. 2. CHECK AIR FUEL RATIO (A/F) SENSOR 1 POWER SUPPLY CIRCUIT 1. Turn ignition switch OFF. 2. Disconnect IPDM E/R harness connector. 3. Check the continuity between A/F sensor 1 harness connector and IPDM E/R harness connector. 4. Also check harness for short to ground. YES >> Perform the trouble diagnosis for power supply circuit. NO >> Repair or replace error-detected parts. 3. CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT 1. Turn ignition switch OFF. 2. Disconnect ECM harness connector. 3. Check the continuity between A/F sensor 1 harness connector and ECM harness connector. 4. Check the continuity between A/F sensor 1 harness connector and ground, or ECM harness connector and ground. 5. Also check harness for short to power. + − Voltage A/F sensor 1 Connector Terminal F72 4 Ground Battery voltage + − Continuity A/F sensor 1 IPDM E/R Connector Terminal Connector Terminal F72 4 E14 36 Existed + − Continuity A/F sensor 1 ECM Connector Terminal Connector Terminal F72 1 F24 79 Existed 2 74 + − Continuity A/F sensor 1 Connector Terminal F72 1 Ground Not existed 2 + − Continuity ECM Connector Terminal F24 74 Ground Not existed 79 |