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EC-370 < DTC/CIRCUIT DIAGNOSIS > [MR18DE] P2096, P2097 A/F SENSOR 1 3. Check the voltage between A/F sensor 1 harness connector and ground. Is the inspection result normal? YES >> GO TO 9. NO >> GO TO 8. 8. DETECT MALFUNCTIONING PART Check the following. >> Repair or replace harness or connectors. 9. CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 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 5. Also check harness for short to power. Is the inspection result normal? YES >> GO TO 10. NO >> Repair open circuit or short to ground or short to power in harness or connectors. 10. CHECK A/F SENSOR 1 HEATER EC-140, "Component Inspection" Is the inspection result normal? YES >> GO TO 11. NO >> GO TO 13. 11. CHECK HEATED OXYGEN SENSOR 2 Check heated oxygen sensor 2. Refer to EC-193, "Component Inspection" A/F sensor 1 Ground Voltage Connector Terminal F50 4 Ground Battery voltage A/F sensor 1 ECM Continuity Connector Terminal Connector Terminal F50 1 F8 49 Existed 2 53 A/F sensor 1 Ground Continuity Connector Terminal F50 1 Ground Not existed 2 ECM Ground Continuity Connector Terminal F8 49 Ground Not existed 53 |