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EC-198 < COMPONENT DIAGNOSIS > [VQ35HR] P0133, P0153 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 8. NO >> GO TO 7. 7. DETECT MALFUNCTIONING PART Check the following. >> Repair or replace harness or connectors. 8. 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 or ECM harness connector and ground. 5. Also check harness for short to power. Is the inspection result normal? YES >> GO TO 9. NO >> Repair open circuit or short to ground or short to power in harness or connectors. 9. CHECK AIR FUEL RATIO (A/F) SENSOR 1 HEATER EC-147, "Component Inspection" Is the inspection result normal? YES >> GO TO 10. NO >> GO TO 13. 10. CHECK MASS AIR FLOW SENSOR Check both mass air flow sensor (bank 1 and bank 2). EC-161, "Component Inspection" DTC A/F sensor 1 Ground Voltage Bank Connector Terminal P0133 1 F3 4 Ground Battery voltage P0153 2 F20 4 DTC A/F sensor 1 ECM Continuity Bank Connector Terminal Connector Terminal P0133 1 F3 1 F102 57 Existed 2 61 P0153 2 F20 1 65 2 66 DTC A/F sensor 1 ECM Ground Continuity Bank Connector Terminal Connector Terminal P0133 1 F3 1 F102 57 Ground Not existed 2 61 P0153 2 F20 1 65 2 66 |