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P0031, P0032, P0051, P0052 A/F SENSOR 1 HEATER EC-1185 < COMPONENT DIAGNOSIS > [VQ35DE] C D E F G H I J K L M A EC N P O 1. Turn ignition switch OFF. 2. Check ground connection E9. Refer to Ground Inspection in . Is the inspection result normal? YES >> GO TO 2. NO >> Repair or replace ground connection. 2. CHECK AIR FUEL RATIO (A/F) SENSOR 1 POWER SUPPLY CIRCUIT 1. Disconnect air fuel ratio (A/F) sensor 1 harness connector. 2. Turn ignition switch ON. 3. Check the voltage between A/F sensor 1 harness connector and ground. Is the inspection result normal? YES >> GO TO 4. NO >> GO TO 3. 3. DETECT MALFUNCTIONING PART Check the following. • IPDM E/R harness connector F10 • 15 A fuse (No. 37) • Harness for open or short between A/F sensor 1 and fuse >> Repair or replace harness or connectors. 4. CHECK A/F SENSOR 1 HEATER OUTPUT SIGNAL CIRCUIT 1. Turn ignition switch OFF. 2. Disconnect ECM harness connector. 3. Check harness continuity between A/F sensor 1 harness connector and ECM harness connector. 4. Also check harness for short to ground and short to power. YES >> GO TO 5. NO >> Repair open circuit, short to ground or short to power in harness or connectors. 5. CHECK A/F SENSOR 1 HEATER EC-1186, "Component Inspection" . Is the inspection result normal? YES >> GO TO 7. NO >> GO TO 6. 6. REPLACE AIR FUEL RATIO (A/F) SENSOR 1 Replace malfunctioning air fuel ratio (A/F) sensor 1. CAUTION: • Discard any A/F sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a hard surface such as a concrete floor; use a new one. DTC A/F sensor 1 Ground Voltage Bank Connector Terminal P0031, P0032 1 F12 4 Ground Battery voltage P0051, P0052 2 F61 4 PBIB3308E DTC A/F sensor 1 ECM Continuity Bank Connector Terminal Connector Terminal P0031, P0032 1 F12 3 F14 4 Existed P0051, P0052 2 F61 3 8 |