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EC-202 < DTC/CIRCUIT DIAGNOSIS > [VQ40DE] P0130, P0150 A/F SENSOR 1 2. Loosen and retighten three ground screws on the body. Refer to OK or NG OK >> GO TO 2. NG >> Repair or replace ground connections. 2. CHECK AIR FUEL RATIO (A/F) SENSOR 1 POWER SUPPLY CIRCUIT 1. Disconnect A/F sensor 1 harness connector. 2. Turn ignition switch ON. 3. Check voltage between A/F sensor 1 terminal 4 and ground with CONSULT or tester. OK or NG OK >> GO TO 4. NG >> GO TO 3. 3. DETECT MALFUNCTIONING PART Check the following. • Harness connectors E2, F32 • IPDM E/R harness connector E119 • 15A fuse (No. 54) • Harness for open or short between A/F sensor 1 and fuse >> Repair or replace harness or connectors. 4. CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 1. Turn ignition switch OFF. 2. Disconnect ECM harness connector. 3. Check harness continuity between A/F sensor 1 terminal and ECM terminal as follows. Refer to Wiring Diagram. BBIA0539E Voltage: Battery voltage BBIA0544E A/F sensor 1 terminal ECM terminal Bank1 1 69 2 73 Bank 2 1 77 2 81 |