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DTC P1272, P1282 A/F SENSOR 1 EC-499 C D E F G H I J K L M A EC
2005 Pathfinder 4. CHECK AIR FUEL RATIO (A/F) SENSOR 1 INPUT SIGNAL CIRCUIT 1. Turn ignition switch OFF. 2. Disconnect ECM harness connector. 3. Check harness continuity between the following terminals. 4. Check harness continuity between the following terminals and ground. 5. Also check harness for short to ground and short to power. OK or NG OK >> GO TO 5. NG >> Repair open circuit or short to ground or short to power in harness or connectors. 5. CHECK INTERMITTENT INCIDENT Perform EC-158, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" . OK or NG OK >> GO TO 6. NG >> Repair or replace. 6. REPLACE AIR FUEL RATIO (A/F) SENSOR 1 Replace air fuel ratio (A/F) sensor 1. CAUTION: ● Discard any air fuel ratio (A/F) sensor which has been dropped from a height of more than 0.5 m ● Before installing new air fuel ratio (A/F) sensor, clean exhaust system threads using Heated Oxy- >> INSPECTION END A/F sensor 1 terminal ECM terminal Bank1 1 16 2 75 5 35 6 56 Bank 2 1 76 2 77 5 57 6 58 Continuity should exist. Bank 1 Bank 2 A/F sensor 1 terminal ECM terminal A/F sensor 1 terminal ECM terminal 1 16 1 76 2 75 2 77 5 35 5 57 6 56 6 58 Continuity should not exist. |