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EC9-370 < DTC/CIRCUIT DIAGNOSIS > [R9M] P2244 A/F SENSOR P2244 A/F SENSOR DTC Logic INFOID:0000000010309392 DTC DETECTION LOGIC DTC CONFIRMATION PROCEDURE 1. PRECONDITIONING If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at >> GO TO 2. 2. PERFORM DTC CONFIRMATION PROCEDURE 1. Start engine and let it idle for at least 2 seconds. 2. Check DTC. Is DTC detected? YES >> Proceed to EC9-370, "Diagnosis Procedure" . NO >> INSPECTION END Diagnosis Procedure INFOID:0000000010508255 1. CHECK ECM HARNESS CONNECTOR CONNECTIONS 1. Turn ignition switch OFF. 2. Check ECM harness connector connection. Is the inspection result normal? YES >> GO TO 2. NO >> Repair or replace error-detected parts. 2. CHECK AIR FUEL RATIO (A/F) SENSOR HARNESS CONNECTOR CONNECTIONS Check A/F sensor harness connector connection. Is the inspection result normal? YES >> GO TO 3. NO >> Repair or replace error-detected parts. 3. CHECK A/F SENSOR CIRCUIT FOR OPEN AND SHORT Check A/F sensor circuit for open and short. DTC No. CONSULT screen terms (Trouble diagnosis content) DTC detecting condition Possible cause P2244 PROPOR RICH SEN CIRC TO EARTH • CC.1: SHORT-CIRCUIT TO +12V • ECM detects air fuel ratio (A/F) sensor circuit is short circuit to ground. • ECM detects air fuel ratio (A/F) sensor circuit is short circuit to battery. • Harness or connectors (A/F sensor circuit is shorted.) • A/F sensor |