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P0137 HO2S2 ECM-209 < DTC/CIRCUIT DIAGNOSIS > [MR20DD] C D E F G H I J K L M A ECM N P O 3. Also check harness for short to ground and short to power. Is the inspection result normal? YES >> GO TO 4. NO >> Repair or replace malfunctioning part. 4. CHECK HEATED OXYGEN SENSOR 2 ECM-209, "Component Inspection" Is the inspection result normal? YES >> INSPECTION END NO >> GO TO 5. 5. REPLACE HEATED OXYGEN SENSOR 2 Replace malfunctioning heated oxygen sensor 2. Refer to . CAUTION: • Discard any heated oxygen 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. • Before installing new oxygen sensor, clean exhaust system threads. >> INSPECTION END Component Inspection INFOID:0000000010702929 1. INSPECTION START Will CONSULT be used? Will CONSULT be used? YES >> GO TO 2. NO >> GO TO 3. 2. CHECK HEATED OXYGEN SENSOR 2-1 WITH CONSULT 1. Select “DATA MONITOR” mode with CONSULT. 2. Start engine and warm it up to the normal operating temperature. 3. Turn ignition switch OFF and wait at least 10 seconds. 4. Restart engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no 5. Let engine idle for 1 minute. 6. Select “FUEL INJECTION” in “ACTIVE TEST” mode, and select “HO2S2 (B1)” as the monitor item with 7. Check “HO2S2 (B1)” at idle speed when adjusting “FUEL INJECTION” to ± 25%. “HO2S2 (B1)/(B2)” should be above 0.77 V at least once when the “FUEL INJECTION” is +25%. Is the inspection result normal? YES >> INSPECTION END NO >> GO TO 6. + Ground Continuity HO2S2 Connector Terminal F35 2 Ground Not existed + Ground Continuity ECM Connector Terminal F16 57 Ground Not existed |