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EC-238 < DTC/CIRCUIT DIAGNOSIS > [HR16DE] P0139 HO2S2 8. Check “HO2S2 (B1)” at idle speed when adjusting “FUEL INJECTION” to ±25%. : “HO2S2 (B1)” should be above 0.78 V at least once when the “FUEL INJECTION” is +25%. −25%. Is the inspection result normal? YES >> INSPECTION END NO >> GO TO 6. 3. CHECK HEATED OXYGEN SENSOR 2-I Without CONSULT 1. Start engine and warm it up to the normal operating temperature. 2. Turn ignition switch OFF and wait at least 10 seconds. 3. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load. 4. Let engine idle for 1 minute. 5. Check the voltage between ECM harness connector terminals under the following condition. Is the inspection result normal? YES >> INSPECTION END NO >> GO TO 4. 4. CHECK HEATED OXYGEN SENSOR 2-II Check the voltage between ECM harness connector terminals under the following condition. Is the inspection result normal? YES >> INSPECTION END NO >> GO TO 5. 5. CHECK HEATED OXYGEN SENSOR 2-III Check the voltage between ECM harness connector terminals under the following condition. JSBIA3451ZZ ECM Condition Voltage Connector + – Terminal Terminal F11 50 (HO2S2) 59 Revving up to 3,600 rpm under no load at The voltage should be above 0.78 V at ECM Condition Voltage Connector + – Terminal Terminal F11 50 (HO2S2) 59 Keeping engine at idle for 10 minutes The voltage should be above 0.78 V at |