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P0138 HO2S2 EC-169 < DTC/CIRCUIT DIAGNOSIS > [HR12DE (TYPE 1)] C D E F G H I J K L M A EC N P O NO >> Repair open circuit or short to ground or short to power in harness or connectors. 9. CHECK HO2S2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 1. Check the continuity between HO2S2 harness connector and ECM harness connector. 2. Check the continuity between HO2S2 harness connector or ECM harness connector and ground. 3. Also check harness for short to power. Is the inspection result normal? YES >> GO TO 10. NO >> Repair open circuit, short to ground or short to power in harness or connectors. 10. CHECK HEATED OXYGEN SENSOR 2 Check heated oxygen sensor 2. Refer to EC-169, "Component Inspection" Is the inspection result normal? YES >> GO TO 11. NO >> Replace heated oxygen sensor 2. Refer to . 11. CHECK INTERMITTENT INCIDENT Check intermittent incident. Refer to GI-33, "Intermittent Incident" . >> Repair or replace malfunctioning part. Component Inspection INFOID:0000000005989271 1. INSPECTION START Do you have CONSULT-III? YES >> GO TO 2. NO >> GO TO 3. 2. CHECK HEATED OXYGEN SENSOR 2 With CONSULT-III 1. Turn ignition switch ON and select “ENGINE” using CONSULT-III. 2. Select “DATA MONITOR” mode. 3. Start engine and warm it up to the normal operating temperature. 4. Turn ignition switch OFF and wait at least 10 seconds. 5. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load. 6. Let engine idle for 1 minute. 7. Select “FUEL INJECTION” in “ACTIVE TEST” mode, and select “HO2S2 (B1)” as the monitor item with HO2S2 ECM Continuity Connector Terminal Connector Terminal E31 4 F16 50 Existed HO2S2 ECM Ground Continuity Connector Terminal Connector Terminal E31 4 F16 50 Ground Not existed |