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EC-278 [QG (WITH EURO-OBD)] DTC P0139, P0159 HO2S2 (A/T MODELS) 4. CHECK HO2S2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 1. Check harness continuity between ECM terminal and HO2S2 terminal as follows. 2. Check harness continuity between the following terminals and ground. 3. Also check harness for 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 HEATED OXYGEN SENSOR 2 Refer to EC-278, "Component Inspection" . OK or NG OK >> GO TO 6. NG >> Replace heated oxygen sensor 2. 6. CHECK INTERMITTENT INCIDENT Refer to EC-138, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" . >> INSPECTION END Component Inspection EBS00QLL HEATED OXYGEN SENSOR 2 With CONSULT-II 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 one minute under no 4. Let engine idle for one minute. DTC Terminals Bank ECM Sensor P0139 16 2 1 P0159 17 2 2 Continuity should exist. DTC Terminals Bank ECM Sensor P0139 16 2 1 P0159 17 2 2 Continuity should not exist. |