|
|
P0138, P0158 HO2S2 EC-221 < COMPONENT DIAGNOSIS > [VQ37VHR] C D E F G H I J K L M A EC N P O Diagnosis Procedure INFOID:0000000001734053 1. INSPECTION START Confirm the detected malfunction (A or B). Refer to . Which malfunction is detected? A >> GO TO 2 B >> GO TO 9. 2. CHECK GROUND CONNECTION 1. Turn ignition switch OFF. 2. Check ground connection M95. Refer to Ground Inspection in Is the inspection result normal? YES >> GO TO 3. NO >> Repair or replace ground connection. 3. CHECK HO2S2 GROUND CIRCUIT FOR OPEN AND SHORT 1. Disconnect heated oxygen sensor 2 harness connector. 2. Disconnect ECM harness connector. 3. Check the continuity between HO2S2 harness connector and ECM harness connector. 4. Also check harness for short to ground and short to power. Is the inspection result normal? YES >> GO TO 4. NO >> Repair open circuit or short to ground or short to power in harness or connectors. 4. 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 5. NO >> Repair open circuit or short to ground or short to power in harness or connectors. 5. CHECK HO2S2 CONNECTOR FOR WATER Check connectors for water. Is the inspection result normal? DTC HO2S2 ECM Continuity Bank Connector Terminal Connector Terminal P0138 1 F54 1 F102 84 Existed P0158 2 F53 1 DTC HO2S2 ECM Continuity Bank Connector Terminal Connector Terminal P0138 1 F54 4 F102 76 Existed P0158 2 F53 4 80 DTC HO2S2 ECM Ground Continuity Bank Connector Terminal Connector Terminal P0138 1 F54 4 F102 76 Ground Not existed P0158 2 F53 4 80 Water should not exist. |