|
|
EC-222 < DTC/CIRCUIT DIAGNOSIS > [HR16DE] P0137 HO2S2 Check the voltage between ECM harness connector terminals under the following condition. Is the inspection result normal? YES >> INSPECTION END NO >> Go to Diagnosis Procedure INFOID:0000000009020737 1. HECK GROUND CONNECTION 1. Turn ignition switch OFF. 2. Check ground connection E15. Refer to Ground Inspection in . Is the inspection result normal? YES >> GO TO 2. NO >> Repair or replace ground connection. 2. CLEAR THE MIXTURE RATIO SELF-LEARNING VALUE 1. Clear the mixture ratio self-learning value. Refer to . 2. Run engine for at least 10 minutes at idle speed. YES >> Perform trouble diagnosis for DTC P0171. Refer to . NO >> GO TO 3. 3. CHECK HO2S2 GROUND CIRCUIT FOR OPEN AND SHORT 1. Turn ignition switch OFF. 2. Disconnect heated oxygen sensor 2 harness connector. 3. Disconnect ECM harness connector. 4. Check the continuity between HO2S2 harness connector and ECM harness connector. 5. Also check harness for short to ground and short to power. YES >> GO TO 4. NO >> Repair open circuit, 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 ground or ECM harness connector and ground. ECM Condition Voltage Connector + – Terminal Terminal F11 50 (HO2S2) 59 Coasting from 80 km/h (50 MPH) in D position (CVT), 4th The voltage should be above 0.78 V HO2S2 ECM Continuity Connector Terminal Connector Terminal E63 1 F11 59 Existed HO2S2 ECM Continuity Connector Terminal Connector Terminal E63 4 F11 50 Existed HO2S2 Ground Continuity Connector Terminal E63 4 Ground Not existed |