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DTC P0139, P0159 HO2S2 EC-305 [VQ35DE] C D E F G H I J K L M A EC 2. CLEAR THE SELF-LEARNING DATA With CONSULT-II 1. Start engine and warm it up to normal operating temperature. 2. Select “SELF-LEARNING CONT” in “WORK SUPPORT” mode 3. Clear the self-learning control coefficient by touching “CLEAR”. 4. Run engine for at least 10 minutes at idle speed. Without CONSULT-II 1. Start engine and warm it up to normal operating temperature. 2. Turn ignition switch OFF. 3. Disconnect mass air flow sensor (1) harness connector, and 4. Stop engine and reconnect mass air flow sensor harness con- 5. Make sure DTC P0102 is displayed. 6. Erase the DTC memory. Refer to EMISSION-RELATED DIAGNOSTIC INFORMATION" . 7. Make sure DTC P0000 is displayed. 8. Run engine for at least 10 minutes at idle speed. Yes or No Yes >> Perform trouble diagnosis for DTC P0171, P0174 or P0172, P0175. Refer to P0171, P0174 FUEL INJECTION SYSTEM FUNCTION" or EC-320, "DTC P0172, P0175 FUEL 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 harness continuity between ECM terminal 78 and HO2S2 5. Also check harness for short to ground and short to power. OK or NG OK >> GO TO 4. NG >> Repair open circuit or short to ground or short to power in harness or connectors. SEF968Y PBIB2783E Continuity should exist. PBIB1576E |