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P0139, P0159 HO2S2 EC-631 < COMPONENT DIAGNOSIS > [VQ40DE] C D E F G H I J K L M A EC N P O Perform component function check. Refer to EC-631, "Overall Function Check" . NOTE: Is the inspection result normal? YES >> INSPECTION END NO >> Proceed to Overall Function Check INFOID:0000000005273602 Use this procedure to check the overall function of the heated oxygen sensor 2 circuit. During this check, a 1st WITH GST 1. Start engine and warm it up to the normal operating temperature. 2. Turn ignition switch OFF and wait at least 10 seconds. 3. Turn ignition switch ON. 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. Set voltmeter probes between ECM terminal 74 [HO2S2 (B1) signal] or 55 [HO2S2 (B2) signal] and 8. Check the voltage when revving up to 4,000 rpm under no load 9. Keep vehicle at idling for 10 minutes, then check the voltage. Or 10. If NG, go to Diagnosis Procedure INFOID:0000000005273603 1. CHECK GROUND CONNECTIONS 1. Turn ignition switch OFF. 2. Loosen and retighten three ground screws on the body. Refer to OK or NG OK >> GO TO 2. NG >> Repair or replace ground connections. 2. CLEAR THE SELF-LEARNING DATA With CONSULT-III PBIB1607E BBIA0539E |