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EC-162 [QG (WITH EURO-OBD)] DTC P0031, P0032, P0051, P0052 HO2S1 HEATER (A/T MODELS) Specification data are reference values and are measured between each terminal and ground. CAUTION: Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam- : Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.) Diagnostic Procedure EBS00QI4 1. CHECK HO2S1 POWER SUPPLY CIRCUIT 1. Turn ignition switch “OFF”. 2. Disconnect heated oxygen sensor 1 harness connector. 3. Turn ignition switch “ON”. 4. Check voltage between HO2S1 terminal 4 and ground with OK or NG OK >> GO TO 3. NG >> GO TO 2. TER- MINAL NO. WIRE COLOR ITEM CONDITION DATA (DC Voltage) 25 R/B Heated oxygen sensor 1 [Engine is running] ● Warm-up condition. ● Engine speed is below 3,200 rpm Approximately 7.0V [Ignition switch “ON”] ● Engine stopped. [Engine is running] ● Engine speed is above 3,200 rpm BATTERY VOLTAGE PBIB0519E MBIB0092E Voltage: Battery voltage PBIB0541E |