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EC-818 [QG (WITHOUT EURO-OBD)] HO2S1 HEATER (M/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 EBS00R1G 1. CHECK OVERALL FUNCTION CHECK 1. Start engine and warm it up to normal operating temperature. 2. Turn ignition switch “OFF” and wait at least 10 seconds. 3. Turn ignition switch “ON”. 4. Set the tester probe between ECM terminal 24 (HO2S1 heater signal) and ground. 5. Start engine and let it idle. 6. Check the voltage under the following conditions. : Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.) OK or NG OK >> INSPECTION END. NG >> GO TO 2. TER- MINA L NO. WIRE COLOR ITEM CONDITION DATA (DC Voltage) 24 G Heated oxygen sensor 1 [Engine is running] ● Warm-up condition. ● Engine speed is below 3,600 rpm. Approximately 7.0V [Ignition switch “ON”] ● Engine stopped. [Engine is running] ● Engine speed is above 3,600 rpm. BATTERY VOLTAGE PBIB0519E Conditions Voltage At idle Approximately 7.0V Engine speed is above 3,600 rpm BATTERY VOLTAGE (11 - 14V) MBIB0038E PBIB0519E |