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EC-846 [QG (WITHOUT EURO-OBD)] HO2S1 (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- Diagnostic Procedure EBS00R29 1. INSPECTION START Do you have CONSULT-II? Yes or No Yes >> GO TO 2. No >> GO TO 3. 2. CHECK OVERALL FUNCTION With CONSULT-II 1. Start engine and warm it up to normal operating temperature. 2. Select “HO2S1 MNTR (B1)” in “DATA MONITOR” mode with CONSULT-II. 3. Keep the engine speed at 2,000 rpm under no load, and make OK or NG OK >> INSPECTION END NG >> GO TO 4. 3. CHECK OVERALL FUNCTION Without CONSULT-II 1. Start engine and warm it up to normal operating temperature. 2. Set voltmeter probes between ECM terminal 35 (HO2S1 signal) and engine ground. 3. Keep the engine speed at 2,000 rpm under no load, and make OK or NG OK >> INSPECTION END NG >> GO TO 4. TERMI- NAL NO. WIRE COLOR ITEM CONDITION DATA (DC Voltage) 35 W Heated oxygen sensor 1 [Engine is running] ● Warm-up condition ● Engine speed is 2,000 rpm. 0 - Approximately 1.0V 74 B Sensors' ground [Engine is running] ● Idle speed Approximately 0V 1 time: RICH → LEAN → RICH 2 times: RICH → LEAN → RICH → LEAN → RICH SEF646Y 1 time: 0 - 0.3V → 0.6 - 1.0V → 0 - 0.3V 2 times: 0 - 0.3V → 0.6 - 1.0V → 0 - 0.3V → 0.6 - 1.0V → 0 - 0.3V MBIB0018E |