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EC-426 [QG (WITH EURO-OBD)] DTC P1144 HO2S1 (M/T MODELS) ● Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread 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. Check the following with engine speed held at 2,000 rpm con- ● The voltage fluctuates between 0 to 0.3V and 0.6 to 1.0V ● The maximum voltage is over 0.6V at least one time. ● The minimum voltage is below 0.3V at least one time. ● The voltage never exceeds 1.0V. 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 CAUTION: ● Discard any heated oxygen sensor which has been dropped ● Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread Removal and Installation EBS00QQA HEATED OXYGEN SENSOR 1 Refer to EM-21, "EXHAUST MANIFOLD AND CATALYTIC CONVERTER" . MBIB0018E |