[ Model - ECLIPSE CROSS / Year - 2018 ]
OXYGEN SENSOR CHECK
2018 / ECLIPSE CROSS / EC - Workshop Manual
13 -FUEL > 13A-DIRECT INJECTION AND MULTIPOINT FUEL INJECTION (DI AND MPI) > ON-VEHICLE SERVICE > OXYGEN SENSOR CHECK
 
 
OXYGEN SENSOR (REAR)
cautionDrive test must be performed, while two persons are onboard, in a place where a full-throttle accelerating drive can be attempted safely.
 
1. Disconnect the oxygen sensor (rear) connector and connect the special tool test harness (MB991658) to the connector on the oxygen sensor (rear) side.
 
 
2. Measure the resistance between terminal No. 1 and No. 2 of the oxygen sensor (rear) connector.
Standard value: 4.5 - 8.0 Ω (at 20°C)
3. If the resistance deviates from the standard value, replace the oxygen sensor (rear).
4. Warm up the engine until the engine coolant temperature is 80°C or higher.
5. Drive at 50 km/h or more for 10 minutes.
6. Connect the digital voltmeter between terminal No. 3 and No. 4.
7. Measure the output voltage of the oxygen sensor (rear) under the following driving.
  • Transmission: 2nd
  • Drive with wide open throttle
  • Engine: 3,500 r/min or more
Standard value:
 
Oxygen sensor output voltageRemarks
0.6 - 1.0 VHigh load operation makes air/fuel ratio richer and normal oxygen sensor (rear) also can output voltage of 0.6 - 1.0 V
noteIf the temperature of sensing area does not reach the high temperature (of approximately 400°C or more) even though the oxygen sensor (rear) is normal, the output voltage would be possibly low in spite of the rich air-fuel ratio.
noteWhen the vehicle is driven with high loads, the temperature of the sensing area of the oxygen sensor (rear) is sufficiently high. Thus, it is not necessary to apply the voltage to the heater.
8. If the voltage deviates from the standard value, replace the oxygen sensor (rear).
noteFor removal and installation of the oxygen sensor (rear), refer to GROUP 15 - Exhaust Pipe, Main Muffler And Catalytic Converter - Removal and Installation .