[13C] MULTIPORT FUEL INJECTION (MPI) <4G69> - - ON-VEHICLE SERVICE - OXYGEN SENSOR CHECKPRINT PAGE / INDEX / PRIOR / NEXT
OXYGEN SENSOR CHECK
OXYGEN SENSOR (FRONT) <Vehicles except for Hong kong>
  1. Disconnect the oxygen sensor connector and connect the special tool Test harness (MB991658) to the connector on the oxygen sensor side.
           
    1. Make sure that there is continuity (11 - 18 Ω at 20°C: Vehicles except for Brazil, Chile and Hong kong), (4.5 - 8.0 Ω at 20°C: Vehicles for Brazil and Chile) between terminal No. 1 and No. 3 on the oxygen sensor connector.
    1. If there is no continuity, replace the oxygen sensor.
    1. Warm up the engine until engine coolant is 80°C or higher.
    1. Perform a tracing for 5 minutes or more with the engine speed of 4,500 r/min.
    1. Connect a digital voltage meter between terminal No. 2 and No. 4.
    1. While repeatedly racing the engine, measure the oxygen sensor output voltage.
    Standard value:
    Engine
    		 Oxygen sensor output voltage
    		 Remarks
    When racing the engine
    		 0.6 - 1.0 V
    		 If you make the air-fuel ratio rich by racing the engine repeatedly, a normal oxygen sensor will output a voltage of 0.6 - 1.0 V.
       CAUTION
      • Be very careful when connecting the jumper wire; incorrect connection can damage the oxygen sensor.
      • Be careful the heater is broken when voltage of beyond 8V is applied to the oxygen sensor heater.
      NOTE: If the sufficiently high temperature (of approximate 400°C or more) is not reached although the oxygen sensor is normal, the output voltage would be possibly low although the rich air-fuel ratio. Therefore, if the output voltage is low, use a jumper wire to connect the terminal No. 1 and the terminal No. 3 of the oxygen sensor with a (+) terminal and (-) terminal of 8 V power supply respectively, then check again.
    1. If the sensor is defective, replace the oxygen sensor.
      2. NOTE: For removal and installation of the oxygen sensor, refer to GROUP 15 - Exhaust Manifold. .
    OXYGEN SENSOR (REAR) <Vehicles for Brazil and Chile>
    1. Disconnect the oxygen sensor connector and connect the special tool Test harness (MD998464) to the connector on the oxygen sensor side.
         
      1. Make sure that there is continuity (11 - 18 Ω at 20°C) between terminal No.1 (red clip of special tool) and No. 3 (blue clip of special tool) on the oxygen sensor connector.
      1. If there is no continuity, replace the oxygen sensor.
      1. Warm up the engine until engine coolant is 80°C or higher.
      1. Perform a tracing for 5 minutes or more with the engine speed of 4,500 r/min.
           
        1. Connect a digital voltage meter between terminal No.2 (black clip of special tool) and No. 4 (white clip of special tool).
        1. While repeatedly racing the engine, measure the oxygen sensor output voltage.
        Standard value:
        Engine
        		 Oxygen sensor output voltage
        		 Remarks
        When racing the engine
        		 0.6 - 1.0 V
        		 If you make the air-fuel ratio rich by racing the engine repeatedly, a normal oxygen sensor will output a voltage of 0.6 - 1.0 V.
           CAUTION
          • Be very careful when connecting the jumper wire; incorrect connection can damage the oxygen sensor.
          • Be careful the heater is broken when voltage of beyond 12 V is applied to the oxygen sensor heater.
          NOTE: If the sufficiently high temperature (of approximate 400°C or more) is not reached although the oxygen sensor is normal, the output voltage would be possibly low although the rich air-fuel ratio. Therefore, if the output voltage is low, use a jumper wire to connect the terminal No.2 and the terminal No. 1 of the oxygen sensor with a (+) terminal and (-) terminal of 12 V power supply respectively, then check again.
        1. If the sensor is defective, replace the oxygen sensor.
          2. NOTE: For removal and installation of the oxygen sensor, refer to GROUP 15 - Exhaust Pipe and Main Muffler .
        OXYGEN SENSOR (FRONT) <Vehicles for Hong kong>
        1. Disconnect the oxygen sensor connector and connect the special tool Test harness (MB991316) to the connector on the oxygen sensor side.
                 
          1. Make sure that there is continuity (4.5 - 8.0 Ω at 20°C) between terminal No. 1 (red clip of special tool) and No. 3 (blue clip of special tool) on the oxygen sensor connector.
          1. If there is no continuity, replace the oxygen sensor.
          1. Warm up the engine until engine coolant is 80°C or higher.
          1. Perform a tracing for 5 minutes or more with the engine speed of 4,500 r/min.
               
            1. Connect a digital voltage meter between terminal No. 2 (black clip of special tool) and No. 4 (white clip of special tool).
            1. While repeatedly racing the engine, measure the oxygen sensor output voltage.
            Standard value:
            Engine
            		 Oxygen sensor output voltage
            		 Remarks
            When racing the engine
            		 0.6 - 1.0 V
            		 If you make the air-fuel ratio rich by racing the engine repeatedly, a normal oxygen sensor will output a voltage of 0.6 - 1.0 V.
               CAUTION
              • Be very careful when connecting the jumper wire; incorrect connection can damage the oxygen sensor.
              • Be careful the heater is broken when voltage of beyond 8V is applied to the oxygen sensor heater.
              NOTE: If the sufficiently high temperature (of approximate 400°C or more) is not reached although the oxygen sensor is normal, the output voltage would be possibly low although the rich air-fuel ratio. Therefore, if the output voltage is low, use a jumper wire to connect the terminal No. 1 (red clip of special tool) and the terminal No. 3 (blue clip of special tool) of the oxygen sensor with a (+) terminal and (-) terminal of 8 V power supply respectively, then check again.
            1. If the sensor is defective, replace the oxygen sensor.
              2. NOTE: For removal and installation of the oxygen sensor, refer to GROUP 15 - Exhaust Manifold. .
            OXYGEN SENSOR (REAR)
            1. Disconnect the oxygen sensor connector and connect the special tool Test harness (MD998464) to the connector on the oxygen sensor side.
                 
              1. Make sure that there is continuity (11 - 18 Ω at 20°C) between terminal No.1 (red clip of special tool) and No. 3 (blue clip of special tool) on the oxygen sensor connector.
              1. If there is no continuity, replace the oxygen sensor.
              1. Warm up the engine until engine coolant is 80°C or higher.
              1. Perform a tracing for 5 minutes or more with the engine speed of 4,500 r/min.
                   
                1. Connect a digital voltage meter between terminal No.2 (black clip of special tool) and No. 4 (white clip of special tool).
                1. While repeatedly racing the engine, measure the oxygen sensor output voltage.
                Standard value:
                Engine
                		 Oxygen sensor output voltage
                		 Remarks
                When racing the engine
                		 0.6 - 1.0 V
                		 If you make the air-fuel ratio rich by racing the engine repeatedly, a normal oxygen sensor will output a voltage of 0.6 - 1.0 V.
                   CAUTION
                  • Be very careful when connecting the jumper wire; incorrect connection can damage the oxygen sensor.
                  • Be careful the heater is broken when voltage of beyond 12 V is applied to the oxygen sensor heater.
                  NOTE: If the sufficiently high temperature (of approximate 400°C or more) is not reached although the oxygen sensor is normal, the output voltage would be possibly low although the rich air-fuel ratio. Therefore, if the output voltage is low, use a jumper wire to connect the terminal No.2 and the terminal No. 1 of the oxygen sensor with a (+) terminal and (-) terminal of 12 V power supply respectively, then check again.
                1. If the sensor is defective, replace the oxygen sensor.
                  2. NOTE: For removal and installation of the oxygen sensor, refer to GROUP 15 - Exhaust Pipe and Main Muffler .
                [13C] MULTIPORT FUEL INJECTION (MPI) <4G69> - - ON-VEHICLE SERVICE - OXYGEN SENSOR CHECKPRINT PAGE / INDEX / PRIOR / NEXT
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