Heated Oxygen Sensor: Inspection

INSPECT HEATER RESISTANCE OF HEATED OXYGEN SENSORS 

1. Disconnect the oxygen sensor connectors.
2. Using an ohmmeter, measure the resistance between the terminals +B and HT.

   Resistance: 

   OXYGEN SENSOR RESISTANCE
   
   

   Temperature	Resistance
   20°C (68°F)	11-16 Ω
   800°C (1,472°F)	23-32 Ω

   If the resistance is not as specified, replace the sensor.

   1. Torque: 45 N.m (450 kgf.cm, 33 ft.lbf) 
   Fig 1: Measuring Resistance Between Oxygen Sensor Connectors Terminals +B And HT

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Reconnect the oxygen sensor connectors.

INSPECT HEATER RESISTANCE OF HEATED OXYGEN SENSOR 

1. Remove the front seat assembly RH.
2. Remove the air duct guide rear RH.
3. Disconnect the oxygen sensor connector.
4. Using an ohmmeter, measure the resistance between the terminals +B and HT.

   Resistance: 

   OXYGEN SENSOR RESISTANCE
   
   

   Temperature	Resistance
   20°C(68°F)	11-16Ω
   800°C (1,472°F)	23-32Ω

   If the resistance is not as specified, replace the sensor.

   1. Torque: 45 N.m (450 kgf.cm, 33 ft.lbf) 
   Fig 2: Measuring Resistance Between Oxygen Sensor Connectors Terminals +B And HT (Bank 2 Sensor 2)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Reconnect the oxygen sensor connector.
6. Install the air duct guide rear RH.
7. Install the front seat assembly RH.