Heated Oxygen Sensor: Inspection

1. Disconnect the sensor connector.
2. Using an ohmmeter, measure the resistance between terminals +B and HT.
   Fig 1: Inspecting Heater Resistance Of Heated Oxygen Sensor

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Resistance: 

   HEATED OXYGEN SENSOR HEATER RESISTANCE SPECIFICATIONS
   
   

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

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

   Torque: 20 N.m (200 kgf.cm, 14 ft.lbf) 

3. Reconnect the oxygen sensor connector.

INSPECT OPERATION OF HEATED OXYGEN SENSOR (See  DTC P0136: OXYGEN SENSOR CIRCUIT MALFUNCTION (BANK 1 SENSOR 2)  )