Heated Oxygen Sensor: Inspection

INSPECT HEATER RESISTANCE OF HEATED OXYGEN SENSORS
1. Disconnect the oxygen sensor connector.
2. Using an ohmmeter, measure the resistance between terminal +B and HT.
  Resistance: 11 - 16 Ω at 20°C (68°F)
  
  If the resistance is not as specified, replace the sensor.
  
  Torque:
  - 44 N.m (450 kgf.cm, 32 ft.lbf) for sensor 1
  - 20 N.m (200 kgf.cm, 14 ft.lbf) for sensor 2
3. Reconnect the oxygen sensor connector.
Fig 1: Inspecting Heater Resistance Of Heated Oxygen Sensors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT OPERATION OF HEATED OXYGEN SENSORS (See DTC P0130, P0150, P2195, P2196, P2197, P2198: OXYGEN SENSOR CIRCUIT (BANK 1 SENSOR 1), OXYGEN SENSOR SIGNAL STACK LEAN/RICH (BANK 1 & 2 SENSOR 1) and DTC P0136, P0156: OXYGEN SENSOR CIRCUIT MALFUNCTION (BANK 1 & 2 SENSOR 2) )