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.
  
  Fig 1: Measuring Resistance Between Terminal +B & HT
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  1. Resistance: 11 - 16 Ω at 20°C (68°F)
  If the resistance is not as specified, replace the sensor.
  1. Torque:
  2. 44 N.m (450 kgf.cm, 32 ft.lbf) for sensor 1
  3. 20 N.m (200 kgf.cm, 14 ft.lbf) for sensor 2
3. Reconnect the oxygen sensor connector.
INSPECT OPERATION OF HEATED OXYGEN SENSORS (See DTC P0130, P0150, P2195, P2196, P2167, P2198: OXYGEN SENSOR CIRCUIT and DTC P0136: OXYGEN SENSOR CIRCUIT MALFUNCTION (BANK 1 SENSOR 2) DTC P0156: OXYGEN SENSOR CIRCUIT MALFUNCTION (BANK 2 SENSOR 2) )