Heated Oxygen Sensor: Inspection

INSPECT HEATER RESISTANCE OF HEATED OXYGEN SENSOR (BANK 1 SENSOR 1)
1. Disconnect the oxygen sensor connector.
2. Using an ohmmeter, measure the resistance between the terminals +B and HT.
  
  Fig 1: Measuring Resistance Between Terminals +B & HT Using An Ohmmeter
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Resistance:
  - 1ZZ-FE: 5-10 Ω at 20°C (68°F)
  - 2ZZ-GE: 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, 31 ft.lbf)
3. Reconnect the oxygen sensor connector.
INSPECT HEATER RESISTANCE OF HEATED OXYGEN SENSOR (BANK 1, SENSOR 2)
1. Remove the passenger's seat.
2. Take out the floor carpet.
3. Disconnect the oxygen sensor connector.
4. Using an ohmmeter, measure the resistance between the terminals +B and HT.
  
  Fig 2: Measuring Resistance Between Terminals +B & HT Using An Ohmmeter
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  - 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, 31 ft.lbf)
5. Reconnect the oxygen sensor connector.
6. Resistance the floor carpet.
7. Reinstall the passenger's seat.