Air-Fuel Ratio (A/F) Sensor: Inspection
- INSPECT HEATER RESISTANCE OF A/F SENSOR (Bank 1 Sensor 1)
- Disconnect the sensor connector.
- Using an ohmmeter, measure the resistance between terminals +B and HT.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Resistance:
RESISTANCE CHART20°C (68°F) 0.8 - 1.4 Ω 800°C (1,472°F) 1.8 - 3.2 Ω If the resistance is not as specified, replace the sensor.
Torque: 20 N.m (200 kgf.cm, 14 ft.lbf)
- Reconnect the sensor connector.
- INSPECT OPERATION OF A/F SENSOR (See DTC P2195: OXYGEN (A/F) SENSOR SIGNAL STUCK LEAN and DTC P2238: OXYGEN SENSOR PUMPING CURRENT CIRCUIT LOW/HIGH )