Oxygen Sensor: Testing and Inspection

A/F Ratio Sensor:

INSPECT HEATER RESISTANCE OF A/F SENSORS
a. Disconnect the A/F sensor connector.
b. Using an ohmmeter measure the resistance between terminals +B and HT.
Resistance: 0.8 - 1.4 Ohm at 20°C (68°F)
If the resistance is not as specified, replace the sensor.
Torque: 44 Nm (440 kg.cm, 31 ft.lb)
c. Reconnect the A/F sensor connector.




Components




INSPECT HEATER RESISTANCE OF HEATED OXYGEN SENSOR (Bank 1 Sensor 2)
a. Remove the driver's seat.
b. Take out the floor carpet.
c. Disconnect the oxygen sensor connector.
d. Using an ohmmeter, measure the resistance between the terminals +B and HT.
Resistance: 11 - 16 Ohm at 20°C (68°F)
If the resistance is not as specified, replace the sensor.
Torque: 44 Nm (440 kg.cm, 31 ft.lb)
e. Reconnect the oxygen sensor connector.
f. Reinstall the floor carpet.
g. Reinstall the driver's seat.