toyota Workshop Repair Guides

Toyota Workshop Service and Repair Manuals

Air/Fuel Ratio Sensor|Page 1910 > < Heated Oxygen Sensor|Page 1907
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Oxygen Sensor: Testing and Inspection
Air/Fuel Ratio Sensor

INSPECT HEATER RESISTANCE OF A/F SENSORS (Bank 1 sensor 1, Bank 2 Sensor 1)

a. Disconnect the A/F sensor connector.

b. Using an ohmmeter measure the resistance between terminals +B and HT.

Resistance:
At 20 °C (68 °F)

0.8 - 1.4 Ohms

At 800 °C (1,472 °F)

1.8 - 3.2 Ohms

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.

Air/Fuel Ratio Sensor|Page 1910 > < Heated Oxygen Sensor|Page 1907