toyota Workshop Repair Guides

Toyota Workshop Service and Repair Manuals

Throttle Position Sensor > < Air/Fuel Ratio Sensor
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Oxygen Sensor: Testing and Inspection
Heated Oxygen Sensor

COMPONENTS

INSPECTION

1. INSPECT HEATER RESISTANCE OF HEATED OXYGEN SENSOR

a. Disconnect the oxygen sensor connector.

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

Resistance: 11 - 16 Ohms at 20° C (68° F)
-

If the resistance is not as specified, replace the sensor.

Torque: 44 Nm (450 kg.cm, 32 ft.lb)

c. Reconnect the oxygen sensor connector.

2. INSPECT OPERATION OF HEATED OXYGEN SENSOR

Throttle Position Sensor > < Air/Fuel Ratio Sensor