Tundra 4WD V8-4.7L (2UZ-FE) (2003)
Oxygen Sensor: Testing and Inspection
INSPECTION
1. INSPECT HEATER RESISTANCE OF HEATED OXYGEN SENSORS
a. Disconnect the sensor connector
b. Using an ohmmeter, measure the resistance between terminals +B and HT.
If the resistance is not as specified, replace the sensor.
Torque:
44 N.m (450 kgf.cm, 32 ft.lbf) for sensor 1
20 N.m (200 kgf.cm, 14 ft.lbf) for sensor 2
c. Reconnect the sensor connector.
2. INSPECT OPERATION OF HEATED OXYGEN SENSORS