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Home >> Toyota >> 2004 >> Echo L4-1.5L (1NZ-FE) >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Oxygen Sensor >> Testing and Inspection
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Oxygen Sensor: Testing and Inspection

INSPECTION




1. INSPECT HEATER RESISTANCE OF HEATED OXYGEN SENSOR (Bank1 Sensor1)
a. Disconnect the oxygen sensor connector.
b. Using an ohmmeter, measure the resistance between the terminals +B and HT.

Resistance: 11 - 16 Ohm @ 20 °C (68 °F)

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

Torque: 44 Nm (450 kgf.cm, 31 ft.lbf)

c. Reconnect the oxygen sensor connector.




2. INSPECT HEATER RESISTANCE OF HEATED OXYGEN SENSOR (Bank1, Sensor2)
a. Remove the passenger seat.
b. Fold back 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 @ 20 °C (68 °F)

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

Torque: 44 Nm (450 kgf.cm, 31 ft.lbf)

e. Reconnect the oxygen sensor connector.
f. Reinstall the floor carpet.
g. Reinstall the passenger's seat.
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