Oxygen Sensor: Testing and Inspection

INSPECTION

1. INSPECT HEATER RESISTANCE OF HEATED OXYGEN SENSORS
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 N.m (450 kg.cm, 32 ft.lb) for sensor 1
20 N.m (200 kg.cm, 14 ft.lb) for sensor 2

c. Reconnect the oxygen sensor connector.

2. INSPECT OPERATION OF HEATED OXYGEN SENSORS