Oxygen Sensor: Testing and Inspection

HEATED OXYGEN SENSOR




COMPONENTS

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 Nm (450 kg.cm, 32 ft.lb) for sensor 1
20 Nm (200 kg.cm, 14 ft.lb) for sensor 2

c. Reconnect the oxygen sensor connector.

2. INSPECT OPERATION OF HEATED OXYGEN SENSORS