Oxygen Sensor: Testing and Inspection
HEATED OXYGEN SENSORINSPECTION
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 Ohm at 20 °C (68 °F)
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 oxygen sensor connector.
2. INSPECT OPERATION OF HEATED OXYGEN SENSORS