Operation CHARM: Car repair manuals for everyone.

Air-Fuel Ratio (A/F) Sensor

INSPECTION

1. INSPECT HEATER RESISTANCE OF A/F 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)

c. Reconnect the sensor connector.

2. INSPECT OPERATION OF A/F SENSOR