Tacoma Extra Cab 4WD L4-2693cc 2.7L DOHC MFI (1997)
Oxygen Sensor: Testing and Inspection
HEATED OXYGEN SENSORS INSPECTION
INSPECT HEATER RESISTANCE OF HEATED OXYGEN SENSORS
(a) Disconnect the heated oxygen sensor connector.
(b) Using an ohmmeter, measure the resistance between terminals +B and HT.
Resistance:
At 20°C (68°F):
Bank 1 Sensor 1:5 - 7 Ohms
Bank 1 Sensor 2:11 - 18 Ohms
If resistance is not as specified, replace the heated oxygen sensor.
(c) Reconnect the heated oxygen sensor connector.
