Tacoma PreRunner Extra Cab 2WD L4-2.7L (3RZ-FE) (1998)
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Oxygen Sensor: Testing and Inspection
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:
Bank 1 Sensor 1: 11 - 16 ohms at 20°C (68°F)
Bank 1 Sensor 2: 11 - 16 ohms at 20°C (68°F)
if resistance is not as specified, replace the heated oxygen sensor.
(c) Reconnect the heated oxygen sensor connector.