Tacoma PreRunner Reg Cab 2WD L4-2.7L (3RZ-FE) (1999)
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Oxygen Sensor: Testing and 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 ohm at 20 °C (68 °F)
Bank 1 Sensor 2: 11 - 16 ohm at 20 °C (68 °F)
If resistance is not as specified, replace the heated oxygen sensor.
c. Reconnect the heated oxygen sensor connector.
