4 Runner 2WD L4-2693cc 2.7L DOHC MFI (1997)
Oxygen Sensor: Component Tests and General Diagnostics
INSPECTION
(Bank 1 Sensor 1, Bank 1 Sensor 2)
INSPECT HEATER RESISTANCE OF HEATED OXYGEN SENSORS
1. DIsconnect the heated oxygen sensor connector.
Sensor No.1
Sensor No.2
2. Using an ohmmeter, measure the resistance between terminals +B and HT.
Resistance: At 20°C (68°F):
Bank 1 Sensor 1: 11 - 16 ohms
Bank 2 Sensor 2: 11 - 16 ohms
If resistance is not as specified, replace the heated oxygen sensor.
3. Reconnect the heated oxygen sensor connector.
