Using an ohmmeter, measure the resistance between terminals 1 (HT) and 2 (+B).
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Standard resistance
AIR FUEL RATIO SENSOR
| Condition |
Specified Condition |
| 20°C (68°F) |
1.8 to 3.4 Ω |
If the result is not as specified, replace the sensor.