Air Fuel Ratio Sensor: Inspection

WARNING: This page is about a different variant/trim than selected.

INSPECT AIR FUEL RATIO SENSOR

Check the resistance.
1. Using an ohmmeter, measure the resistance between the terminals.
Fig 1: Inspecting Air Fuel Ratio Sensor
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard Resistance

RESISTANCE REFERENCE

Tester Connection	Condition	Specified Condition
+B - HT	20°C (68°F)	1.8 to 3.4 Ω
HT-AF-	-	10 kΩ or higher

If the resistance is not as specified, replace the air fuel ratio sensor.