AIR FUEL RATIO SENSOR (for Sedan): Inspection: Inspection

INSPECT AIR FUEL RATIO SENSOR

Fig 1: Measuring Resistance Between Air Fuel Ratio Sensor Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Check the resistance.

Using an ohmmeter, measure the resistance between the terminals.

Standard resistance

Tester Connection	Specified Condition
1 (HA1A) - 2 (+B)	1.8 to 3.4 Ω at 20°C (68°F)
1 (HA1A) - 4 (A1A-)	10 kΩ or higher

If the resistance is not as specified, replace the sensor.