Air Fuel Ratio Sensor: Inspection

INSPECT AIR FUEL RATIO SENSOR

Measure the resistance according to the value(s) in the table below.

Standard resistance

RESISTANCE SPECIFICATION

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

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

Fig 1: Measuring Resistance Between Air Fuel Ratio Sensor Terminals