Air Fuel Ratio Sensor: Inspection

INSPECT AIR FUEL RATIO SENSOR (for Bank 1 Sensor 1)

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

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

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

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

Fig 1: Identifying Air Fuel Ratio Sensor Connector Terminals

Text in Illustration

ILLUSTRATION LEGEND

*1	Component without harness connected (Air Fuel Ratio Sensor)