Toyota Prius: Air Fuel Ratio Sensor

Inspection

INSPECTION

PROCEDURE

1. INSPECT AIR FUEL RATIO SENSOR

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

Standard Resistance:

Tester Connection	Condition	Specified Condition	Result
1 (HA1A) - 2 ( B)	20°C (68°F)	1.4 to 3.0 Ω	Ω
1 (HA1A) - 4 (A1A-)	Always	10 kΩ or higher	kΩ

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

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

Installation

INSTALLATION

CAUTION / NOTICE / HINT

COMPONENTS (INSTALLATION)

Procedure		Part Name Code
1	AIR FUEL RATIO SENSOR	89467B		-	-
2	WIRING HARNESS CLAMP BRACKET	82715	-	-	-

N*m (kgf*cm, ft.*lbf): Specified torque

For use with SST

Procedure		Part Name Code
3	OUTER COWL TOP PANEL SUB-ASSEMBLY	55701J	-	-	-
4	WATER GUARD PLATE	55734D	-	-	-
5	WINDSHIELD WIPER MOTOR AND LINK ASSEMBLY	-	-	-	-
6	INSPECT FOR EXHAUST GAS LEAK	-	-	-
7	PERFORM INITIALIZATION	-	-	-

Tightening torque for "Major areas involving basic Toyota Prius vehicle performance such as moving/turning/stopping": N*m (kgf*cm, ft.*lbf)

N*m (kgf*cm, ft.*lbf): Specified torque

PROCEDURE

1. INSTALL AIR FUEL RATIO SENSOR

Torque Wrench Fulcrum Length

(1) Using SST, install the air fuel ratio sensor to the exhaust manifold.

SST: 09224-00012

Torque:

Specified tightening torque :

44 N·m {449 kgf·cm, 32 ft·lbf}

NOTICE:

If the air fuel ratio sensor has been struck or dropped, replace it.

HINT:

Calculate the torque wrench reading when changing the fulcrum length of the torque wrench.
Click here
When using SST (fulcrum length of 30 mm (1.18 in.)) torque wrench (fulcrum length of 180 mm (7.09 in.)):
37.7 N*m (384 kgf*cm, 28 ft.*lbf)