Toyota Avalon (XX50): Air Fuel Ratio Sensor(for Sensor 1)
Components
COMPONENTS
ILLUSTRATION
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*1 | AIR FUEL RATIO SENSOR |
*2 | NO. 1 ENGINE COVER SUB-ASSEMBLY |
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N*m (kgf*cm, ft.*lbf): Specified torque |
* | For use with SST |
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 | |
1 (HA1A) - 2 (+B) |
20°C (68°F) | 1.6 to 3.2 Ω | |
1 (HA1A) - 4 (A1A-) |
Always | 10 kΩ or higher |
If the result is not as specified, replace the air fuel ratio sensor. |
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|
*a | Component without harness connected
(Air Fuel Ratio Sensor) | | |
Installation
INSTALLATION
PROCEDURE
1. INSTALL AIR FUEL RATIO SENSOR
HINT:
Perform "Inspection After Repair" after replacing the air fuel ratio sensor.
Click here 
| (a) Using SST, install the air fuel ratio sensor to the exhaust manifold (TWC: Front Catalyst).
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:
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*a | Torque Wrench Fulcrum Length | | |
| (b) Connect the air fuel ratio sensor connector. |
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*a | Tie Band | |
*b | Wire Harness Clamp | | |
(c) Engage the 3 wire harness clamps so that the tie band is positioned as shown in the illustration.
2. INSTALL NO. 1 ENGINE COVER SUB-ASSEMBLY
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3. INSPECT FOR EXHAUST GAS LEAK
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4. PERFORM INITIALIZATION
(a) Perform "Inspection After Repair" after replacing the air fuel ratio sensor.
Click here
Removal
REMOVAL
CAUTION / NOTICE / HINT
The
necessary procedures (adjustment, calibration, initialization, or
registration) that must be performed after parts are removed and
installed, or replaced during air fuel ratio sensor removal/installation
are shown below.
Necessary Procedures After Parts Removed/Installed/Replaced |
Replaced Part or Performed Procedure |
Necessary Procedure | Effect/Inoperative Function when Necessary Procedure not Performed |
Link |
- Replacement of air fuel ratio sensor (sensor 1)
- Gas leak from exhaust system is repaired
| Inspection after repair |
- Poor idle, etc.
- Engine start function, etc.
|
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PROCEDURE
1. REMOVE NO. 1 ENGINE COVER SUB-ASSEMBLY
Click here
2. REMOVE AIR FUEL RATIO SENSOR
CAUTION:
To prevent burns, do not touch the engine, exhaust manifold or other high temperature components while the engine is hot.
| (a) Disengage the 3 wire harness clamps. | |
(b) Disconnect the air fuel ratio sensor connector.
| (c) Using SST, remove the air fuel ratio sensor from the exhaust manifold (TWC: Front Catalyst).
SST: 09224-00012 NOTICE: If the air fuel ratio sensor has been struck or dropped, replace it. |
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