Toyota Avalon (XX50): Air Fuel Ratio Sensor(for Sensor 2)
Components
COMPONENTS
ILLUSTRATION
|
*1 | AIR FUEL RATIO SENSOR |
- | - |
 |
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 (HA1B) - 2 (+B) |
20°C (68°F) | 2 to 6 Ω | |
1 (HA1B) - 4 (A1B-) |
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.
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| (a) Using SST, install the air fuel ratio sensor to the front exhaust pipe assembly (TWC: Rear 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.
(c) Engage the wire harness clamp.
2. INSPECT FOR EXHAUST GAS LEAK
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3. PERFORM INITIALIZATION
(a) Perform "Inspection After Repair" after replacing the air fuel ratio sensor.
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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 2)
- Gas leak from exhaust system is repaired
| Inspection after repair |
- Poor idle, etc.
- Engine start function, etc.
|
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PROCEDURE
1. REMOVE AIR FUEL RATIO SENSOR
CAUTION:
To prevent burns, do not touch the engine, exhaust pipe or other high temperature components while the engine is hot.
| (a) Disengage the wire harness clamp. | |
(b) Disconnect the air fuel ratio sensor connector.
| (c) Using SST, remove the air fuel ratio sensor from the front exhaust pipe assembly (TWC: Rear Catalyst).
SST: 09224-00012 NOTICE: If the air fuel ratio sensor has been struck or dropped, replace it. |
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