Air Fuel Ratio Sensor
REMOVALCAUTION:
- The procedures should be performed by at least 2 people.
- Wear protective gloves when removing the exhaust pipe.
- The exhaust pipe is extremely hot immediately after the engine has stopped.
- Confirm that the exhaust pipe has cooled down before removing it.
1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
NOTE:
- Some systems need to be initialized after the cable is reconnected.
- After the ignition switch is turned OFF, the navigation system requires approximately 90 seconds to record various types of memory and settings. As a result, after turning the ignition switch OFF, wait 90 seconds or more before disconnecting the cable from the negative (-) battery terminal.
2. REMOVE PROPELLER SHAFT HEAT INSULATOR (for 4WD)
3. REMOVE FRONT PROPELLER SHAFT ASSEMBLY (for 4WD)
4. REMOVE FRONT NO. 2 EXHAUST PIPE ASSEMBLY (for Regular Cab Standard Deck)
a. Disconnect the air fuel ratio sensor connector.
b. Disconnect the heated oxygen sensor connector.
c. Remove the 2 bolts from the front No. 3 exhaust manifold.
d. Remove the 3 nuts and exhaust pipe.
5. REMOVE FRONT NO. 2 EXHAUST PIPE ASSEMBLY
a. Disconnect the air fuel ratio sensor connector.
b. Disconnect the heated oxygen sensor connector.
c. Remove the 2 bolts and 2 nuts from the center exhaust pipe.
d. Remove the 3 nuts and exhaust pipe.
6. REMOVE FRONT EXHAUST PIPE ASSEMBLY
a. Disconnect the air fuel ratio sensor connector.
b. Disconnect the heated oxygen sensor connector and 2 clamps.
c. Remove the 2 bolts from the center exhaust pipe.
d. Remove the 3 nuts and exhaust pipe.
7. REMOVE AIR FUEL RATIO SENSOR (for Bank 1 Sensor 1)
a. Using SST, remove the sensor.
SST 09224-00010
8. REMOVE AIR FUEL RATIO SENSOR (for Bank 2 Sensor 1)
a. Using SST, remove the sensor.
SST 09224-00010
INSTALLATION
1. INSTALL AIR FUEL RATIO SENSOR (for Bank 2 Sensor 1)
a. Using SST, install the sensor.
SST 09224-00010
Torque: without SST 44 N.m (449 kgf.cm, 32 ft.lbf) with SST 40 N.m (408 kgf.cm, 30 ft.lbf)
HINT:
- Use a torque wrench with a fulcrum length of 30 cm (11.81 in.). If using a torque wrench with a length that is not 30 cm (11.81 in.), calculate the torque specification for the torque wrench and SST based on the "without SST" torque specification.
- Make sure SST and wrench are connected in a straight line.
2. INSTALL AIR FUEL RATIO SENSOR (for Bank 1 Sensor 1)
a. Using SST, install the sensor.
SST 09224-00010
Torque: without SST 44 N.m (449 kgf.cm, 32 ft.lbf) with SST 40 N.m (408 kgf.cm, 30 ft.lbf)
HINT:
- Use a torque wrench with a fulcrum length of 30 cm (11.81 in.). If using a torque wrench with a length that is not 30 cm (11.81 in.), calculate the torque specification for the torque wrench and SST based on the "without SST" torque specification.
- Make sure SST and wrench are connected in a straight line.
3. INSTALL FRONT EXHAUST PIPE ASSEMBLY
a. Install a new gasket and the exhaust pipe to the exhaust manifold RH with 3 new nuts.
Torque: 54 N.m (551 kgf.cm, 40 ft.lbf)
b. Install a new gasket and the exhaust pipe to the center exhaust pipe with the 2 bolts.
Torque: 48 N.m (489 kgf.cm, 35 ft.lbf)
c. Connect the air fuel ratio sensor connector.
d. Connect the heated oxygen sensor connector and 2 clamps.
4. INSTALL FRONT NO. 2 EXHAUST PIPE ASSEMBLY
a. Connect the front No. 2 exhaust pipe to the exhaust pipe support.
b. Install a new gasket and the front No. 2 exhaust pipe to the exhaust manifold LH with 3 new nuts.
Torque: 54 N.m (551 kgf.cm, 40 ft.lbf)
c. Install a new gasket and the front No. 2 exhaust pipe to the center exhaust pipe with the 2 bolts.
Torque: 48 N.m (489 kgf.cm, 35 ft.lbf)
d. Connect the air fuel ratio sensor connector.
e. Connect the heated oxygen sensor connector.
5. INSTALL FRONT NO. 2 EXHAUST PIPE ASSEMBLY (for Regular Cab Standard Deck)
a. Install a new gasket and the front No. 2 exhaust pipe to the exhaust manifold LH with 3 new nuts.
Torque: 54 N.m (551 kgf.cm, 40 ft.lbf)
b. Install a new gasket and front No. 2 exhaust pipe to the front No. 3 exhaust pipe with the 2 bolts and 2 nuts.
Torque: 48 N.m (489 kgf.cm, 35 ft.lbf)
c. Connect the air fuel ratio sensor connector.
d. Connect the heated oxygen sensor connector.
6. INSTALL FRONT PROPELLER SHAFT ASSEMBLY (for 4WD)
7. INSTALL PROPELLER SHAFT HEAT INSULATOR (for 4WD)
8. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL
NOTE: Some systems need to be initialized after the cable is reconnected.
9. INSPECT FOR EXHAUST GAS LEAK