Toyota Tundra. Manual — part 1472



Following the Control the Injection Volume for A/F sensor procedure enables technicians to
check and graph the voltage outputs of both the A/F and HO2 sensors.



To display the graph, enter the following menus: Powertrain/Engine/Active Test/Control the
Injection Volume for A/F Sensor/A/F Control System/AFS B1 S1 and O2S B1 S2 or AFS B2
S1 and O2S B2 S2.

REMOVAL

1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

2. REMOVE PROPELLER SHAFT HEAT INSULATOR (for 4WD) . (SeeEXHAUST MANIFOLD ).

3. REMOVE FRONT PROPELLER SHAFT ASSEMBLY (for 4WD) . (See REMOVAL ).

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.

4



Gas leakage from
exhaust system
(Air-fuel ratio
extremely rich or
lean)

CAUTION:



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.

NOTE:



Some systems need to be initialized after the cable is reconnected.
(See INITIALIZATION ).



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.

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra

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

Fig. 380: Removing Air Fuel Ratio Sensor With SST (For Bank 1 Sensor 1)

8. REMOVE AIR FUEL RATIO SENSOR (for Bank 2 Sensor 1)

a. Using SST, remove the sensor.

SST 09224-00010

Fig. 381: Removing Air Fuel Ratio Sensor With SST (For Bank 2 Sensor 1)

INSTALLATION

1. INSTALL AIR FUEL RATIO SENSOR (for Bank 2 Sensor 1)

a. Using SST, install the sensor.

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra

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 (11.8 in.). If using a torque wrench with
a length that is not 30 cm (11.8 in.), calculate the torque specification for the torque wrench
and SST based on the "without SST" torque specification. (See REPAIR INSTRUCTION ).



Make sure SST and wrench are connected in a straight line.

Fig. 382: Identifying Torque Wrench With Fulcrum Length

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 (11.8 in.). If using a torque wrench with

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra

a length that is not 30 cm (11.8 in.), calculate the torque specification for the torque wrench
and SST based on the "without SST" torque specification. (See REPAIR INSTRUCTION ).



Make sure SST and wrench are connected in a straight line.

Fig. 383: Identifying Torque Wrench With Fulcrum Length

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.

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra