Toyota Tundra. Manual — part 1473

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) (See INSTALLATION )

7. INSTALL PROPELLER SHAFT HEAT INSULATOR (for 4WD) . See INSTALLATION ).

8. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL

9. INSPECT FOR EXHAUST GAS LEAK . See EXHAUST MANIFOLD ).

HEATED OXYGEN SENSOR

COMPONENTS

NOTE:

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

2008 Toyota Tundra

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

Fig. 384: Identifying Heated Oxygen Sensor Replacement Components With Torque Specifications

ON-VEHICLE INSPECTION

1. CHECK HEATED OXYGEN SENSOR

a. Disconnect the 2 sensor connectors.

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

2008 Toyota Tundra

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

Standard resistance (for Bank 1 sensor 1)

STANDARD RESISTANCE SPECIFICATION - (FOR BANK 1 SENSOR 1)

Standard resistance (for Bank 2 sensor 2)

STANDARD RESISTANCE SPECIFICATION - (FOR BANK 2 SENSOR 2)

If the result is not as specified, replace the sensor.

c. Connect the 2 sensor connectors.

REMOVAL

1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

Tester Connection Condition Specified Condition

1 (HT1B) - 2 (+B) 20°C (68°F)

11 to 16 ohms

Tester Connection Condition Specified Condition

1 (HT2B) - 2 (+B) 20°C (68°F)

11 to 16 ohms

CAUTION:



The procedures should be performed by at least 2 people.

Fig. 385: Identifying Heated Oxygen Sensor Connector Terminal



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.

2008 Toyota Tundra

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

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

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

4. REMOVE FRONT NO. 2 EXHAUST PIPE ASSEMBLY (for Regular Cab Standard Deck) (See

REMOVAL ).

5. REMOVE FRONT NO. 2 EXHAUST PIPE ASSEMBLY (See REMOVAL )

6. REMOVE FRONT EXHAUST PIPE ASSEMBLY (See REMOVAL )

7. REMOVE HEATED OXYGEN SENSOR (for Bank 1 Sensor 2)

a. Using SST, remove the sensor.

SST 09224-00010

Fig. 386: Removing Heated Oxygen Sensor With SST (For Bank 1 Sensor 2)

8. REMOVE HEATED OXYGEN SENSOR (for Bank 2 Sensor 2)

a. Using SST, remove the sensor.

SST 09224-00010

(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