Toyota Tundra. Manual — part 1295

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. 376: Installing Heated Oxygen Sensor (Bank 1 Sensor 2)

2. INSTALL HEATED OXYGEN SENSOR (for Bank 2 Sensor 2)

a. Using SST, install the sensor.

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.

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra

Fig. 377: Installing Heated Oxygen Sensor (Bank 2 Sensor 2)

3. INSTALL FRONT EXHAUST PIPE ASSEMBLY (See INSTALLATION )

4. INSTALL FRONT NO. 2 EXHAUST PIPE ASSEMBLY (except Regular Cab Standard Deck) (See

INSTALLATION )

5. INSTALL FRONT NO. 2 EXHAUST PIPE ASSEMBLY (for Regular Cab Standard Deck) (See

INSTALLATION )

6. INSTALL FRONT NO. 3 EXHAUST PIPE SUB-ASSEMBLY (for Regular Cab Standard Deck)

(See INSTALLATION )

7. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL

IGNITION RELAY NO. 2

ON-VEHICLE INSPECTION

1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

2. REMOVE INTEGRATION RELAY (UNIT E)

a. Remove the engine room relay block cover.

NOTE:

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

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 (1GR-FE) - Tundra

b. Using a screwdriver, detach the 2 claws and disconnect the integration relay from the engine room

relay block.

HINT:

Tape the screwdriver tip before use.

c. Disconnect the 3 connectors.

3. INSPECT INTEGRATION RELAY (IGNITION RELAY NO. 2)

Fig. 378: Locating Integration Relay Claws

NOTE:



Some relays are built into the integration relay (unit E). The integration
relay cannot be disassembled. If there is a malfunction in the circuit of the
integration relay, replace the integration relay.



The internal circuit of the integration relay is as shown in the illustration
below. Inspect the integration relay using the following procedures.

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra

a. Measure the resistance of the IG2 MAIN fuse.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

If the result is not as specified, replace the IG2 MAIN fuse.

b. Measure the resistance of the ignition relay No. 2 (IG2) circuit.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Fig. 379: Integration Relay (Unit E) Inner - Circuit Diagram

Tester Connection Condition Specified Condition

IG2 MAIN fuse

Always

Below 1 ohms

Tester

Connection

Condition

Specified

Condition

1C-1 - 1B-8

When battery voltage is not applied between 1B-6
and 1B-7

10 kohms or higher

When battery voltage is applied between 1B-6 and

Below 1 ohms

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra