Toyota Tundra. Manual — part 1470

Fig. 373: Identifying Knock Sensor Replacement Components With Torque Specifications (2 Of 3)

2008 Toyota Tundra

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

Fig. 374: Identifying Knock Sensor Replacement Components With Torque Specifications (3 Of 3)

REMOVAL

1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

2008 Toyota Tundra

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

2. REMOVE INTAKE MANIFOLD ASSEMBLY

a. Remove the intake manifold. (See REMOVAL ).

3. REMOVE WATER BY-PASS PIPE SUB-ASSEMBLY . (See REMOVAL ).

4. REMOVE NO. 4 AIR INJECTION SYSTEM HOSE

5. REMOVE KNOCK SENSOR

a. Disconnect the 2 sensor connectors.

b. Remove the 2 nuts and 2 sensors.

Fig. 375: Locating Knock Sensor Connector & Nuts

INSPECTION

1. INSPECT KNOCK SENSOR

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

Standard resistance

STANDARD RESISTANCE SPECIFICATION

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

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.

Tester Connection Condition Specified Condition

1 - 2

20°C (68°F) 120 to 280 kohms

2008 Toyota Tundra

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

Fig. 376: Inspecting Knock Sensor

INSTALLATION

1. INSTALL KNOCK SENSOR

a. Install the 2 sensors with the 2 nuts as shown in the illustration.

Torque: 20 N*m (204 kgf*cm, 15 ft.*lbf)

b. Connect the 2 sensor connectors.

2. INSTALL NO. 4 AIR INJECTION SYSTEM HOSE

3. INSTALL WATER BY-PASS PIPE SUB-ASSEMBLY . (See INSTALLATION ).

4. INSTALL INTAKE MANIFOLD ASSEMBLY

a. Install the intake manifold. (See INSTALLATION ).

5. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL

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