Toyota Tundra. Manual — part 1657

Fig. 393: Inspecting Engine Coolant Temperature Sensor
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

a. Partially immerse the sensor in water and warm up the water.

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

Standard Resistance

RESISTANCE SPECIFIED CONDITIONS

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

HINT:

If the result is as specified, do not replace the engine coolant temperature sensor.

INSTALLATION

1. INSTALL ENGINE COOLANT TEMPERATURE SENSOR

a. Install a new gasket to the sensor.

Tester Connection

Condition

Specified Condition

1 - 2

Approx. 20°C (68°F)

2.32 k to 2.59 kohms

1 - 2

Approx. 80°C (176°F) 0.310 k to 0.326 kohms

NOTE:

When checking the sensor in water, keep the terminals dry. After the
check, wipe the sensor dry.

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

Saturday, June 19, 2010 7:34:51 PM

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© 2006 Mitchell Repair Information Company, LLC.

b. Using a 19 mm ball joint lock nut wrench, install the sensor.

Torque: without 19 mm ball joint lock nut wrench 20 N*m (200 kgf*cm, 14 ft.*lbf)

with 19 mm ball joint lock nut wrench 10 N*m (104 kgf*cm, 8 ft.*lbf)

Fig. 394: Locating Engine Coolant Temperature Sensor
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

c. Connect the sensor connector.

2. ADD ENGINE COOLANT (See COOLANT )

3. INSPECT FOR COOLANT LEAK (See COOLING SYSTEM )

4. INSTALL V-BANK COVER SUB-ASSEMBLY (See INSTALLATION )

5. INSTALL NO. 1 ENGINE UNDER COVER (See REPLACEMENT )

KNOCK SENSOR

COMPONENTS

Fig. 395: Identifying Knock Sensor And Related Components With Torque Specifications

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

Saturday, June 19, 2010 7:34:51 PM

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© 2006 Mitchell Repair Information Company, LLC.

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

REMOVAL

1. REMOVE INTAKE MANIFOLD

a. Remove the intake manifold (See REMOVAL ).

2. REMOVE NO. 2 CYLINDER HEAD COVER (See REMOVAL )

3. REMOVE NO. 1 ENGINE COVER (See REMOVAL )

4. REMOVE SEPARATOR CASE

a. Remove the 4 bolts and separator case.

Fig. 396: Locating Separator Case With Mounting Bolts
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

5. REMOVE KNOCK SENSOR

a. Disconnect the 4 knock sensor connectors.

b. Remove the 4 bolts and 4 knock sensors.

Fig. 397: Locating Knock Sensors Connectors With Mounting Bolts
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION

1. INSPECT KNOCK SENSOR

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

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

Saturday, June 19, 2010 7:34:51 PM

Page 723

© 2006 Mitchell Repair Information Company, LLC.

Standard Resistance

RESISTANCE SPECIFIED CONDITIONS

Fig. 398: Measuring Knock Sensor Resistance
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

INSTALLATION

1. INSTALL KNOCK SENSOR

a. Install the 4 sensors with the 4 bolts so that the sensors are angled as shown in the illustration.

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

Fig. 399: Identifying Knock Sensor Installation Angle
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

b. Connect the 4 sensor connectors.

2. INSTALL SEPARATOR CASE

Tester Connection Condition Specified Condition

1 - 2

20°C (68°F) 120 k to 280 kohms

NOTE:

The acceptable installation angle of the sensor is between 10°
upward and downward from the horizontal position.

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

Saturday, June 19, 2010 7:34:51 PM

Page 724

© 2006 Mitchell Repair Information Company, LLC.