Toyota Tundra. Manual — part 1842

2

Using SST, connect terminals 13 (TC) and 4 (CG) of the DLC3

SST 09843-18040

Fig. 2: Identifying DLC3 Connector Terminal
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

3

Using the timing light, check the ignition timing

Ignition timing: 5 to 15° BTDC @ idling (transmission in neutral and A/C switch OFF)

4

Remove SST from the DLC3

5

Disconnect the timing light from the engine

2

INSPECT ENGINE IDLE SPEED

Fig. 3: Checking Ignition Timing
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

a

Warm up and stop the engine

1

Allow the engine to warm up to a normal operating temperature

b

When using the Techstream:

1

Connect the Techstream to the DLC3

NOTE:

Confirm the terminal numbers before connecting them.
Connecting the wrong terminals can damage the engine.

2009 Toyota Tundra

2009 ENGINE Engine Mechanical (2UZ-FE) - Tundra

2

Race the engine at 2500 rpm for approximately 90 seconds

3

Push the Techstream main switch ON

4

Enter the following menus: Powertrain/Engine and ECT/Data List/Primary/Engine Speed

Standard idle speed: 650 to 750 rpm (transmission in neutral and A/C switch OFF)

HINT:

Refer to the Techstream operator's manual for further details

If the idle speed is not as specified, check the air intake system

5

Disconnect the Techstream from the DLC3

c

When not using the Techstream:

1

Using SST, connect the tachometer probe to terminal 9 (TAC) of the DLC3

SST 09843-18030

Fig. 4: Identifying DLC3 Connector Terminal
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

2

Race the engine at 2500 rpm for approximately 90 seconds

3

Check the idle speed

Idle speed: 650 to 750 rpm (transmission in neutral and A/C switch OFF)

If the idle speed is not as specified, check the air intake system

4

Disconnect the tachometer from the DLC3

NOTE:

Switch off all accessories and the A/C before connecting the
Techstream.

NOTE:

Confirm the terminal numbers before connecting them.
Connecting the wrong terminals can damage the engine.

2009 Toyota Tundra

2009 ENGINE Engine Mechanical (2UZ-FE) - Tundra

3

INSPECT COMPRESSION

a

Warm up and stop the engine

1

Allow the engine to warm up to a normal operating temperature

b

Remove the 2 nuts and throttle body cover

c

Remove the air cleaner hose assembly

d

Remove the air cleaner cap

e

Disconnect the 8 injector connectors and 8 ignition coils

f

Remove the 8 bolts and 8 ignition coils

g

Remove the 8 spark plugs

h

Check the cylinder compression pressure

1

Insert a compression gauge into the spark plug hole

Fig. 5: Checking Cylinder Compression Pressure
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

2

Fully open the throttle

3

While cranking the engine, measure the compression pressure

Standard compression pressure: 1373 kPa (14.0 kgf/cm

2

, 199 psi) or more

Minimum pressure: 1030 kPa (10.5 kgf/cm

2

, 149 psi)

Difference between each cylinder: 98 kPa (1.0 kgf/cm

2

, 14.2 psi) or less

4

If the cylinder compression is low in one or more cylinders, pour a small amount of engine

NOTE:

Check each cylinder's compression pressure in the same way.

NOTE:



Always use a fully charged battery to obtain an engine
speed of 250 rpm or more.



This measurement must be done as quickly as possible.

2009 Toyota Tundra

2009 ENGINE Engine Mechanical (2UZ-FE) - Tundra

oil into the cylinder with low compression through its spark plug hole Then inspect the
cylinder compression pressure again

HINT:



If adding oil helps boost the compression, it is likely that the piston rings and/or
cylinder bore are worn or damaged



If pressure stays low, a valve may be stuck or seated improperly, or there may be
leakage in the gasket

i

Install the 8 spark plugs

j

Install the 8 ignition coils with the 8 bolts

k

Connect the 8 injector connectors and 8 ignition coils

l

Install the air cleaner cap

m

Install the air cleaner hose

n

Install the throttle body cover with the 2 nuts

4

INSPECT CO/HC

HINT:

This check is used only to determine whether or not the idle CO/HC complies with regulations

a

Start the engine

b

Keep the engine speed at 2500 rpm for approximately 180 seconds

c

Insert the CO/HC meter testing probe at least 40 cm (1 31 ft ) into the tailpipe during idling

d

Immediately check CO/HC concentration at idle and/or 2500 rpm

Fig. 6: Identifying CO/HC Meter
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

HINT:

When performing the 2 mode (2500 rpm and idle) test, follow the measurement order prescribed by
the applicable local regulations

e

If the CO/HC concentration does not comply with regulations, troubleshoot in the order given

2009 Toyota Tundra

2009 ENGINE Engine Mechanical (2UZ-FE) - Tundra