Toyota Tundra. Manual — part 2121

1. Check that there are no fuel leaks after performing maintenance anywhere on the system.

If there are fuel leaks, repair or replace parts as necessary.

2. CHECK FUEL PRESSURE

a. Check that the battery voltage is 11 to 14 V.

b. Perform the "DISCHARGE FUEL SYSTEM PRESSURE" procedures (See PRECAUTION ).

c. Disconnect the cable from the negative (-) battery terminal.

d. Remove the fuel pipe clamp from the fuel tube connector.

Fig. 18: Identifying Fuel Pipe Clamp
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

e. Pinch and pull the fuel tube (fuel tube connector) to disconnect it.

NOTE:



When disconnecting the cable, 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.

CAUTION:



Always read the precautions (See PRECAUTION ) before
disconnecting the fuel tube connector (quick type).



The fuel tube may spray fuel as a result of the remaining
pressure. Do not allow fuel to be sprayed in the engine
compartment.

2009 Toyota Tundra

2009 ENGINE Fuel (3UR-FBE) - Tundra

f. Install SST (pressure gauge) as shown in the illustration.

SST 09268-45100 (09268-41260, 09268-41270, 09268-41250, 95336-08070, 96135-51300),
09268-31012 (09268-41500)

Fig. 20: Installing SST With Pressure Gauge
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

g. Wipe off any gasoline.

Fig. 19: Pulling Fuel Tube
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

2009 Toyota Tundra

2009 ENGINE Fuel (3UR-FBE) - Tundra

h. Reconnect the cable to the negative (-) battery terminal.

i. Operate the fuel pump.

1. Connect the Techstream to the DLC3.

2. Start the engine.

3. Turn the Techstream main switch on.

4. Enter the following menus: Powertrain/Engine and ECT/Active Test/Activate the Fuel

Pressure Switching Valve/High.

5. Measure the fuel pressure.

Standard fuel pressure:

370 to 430 kPa (3.77 to 4.38 kgf/cm

2

, 53.7 to 62.4 psi)

If the pressure is higher than the specification, replace the fuel pressure regulator (for high
pressure).

If the pressure is below the specification, check the fuel hoses and connections, fuel pump,
fuel filter and fuel pressure regulator (for high pressure), fuel pressure switching valve, and
fuel tubes for clogs.

6. Enter the following menus: Powertrain/Engine and ECT/Active Test/Activate the Fuel

Pressure Switching Valve/Low.

7. Measure the fuel pressure.

Standard fuel pressure:

270 to 330 kPa (2.75 to 3.37 kgf/cm

2

, 39.2 to 47.9 psi)

If the pressure is higher than the specification, check the fuel pressure regulator and fuel
pressure switching valve.

If the pressure is below the specification, check the fuel hoses and connections, fuel pump,
fuel filter and fuel pressure regulator, and fuel tubes for clogs.

j. Stop the engine.

k. Check that the fuel pressure remains as specified for 5 minutes after the engine has stopped.

Standard fuel pressure:

147 kPa (1.5 kgf/cm

2

, 21 psi) or more

If the pressure is not as specified, check the fuel pump, pressure regulator and/or injectors.

l. After checking the fuel pressure, disconnect the cable from the negative (-) battery terminal and

2009 Toyota Tundra

2009 ENGINE Fuel (3UR-FBE) - Tundra

carefully remove SST and the fuel tube connector to prevent gasoline from spraying.

m. Reconnect the fuel tube (fuel tube connector).

n. Check for fuel leaks.

1. Check that there are no fuel leaks after performing maintenance anywhere on the system.

If there are fuel leaks, repair or replace parts as necessary.

3. INSPECT FUEL PRESSURE SWITCHING VALVE OPERATION

a. Connect the Techstream to the DLC3.

b. Start the engine and warm it up.

c. Turn the Techstream main switch on.

d. Check the "Short FT" value in the Data List before and after activating the fuel pressure switching

valve by performing the Active Test.

HINT:



Enter the following menus: Powertrain/Engine and ECT/Active Test/Activate the Fuel
Pressure Switching Valve.



Enter the following menus: Powertrain/Engine and ECT/Data List/Short FT.

Standard value:

When comparing before and after activating the fuel pressure switching valve, the
"Short FT" value in the Data List changes by 10% or more.

If the value is outside the standard, perform a fuel pressure inspection. There may be an
operation malfunction or clog in the fuel pressure switching valve, fuel pressure regulator,
fuel pressure regulator (for high pressure) or fuel tubes.

FUEL INJECTOR

COMPONENTS

2009 Toyota Tundra

2009 ENGINE Fuel (3UR-FBE) - Tundra