Toyota Tundra (2015 year). Manual — part 1690
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: Fuel Pressur...
WIRING DIAGRAM
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: Fuel Pressur...
OK
INSPECTION PROCEDURE
NOTICE:
Make sure that "Alcohol Density Learning" in the Data List has been completed before performing the
following troubleshooting procedures.
When "Alcohol Density Learning" has not been completed, start the engine and drive the vehicle at 32
km/h (20 mph) or more and maintain a constant speed for 2 minutes or more.
HINT:
PROCEDURE
1.
CHECK FUEL LEAK
(a) Visually check for fuel leaks.
OK:
No fuel leaks.
HINT:
The fuel pressure is normally 270 to 330 kPa when the fuel pressure switching valve is off, and 370 to
430 kPa when the valve is on.
If there is a fuel leak, the fuel pressure is below 270 kPa when the fuel pressure switching valve is off,
and below 370 kPa when the valve is on.
NG
REPAIR OR REPLACE FUEL LEAKAGE POINT
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: Fuel Pressur...
A
2.
INSPECT FUEL PRESSURE REGULATOR (for HIGH PRESSURE)
(a) Install the pressure gauge
.
(b) Start the engine.
(c) Check that the fuel pressure discharge when the ignition switch is turned off.
HINT:
If the fuel pressure in the high pressure side pressure regulator cannot remain stable, the fuel pressure
changes to below 270 kPa when the fuel pressure switching valve is off, and to below 370 kPa when the
fuel pressure switching valve is on.
Result
RESULT
PROCEED
TO
Fuel pressure remains almost constant or discharges gradually after a sudden drop
A
stops
B
B
REPLACE FUEL PRESSURE REGULATOR (for HIGH
PRESSURE)
3.
CHECK FUEL PUMP CONTROL SYSTEM
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: Fuel Pressur...
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