Toyota Tundra (2015 year). Manual — part 1238
(d) When performing the Active Test, check for fuel leakage from the fuel pipes.
Result
RESULT
PROCEED TO
HINT:
GO TO STEP 14
A
REPAIR OR REPLACE FUEL LINE
14.
CHECK FUEL SYSTEM
(a) Check for foreign matter such as iron particles around the fuel pump (fuel pump, fuel pump filter, and
inside the fuel tank), and for signs that the fuel pump was stuck.
Result
RESULT
PROCEED TO
There is foreign matter or signs that fuel pump was stuck
A
There is no foreign matter and no signs that fuel pump was stuck
B
B
GO TO STEP 24
A
REPAIR OR REPLACE FUEL SYSTEM
15.
CHECK FREEZE FRAME DATA
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present
when the DTC was stored
.
FREEZE FRAME DATA ITEM
SUSPECTED AREA
PROCEED
TO
COOLANT TEMP, AMBIENT
TEMPERATURE, INTAKE AIR
COOLANT TEMP, AMBIENT
TEMPERATURE
LONG FT
ENGINE
SPEED
Difference between Coolant
Temp, Ambient
Coolant Temp is 125°C or
more, or lower than
-
-
Engine coolant
temperature sensor
A
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1604; Startabi...
FREEZE FRAME DATA ITEM
SUSPECTED AREA
PROCEED
TO
COOLANT TEMP, AMBIENT
TEMPERATURE, INTAKE AIR
COOLANT TEMP, AMBIENT
TEMPERATURE
LONG FT
ENGINE
SPEED
Temperature and Intake Air
is 10°C or more
Ambient Temperature by
15°C or more
Other than above
-15% or
less, or
+15% or
more
-
Fuel pump
control
system
Fuel injector
assembly
B
-15 to
+15%
Minimum
speed is 300
rpm or
more*1
Engine assembly
C
Minimum
speed is
below 300
rpm
Fuel system
Intake air
system
D
Difference between Coolant
Temp, Ambient
Temperature and Intake Air
is less than 10°C
-
-15% or
less, or
+15% or
more
-
Fuel pump
control
system
Fuel injector
assembly
B
-15 to
+15%
Minimum
speed is 300
rpm or
more*1
Engine assembly
C
Minimum
speed is
below 300
rpm
Fuel system
Intake air
system
D
HINT:
*1: Compression loss may have occurred in the engine assembly.
Perform "Inspection After Repair" after replacing the engine assembly or engine coolant temperature sensor
.
B
GO TO STEP 16
C
CHECK AND REPAIR ENGINE
D
GO TO STEP 18
A
REPLACE ENGINE COOLANT TEMPERATURE SENSOR
16.
INSPECT FUEL INJECTOR ASSEMBLY
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1604; Startabi...
OK
(a) Check that no carbon is stuck to the fuel injector.
OK:
No carbon present.
HINT:
Perform "Inspection After Repair" after replacing the fuel injector assembly
.
NG
REPLACE FUEL INJECTOR ASSEMBLY
17.
CHECK FUEL SYSTEM
(a) Check for foreign matter such as iron particles around the fuel pump (fuel pump, fuel pump filter, and
inside the fuel tank), and for signs that the fuel pump was stuck.
Result
RESULT
PROCEED TO
There is foreign matter or signs that fuel pump was stuck
A
There is no foreign matter and no signs that fuel pump was stuck
B
B
GO TO STEP 24
A
REPAIR OR REPLACE FUEL SYSTEM
18.
CHECK FREEZE FRAME DATA
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present
when the DTC was stored
.
FREEZE FRAME DATA ITEM
RESULT
SUSPECTED AREA
PROCEED TO
Coolant Temp
Engine coolant temperature is 40°C or less*1
Pressure regulator
A
Engine coolant temperature is 40 to 90°C*2
Fuel injector assembly
B
Engine coolant temperature is 90°C or more*3
Pressure regulator
A
HINT:
*1: If the engine coolant temperature is 40°C or less (after stopping the engine and the vehicle is not driven for a
A
*2: If the engine coolant temperature is 40 to 90°C (15 to 120 minutes have passed after stopping the engine),
there may be fuel leaking from a fuel injector.
*3: If the engine coolant temperature is 90°C or more (2 to 5 minutes have passed after stopping the engine),
there may be a problem with the pressure regulator failing to maintain the fuel pressure. Attach a fuel pressure
gauge and check the ability to maintain fuel pressure after stopping the engine.
B
GO TO STEP 20
19.
CHECK FUEL PRESSURE
HINT:
For the fuel pressure inspection, refer to the following procedures
.
(a) Attach a fuel pressure gauge and check the fuel pressure after stopping the engine.
Standard:
147 kPa (1.5 kgf/cm
2
) or higher (5 minutes after stopping the engine)
HINT:
If the engine cannot be started, read the values after cranking the engine.
Result
RESULT
PROCEED TO
Normal
A
Abnormal
B
A
GO TO STEP 24
B
REPLACE FUEL PRESSURE REGULATOR ASSEMBLY
20.
CHECK FUEL INJECTOR ASSEMBLY
RESULT
PROCEED TO
4000 ppm or higher
A
Less than 4000 ppm
B
HINT:
If the concentration is 4000 ppm or higher, a fuel injector may have a sealing problem.
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1604; Startabi...
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