Toyota Tundra (2015 year). Manual — part 1688
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13.
REPLACE FUEL PUMP ECU
(a) Replace the fuel pump ECU
.
14.
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED
(a) Check the fuel pump operation.
OK:
Malfunction has been repaired successfully.
NG
REPLACE ECM
OK
END
15.
CHECK HARNESS AND CONNECTOR (CIRCUIT OPENING RELAY - FUEL PUMP
RELAY AND IGN FUSE)
(a) Remove the circuit opening relay (C/OPN) from the
engine room relay block
.
(b) Remove the fuel pump relay (F/PMP) from the engine
room relay block
.
(c) Remove the IGN fuse from the engine room relay block.
(d) Measure the resistance according to the value(s) in the
table below.
Standard resistance:
TESTER CONNECTION
CONDITION
SPECIFIED
CONDITION
C/OPN relay (1) - IGN fuse (2)
Always
Below 1 Ω
C/OPN relay (3) - F/PMP relay (3)
Always
Below 1 Ω
C/OPN relay (1) or IGN fuse (2) -
Body ground
Always
10 kΩ or more
C/OPN relay (3) or F/PMP relay
(3) - Body ground
Always
10 kΩ or more
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: Fuel Pump C...
OK
OK
16.
INSPECT FUEL PUMP RELAY (F/PMP)
(a) Remove the fuel pump relay (F/PMP) from the engine
room relay block
.
(b) Measure the resistance according to the value(s) in the
table below.
Standard resistance:
TESTER
CONNECTION
CONDITION
SPECIFIED
CONDITION
3 - 5
When no battery voltage
applied to terminals 1 and 2
10 kΩ or higher
3 - 5
When battery voltage applied
to terminals 1 and 2
Below 1 Ω
NG
REPLACE FUEL PUMP RELAY (F/PMP)
17.
CHECK HARNESS AND CONNECTOR (FUEL PUMP RELAY - INTEGRATION RELAY,
BATTERY AND BODY GROUND)
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: Fuel Pump C...
(a) Remove the F/PMP fuse from the engine room relay
block.
(b) Measure the resistance according to the value(s) in the
table below.
Standard resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
F/PMP fuse
Always
Below 1 Ω
(c) Reinstall the F/PMP fuse.
(d) Remove the fuel pump relay (F/PMP) from the engine
room relay block
.
(e) Remove the integration relay from the engine room
relay block
.
(f) Disconnect the 1B integration relay connector.
(g) Disconnect the cable from the battery positive (+)
terminal.
(h) Measure the resistance according to the value(s) in the
table below.
Standard resistance:
TESTER CONNECTION
CONDITION
SPECIFIED
CONDITION
F/PMP relay (1) - 1B-4
Always
Below 1 Ω
F/PMP relay (5) - Positive (+)
battery cable
Always
Below 1 Ω
F/PMP relay (2) - Body ground
Always
Below 1 Ω
F/PMP relay (1) or 1B-4 - Body
ground
Always
10 kΩ or higher
F/PMP relay (5) or Positive (+)
battery cable - Body ground
Always
10 kΩ or higher
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
GO TO ECM POWER SOURCE CIRCUIT
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: Fuel Pump C...
Last Modified: 9-16-2014
6.6 J
Doc ID: RM000003302055X
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: 3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: Fuel Injector Circuit; 2015 MY Tundra [08/2014 -
]
Fuel Injector Circuit
DESCRIPTION
The fuel injectors are located on the intake manifold. They inject fuel into the cylinders based on the signals
from the ECM.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
1.
CHECK FUEL INJECTOR (POWER SOURCE)
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: Fuel Injector...
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