Toyota Tundra (2015 year). Manual — part 1310
OK
OK
TESTER CONNECTION
SWITCH
CONDITION
SPECIFIED
CONDITION
R11-6 (+B) - Body
Ground
Ignition switch ON
11 to 14 V
NG
GO TO STEP 9
3.
CHECK HARNESS AND CONNECTOR (FUEL PUMP ECU - BODY GROUND)
(a) Disconnect the fuel pump ECU connector.
(b) Measure the resistance according to the value(s) in the table
below.
Standard Resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
R11-3 (E) - Body ground
Always
Below 1 Ω
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
4.
CHECK HARNESS AND CONNECTOR (FUEL PUMP - FUEL PUMP ECU)
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: Fuel Pump Co...
OK
OK
(a) Disconnect the fuel pump connector.
(b) Disconnect the fuel pump ECU connector.
(c) Measure the resistance according to the value(s) in the table
below.
Standard Resistance:
TESTER CONNECTION
CONDITION
SPECIFIED
CONDITION
R6-4 (B) - R11-1 (FP)
Always
Below 1 Ω
R6-5 (E) - R11-2 (FP-)
Always
Below 1 Ω
R6-4 (B) or R11-1 (FP) - Body
ground
Always
10 kΩ or higher
R6-5 (E) or R11-2 (FP-) - Body
ground
Always
10 kΩ or higher
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
5.
INSPECT FUEL PUMP
(a) Inspect the fuel pump
.
HINT:
Perform "Inspection After Repair" after replacing the fuel pump
.
NG
REPLACE FUEL PUMP
6.
CHECK HARNESS AND CONNECTOR (FUEL PUMP ECU - ECM)
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: Fuel Pump Co...
OK
NEXT
(a) Disconnect the fuel pump ECU connector.
(b) Disconnect the ECM connector.
(c) Measure the resistance according to the value(s) in the table
below.
Standard Resistance:
TESTER CONNECTION
CONDITION
SPECIFIED
CONDITION
R11-5 (FPC) - A24-52 (FPC)
Always
Below 1 Ω
R11-5 (FPC) or A24-52 (FPC) -
Body ground
Always
10 kΩ or higher
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
7.
REPLACE FUEL PUMP ECU
(a) Replace the fuel pump ECU
.
8.
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED
(a) Check the fuel pump operation.
OK:
Malfunction has been repaired successfully.
NG
REPLACE ECM
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: Fuel Pump Co...
OK
OK
OK
END
9.
INSPECT FUEL PUMP RELAY (F/PMP)
(a) Inspect the fuel pump relay (F/PMP)
.
NG
REPLACE FUEL PUMP RELAY (F/PMP)
10.
CHECK FUEL PUMP RELAY (F/PMP) (POWER SOURCE VOLTAGE)
(a) Remove the fuel pump relay (F/PMP) from the engine room
relay block.
(b) Turn the ignition switch to ON.
(c) Measure the voltage according to the value(s) in the table
below.
Standard Voltage:
TESTER CONNECTION
CONDITION
SPECIFIED
CONDITION
F/PMP relay (1) - Body
ground
Ignition switch
ON
11 to 14 V
F/PMP relay (5) - Body
ground
Always
11 to 14 V
NG
GO TO STEP 12
11.
CHECK HARNESS AND CONNECTOR (FUEL PUMP RELAY - FUEL PUMP ECU)
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: Fuel Pump Co...
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