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...