Toyota Tundra (2015 year). Manual — part 2055

OK

OK

NEXT

(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)

(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

3UR-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)

3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: Fuel Pump Co...

(a) Remove the fuel pump relay (F/PMP) from the engine

room relay block.

(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

F/PMP relay (3) - R11-6 (+B)

Always

Below 1 Ω

F/PMP relay (3) or R11-6 (+B) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

REPAIR OR REPLACE HARNESS OR CONNECTOR

(FUEL PUMP RELAY - BODY GROUND)

12.

CHECK HARNESS AND CONNECTOR (FUEL PUMP RELAY - INTEGRATION RELAY,
BATTERY AND BODY GROUND)

3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: Fuel Pump Co...

(a) Disconnect the cable from the battery negative (-)

terminal.

(b) Disconnect the cable from the battery positive (+) terminal.

(c) Remove the fuel pump relay (F/PMP) from the engine room relay block.

(d) Remove the integration relay from the engine room relay block.

(e) 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) - Battery positive (+) terminal

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 Battery positive (+) terminal - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

GO TO ECM POWER SOURCE CIRCUIT

13.

PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE FUEL PUMP DUTY)

3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: Fuel Pump Co...