Fuel Pump Control Circuit: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump/Speed.
5. Check whether operating sounds can be heard while operating the fuel pump using the Techstream.

   OK

   Operating sounds can be heard from fuel pump.

NG → See step   7 

OK: Go to next step 

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Remove the fuel tank assembly. Refer to REMOVAL [12/2011 - ] .
2. Remove the fuel pump from the fuel tank assembly.
3. Clean the fuel pump to completely remove any remaining fuel.
4. Connect the fuel pump connector.
   WARNING:

   Make sure that there is no fuel remaining inside or on the outside of the fuel pump.

5. Connect the Techstream to the DLC3.
6. Turn the engine switch on (IG).
7. Turn the Techstream on.
8. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump Duty.
9. Operate the fuel pump using the Active Test function and measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Techstream Operation	Specified Condition
   1 - 2	FPC Duty: 25%	3.2 to 4.05 V
   	FPC Duty: 80%	8.8 to 12.5 V

10. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump/Speed.
11. Operate the fuel pump using the Active Test function and measure the voltage according to the value(s) in the table below.

    Standard Voltage

    Tester Connection	Techstream Operation	Specified Condition
    1 - 2	ON (FPC Duty: 90%)	9.0 to 14.0 V

    HINT: 

    • Be sure to measure the voltage with all the connectors connected.
    • Before performing this inspection, check that the battery voltage is between 11 and 14 V (not depleted).
    TEXT IN ILLUSTRATION
    
    

    *a	Component with harness connected (Fuel Pump)

NG → See step   5 

OK: Go to next step 

1. Disconnect the fuel pump ECU connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   U38-5 (FPC) - A19-5 (FPC)	Always	Below 1 Ω
   U38-5 (FPC) or A19-5 (FPC) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Replace the fuel pump. Refer to REMOVAL [12/2011 - ] .

NEXT → See step   6 

1. Replace the fuel pump ECU. Refer to REMOVAL [12/2011 - ] .

NEXT: Go to next step 

1. Check the fuel pump operation.

   OK

   Malfunction has been repaired successfully.

NG → See step   17 

OK → END 

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the fuel pump ECU connector.
2. Turn the engine switch on (IG).
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   U38-6 (+B) - Body Ground	Engine switch on (IG)	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Fuel Pump ECU)

NG → See step   14 

OK: Go to next step 

1. Disconnect the fuel pump ECU connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   U38-3 (E) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the fuel pump connector.
2. Disconnect the fuel pump ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   U11-4 (B) - U38-1 (FP)	Always	Below 1 Ω
   U11-5 (E) - U38-2 (FP-)	Always	Below 1 Ω
   U11-4 (B) or U38-1 (FP) - Body ground	Always	10 kΩ or higher
   U11-5 (E) or U38-2 (FP-) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Inspect the fuel pump. Refer to INSPECTION [12/2011 - ] .

NG → See step   19 

OK: Go to next step 

1. Disconnect the fuel pump ECU connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   U38-5 (FPC) - A19-5 (FPC)	Always	Below 1 Ω
   U38-5 (FPC) or A19-5 (FPC) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Replace the fuel pump ECU. Refer to REMOVAL [12/2011 - ] .

NEXT: Go to next step 

1. Check the fuel pump operation.

   OK

   Malfunction has been repaired successfully.

NG → See step   16 

OK → END 

1. Inspect the No. 1 integration relay (EFI MAIN2). Refer to ON-VEHICLE INSPECTION [12/2011 - ] - Step 2 .

NG → REPLACE NO. 1 INTEGRATION RELAY 

OK: Go to next step 

1. Remove the No. 1 integration relay from the No. 2 engine room relay block.
2. Disconnect the fuel pump ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   2F-12 - U38-6 (+B)	Always	Below 1 Ω
   2F-12 or U38-6 (+B) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   18