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 / Active Test / Control the Fuel Pump / Speed.
5. Check whether fuel pump operating sounds can be heard while operating the fuel pump using the Techstream.

   OK

   Operating sounds can be heard from fuel pump.

   RESULT
   
   

   Result	Proceed to
   NG	A
   OK	B

B → See step   11 

A: Go to next step 

1. Disconnect the fuel pump control ECU assembly connector.
   Fig 1: Identifying Fuel Pump Control ECU Connector & Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Turn the engine switch on (IG).
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   P19-1 (+B) - Body ground	Engine switch on (IG)	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

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

NG → See step   9 

OK: Go to next step 

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   P19-4 (E) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   P19-6 (FP) - P7-4 (B)	Always	Below 1 Ω
   P19-5 (FP-) - P7-5 (E)	Always	Below 1 Ω
   P19-6 (FP) or P7-4 (B) - Body ground	Always	10 kΩ or higher
   P19-5 (FP-) or P7-5 (E) - 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 [06/2012 - ] .

   HINT: 

   Perform "Inspection After Repair" after replacing the fuel pump. Refer to INITIALIZATION [06/2012 - ] .

NG → See step   16 

OK: Go to next step 

1. Disconnect the fuel pump control ECU assembly 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
   P19-2 (FPC) - A22-18 (FPC)	Always	Below 1 Ω
   P19-2 (FPC) or A22-18 (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 control ECU assembly. Refer to REMOVAL [06/2012 - ] .

NEXT: Go to next step 

1. Check the fuel pump operation.

   OK

   Malfunction has been repaired successfully.

NG → See step   17 

OK → END 

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   P19-1 (+B) - 1C-6	Always	Below 1 Ω
   P19-1 (+B) or 1C-6 - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Inspect the No. 1 integration relay (EFI MAIN relay). Refer to INSPECTION [06/2012 - ] .

NG → See step   19 

OK → See step   18 

1. Remove the fuel pump. Refer to REMOVAL [06/2012 - ] .
2. Clean the fuel pump to completely remove any remaining fuel.
3. Connect the fuel pump connector.
   WARNING:

   Confirm that no fuel remains inside or on the outside of the fuel pump.

4. Connect the Techstream to the DLC3.
5. Turn the engine switch on (IG).
6. Turn the Techstream on.
7. Enter the following menus: Powertrain / Engine / Active Test / Control the Fuel Pump Duty.
8. 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
   4 (B) - 5 (E)	Fuel pump control duty: 25%	3.4 to 4.1 V
   	Fuel pump control duty: 80%	10.0 to 12.5 V

9. Enter the following menus: Powertrain / Engine / Active Test / Control the Fuel Pump / Speed.
10. 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
    4 (B) - 5 (E)	ON (Fuel pump control duty: 90%)	10.2 to 14.0 V

    HINT: 

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

NG → See step   14 

OK: Go to next step 

1. Disconnect the fuel pump control ECU assembly 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
   P19-2 (FPC) - A22-18 (FPC)	Always	Below 1 Ω
   P19-2 (FPC) or A22-18 (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 [06/2012 - ] .

NEXT → See step   15 

1. Replace the fuel pump control ECU assembly. Refer to REMOVAL [06/2012 - ] .

NEXT: Go to next step 

1. Check the fuel pump operation.

   OK

   Malfunction has been repaired successfully.

NG → See step   17 

OK → END