Fuel Pump Control Circuit [03/2014 - ]: Procedure

1. Check the fuel pump operation. Refer to ON-VEHICLE INSPECTION [03/2014 - ] - Step 1 .

NG → See step   5 

OK: Go to next step 

1. Inspect the F/PMP relay. Refer to ON-VEHICLE INSPECTION [03/2014 - ] - Step 3 .

NG → REPLACE RELAY (F/PMP RELAY) 

OK: Go to next step 

1. Inspect the fuel pump resistor. Refer to INSPECTION [03/2014 - ] .

NG → See step   15 

OK: Go to next step 

1. Remove the F/PMP relay from the engine room relay block.
2. Disconnect the fuel pump resistor connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   5 (F/PMP relay) - A15-1	Always	Below 1 Ω
   4 (F/PMP relay) - A15-2	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   5 (F/PMP relay) or A15-1 - Body ground	Always	10 kΩ or higher
   4 (F/PMP relay) or A15-2 - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (F/PMP RELAY - FUEL PUMP RESISTOR) 

OK → See step   16 

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG) and turn the Techstream on.
3. Enter the following menus: Powertrain / Engine / Active Test / Control the Fuel Pump / Speed.
4. Check the operation of the relay while operating it using the Techstream.

   OK

   Operating noise can be heard from the relay.

NG → See step   11 

OK: Go to next step 

1. Inspect the fuel pump. Refer to INSPECTION [03/2014 - ] .

   HINT: 

   Perform "Inspection After Repair" after replacing the fuel pump. Refer to INITIALIZATION [03/2014 - ] .

NG → See step   17 

OK: Go to next step 

1. Disconnect the fuel pump connector.
2. Remove the F/PMP relay from the engine room relay block.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   P11-4 - 4 (F/PMP relay terminal)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   P11-4 or 4 (F/PMP relay terminal) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (FUEL PUMP - F/PMP RELAY) 

OK: Go to next step 

1. Remove the C/OPN relay from the engine room relay block.
2. Remove the F/PMP relay from the engine room relay block.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   3 (C/OPN relay) - 2 (F/PMP relay terminal)	Always	Below 1 Ω
   3 (C/OPN relay) - 3 (F/PMP relay terminal)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   3 (C/OPN relay) or 2 (F/PMP relay terminal) - Body ground	Always	10 kΩ or higher
   3 (C/OPN relay) or 3 (F/PMP relay terminal) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (C/OPN RELAY - F/PMP RELAY) 

OK: Go to next step 

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

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   P11-5 - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (FUEL PUMP - BODY GROUND) 

OK: Go to next step 

1. Check the fuel lines for leaks or blockage.

   OK

   No leaks or blockage

NG → REPAIR OR REPLACE FUEL LINE 

OK → REPAIR OR REPLACE FUEL SYSTEM (PRESSURE REGULATOR AND FUEL FILTER) 

1. Inspect the C/OPN relay. Refer to ON-VEHICLE INSPECTION [03/2014 - ] - Step 2 .

NG → REPLACE RELAY (C/OPN RELAY) 

OK: Go to next step 

1. Remove the C/OPN relay from the engine room relay block.

   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	Switch Condition	Specified Condition
   5 (C/OPN relay terminal) - Body ground	Engine switch on (IG)	11 to 14 V
   1 (C/OPN relay terminal) - Body ground	Engine switch on (IG)	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *1	Engine Room Relay Block

NG → REPLACE ENGINE ROOM RELAY BLOCK 

OK: Go to next step 

1. Remove the C/OPN relay from the engine room relay block.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   2 (C/OPN relay terminal) - A43-52 (FC)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   2 (C/OPN relay terminal) or A43-52 (FC) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (C/OPN RELAY - ECM) 

OK → See step   14