Fuel Pump Control Circuit [09/2013 - ]: Procedure

1. Check the fuel pressure. Refer to ON-VEHICLE INSPECTION [09/2013 - ] - Step 2 .

   HINT: 

   If there is fuel pressure, you will hear the sound of fuel flowing.

OK → See step   10 

NG: Go to next step 

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 whether operating sounds can be heard while operating the relay using the Techstream.

   OK

   Operating sounds can be heard from relay.

OK → See step   5 

NG: Go to next step 

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Remove the C/OPN relay from the engine room No. 2 relay block.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   3 - 5	When no battery voltage applied to terminals 1 and 2	10 kΩ or higher
   3 - 5	When battery voltage applied to terminals 1 and 2	Below 1 Ω

NG → REPLACE CIRCUIT OPENING RELAY (C/OPN) 

OK: Go to next step 

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Turn the engine switch on (IG).
2. Measure the voltage according to the value(s) in the table below.

   Standard voltage

   Tester Connection	Switch Condition	Specified Condition
   A14-5 (FC) - E3-1 (E1)	Engine switch on (IG)	11 to 14 V

OK → See step   14 

NG → CHECK AND REPLACE HARNESS OR CONNECTOR (CIRCUIT OPENING RELAY (C/OPN) - ECM, EFI-B FUSE) 

1. Inspect the ECM power source circuit. Refer to ECM Power Source Circuit [09/2013 - ] .

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

NG → REPLACE FUEL PUMP RELAY (F/PMP) 

OK: Go to next step 

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

      Standard resistance

      Tester Connection	Condition	Specified Condition
      4 - 5	20°C (68°F)	0.2 to 3.0 Ω

2. Inspect the fuel pump operation.
   1. Apply battery voltage to both terminals. Check that the pump operates.
      NOTE:

      • These tests must be done quickly (within 10 seconds) to prevent the coil from burning out.
      • Keep the fuel pump as far away from the battery as possible.
      • Always turn the voltage on and off on the battery side, not the fuel pump side.

      HINT: 

      Perform "Inspection After Repair" after replacing the fuel pump. Refer to INITIALIZATION [09/2013 - ] .

NG → See step   15 

OK: Go to next step 

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Check the harness and connector between the fuel pump and F/PMP relay.
   1. Disconnect the S11 fuel pump connector.
   2. Remove the F/PMP relay from the engine room No. 2 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
      S11-4 - F/PMP relay (3)	Always	Below 1 Ω

      Standard resistance (Check for short)

      Tester Connection	Condition	Specified Condition
      S11-4 or F/PMP relay (3) - Body ground	Always	10 kΩ or higher

   4. Reconnect the fuel pump connector.
   5. Reinstall the F/PMP relay.
2. Check the harness and connector between the fuel pump and body ground.
   1. Disconnect the S11 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
      S11-5 - Body ground	Always	Below 1 Ω

   3. Reconnect the fuel pump connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Remove the C/OPN relay and F/PMP relay from the engine room No. 2 relay block.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance (Check for open)

   Tester Connection	Condition	Specified Condition
   C/OPN relay (3) - F/PMP relay (4)	Always	Below 1 Ω

   Standard resistance (Check for short)

   Tester Connection	Condition	Specified Condition
   C/OPN relay (3) or F/PMP relay (4) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE ENGINE ROOM NO. 2 RELAY BLOCK, JUNCTION BLOCK 

OK → CHECK AND REPAIR HARNESS OR CONNECTOR (EFI RELAY (EFI MAIN) - CIRCUIT OPENING RELAY (C/OPN)) 

NG → REPLACE FUEL PUMP RELAY (F/PMP) 

OK: Go to next step 

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard resistance

   Tester Connection	Condition	Specified Condition
   1 - 2	20°C (68°F)	0.941 to 0.999 Ω

NG → See step   16 

OK: Go to next step 

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Remove the F/PMP relay from the engine room No. 2 relay block.
2. Disconnect the A16 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
   F/PMP relay (4) - A16-1	Always	Below 1 Ω

   Standard resistance (Check for short)

   Tester Connection	Condition	Specified Condition
   F/PMP relay (4) or A16-1 - Body ground	Always	10 kΩ or higher

4. Reinstall the F/PMP relay.
5. Reconnect the fuel pump resistor connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the A16 fuel pump resistor connector.
2. Disconnect the S11 fuel pump connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance (Check for open)

   Tester Connection	Condition	Specified Condition
   A16-2 - S11-4	Always	Below 1 Ω

   Standard resistance (Check for short)

   Tester Connection	Condition	Specified Condition
   A16-2 or S11-4 - Body ground	Always	10 kΩ or higher

4. Reconnect the fuel pump resistor connector.
5. Reconnect the fuel pump connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   17