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Fuel Pump Control Circuit [12/2015 - 08/2016]: Procedure

WARNING: This page is about a different car, the 2016 Toyota Sienna. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FUEL PUMP OPERATION 
    1. Check the fuel pump operation (Refer to ON-VEHICLE INSPECTION [12/2015 - 08/2016] ).

    Result: 

    NG 

    See step  5

    Result: 

    OK 

    See step  2

  2. INSPECT FUEL PMP RELAY 
    1. Inspect the FUEL PMP relay (Refer to PROCEDURE - Step 3 ).

    Result: 

    NG 

    REPLACE F/PMP RELAY 

    Result: 

    OK 

    See step  3

  3. INSPECT FUEL PUMP RESISTOR 
    1. Inspect the fuel pump resistor (Refer to INSPECTION [12/2015 - 08/2016] ).

    Result: 

    NG 

    REPLACE FUEL PUMP RESISTOR 

    (Refer to REMOVAL [12/2015 - 08/2016] )

    Result: 

    OK 

    See step  4

  4. CHECK HARNESS AND CONNECTOR (FUEL PMP RELAY - FUEL PUMP RESISTOR) 
    1. Remove the FUEL PMP relay from the engine room relay block.
    2. Disconnect the A29 fuel pump resistor connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      5 (F/PMP relay holder) - A29-1 (+B) Always Below 1 Ω
      4 (F/PMP relay holder) - A29-2 (FP) Always Below 1 Ω
      5 (F/PMP relay holder) or A29-1 (+B) - Body ground Always 10 kΩ or higher
      4 (F/PMP relay holder) or A29-2 (FP) - Body ground Always 10 kΩ or higher

    Result: 

    OK 

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

    (Refer to PROBLEM SYMPTOMS TABLE [12/2015 - 08/2016] )

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  5. PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE C/OPN RELAY) 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON and turn the Techstream on.
    3. Enter the following menus: Powertrain / Engine / Active Test / Activate the Fuel Pump Speed Control.
    4. Check the operation of the relay while operating it using the Techstream.

      OK

      Operating noise can be heard from the relay.

    Result: 

    NG 

    See step  11

    Result: 

    OK 

    See step  6

  6. INSPECT FUEL PUMP 
    1. Inspect the fuel pump (Refer to INSPECTION [12/2015 - 08/2016] ).

      HINT: 

      Perform "Inspection After Repair" after replacing the fuel pump (Refer to INITIALIZATION [12/2015 - 08/2016] ).

    Result: 

    NG 

    REPLACE FUEL PUMP 

    (Refer to REMOVAL [12/2015 - 08/2016] )

    Result: 

    OK 

    See step  7

  7. CHECK HARNESS AND CONNECTOR (FUEL PUMP - FUEL PMP RELAY) 
    1. Disconnect the g2 fuel pump connector.
    2. Remove the FUEL PMP relay from the engine room relay block.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      g2-4 (B) - 4 (FUEL PMP relay holder) Always Below 1 Ω
      g2-4 (B) or 4 (FUEL PMP relay holder) - Body ground Always 10 kΩ or higher

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  8

  8. INSPECT ENGINE ROOM RELAY BLOCK (C/OPN RELAY - FUEL PMP RELAY) 
    1. Remove the C/OPN relay from the engine room relay block.
      GTY303097Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the FUEL PMP relay from the engine room relay block.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      3 (C/OPN relay holder) - 2 (F/PMP relay holder) Always Below 1 Ω
      3 (C/OPN relay holder) - 3 (F/PMP relay holder) Always Below 1 Ω
      3 (C/OPN relay holder) or 2 (FUEL PMP relay holder) - Body ground Always 10 kΩ or higher
      3 (C/OPN relay holder) or 3 (FUEL PMP relay holder) - Body ground Always 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *a C/OPN relay holder
      *b F/PMP relay holder

    Result: 

    NG 

    REPLACE ENGINE ROOM RELAY BLOCK 

    Result: 

    OK 

    See step  9

  9. CHECK HARNESS AND CONNECTOR (FUEL PUMP - BODY GROUND) 
    1. Disconnect the g2 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
      g2-5 (E) - Body ground Always Below 1 Ω

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  10

  10. CHECK FUEL LINE 
    1. Check the fuel lines for leaks or blockage.

      OK

      No leaks or blockage

    Result: 

    OK 

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

    Result: 

    NG 

    REPAIR OR REPLACE FUEL LINE 

  11. INSPECT C/OPN RELAY 
    1. Inspect the C/OPN relay (Refer to PROCEDURE - Step 2 ).

    Result: 

    NG 

    REPLACE C/OPN RELAY 

    Result: 

    OK 

    See step  12

  12. CHECK HARNESS AND CONNECTOR (C/OPN RELAY VOLTAGE) 
    1. Remove the C/OPN relay from the engine room relay block.
      GTY304104Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Turn the ignition switch to ON.
    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 holder) - Body ground Ignition switch ON 11 to 14 V
      1 (C/OPN relay holder) - Body ground Ignition switch ON 11 to 14 V
      TEXT IN ILLUSTRATION

      *a C/OPN relay holder

    Result: 

    NG 

    REPLACE ENGINE ROOM RELAY BLOCK 

    Result: 

    OK 

    See step  13

  13. CHECK HARNESS AND CONNECTOR (C/OPN RELAY - ECM) 
    1. Remove the C/OPN relay from the engine room relay block.
    2. Disconnect the A39 ECM connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      2 (C/OPN relay holder) - A39-52 (FC) Always Below 1 Ω
      2 (C/OPN relay holder) or A39-52 (FC) - Body ground Always 10 kΩ or higher

    Result: 

    OK 

    REPLACE ECM 

    (Refer to REMOVAL [12/2015 - 08/2016] )

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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