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Where is the fuel pump control module located?

Discussion in 'Toyota Hybrids and EVs' started by Dxta, Jan 30, 2021.

  1. Dxta

    Dxta Senior Member

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    Hi guys. I have got a none starting RAV4 hybrid 2019, that has not been starting.
    It's an accidental vehicle, imported from the USA into my country, Nigeria.

    Some of the EFI fuses were all blown, and I have to replace them.

    I scanned the vehicle, and got a P0628, which means, FUEL PUMP "A" CONTROL CIRCUIT LOW.

    I have checked and replaced the fuel pump with a known good one, replaced all EFI fuses. I tried looking for where the fuel pump control module is located, and can't seems to find it.

    Please is there anyone that knows where the location of the sensor is, so that I can check if the sensor is bad, or not.

    I'm of the opinion, that there is some sort of short circuiting on the fuel pump circuit. Maybe a wiring harness short-circuit.


    Dxta
     
    #1 Dxta, Jan 30, 2021
  2. ChapmanF

    ChapmanF Senior Member

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    What does the repair manual say to do for working up a P0628 ?
     
    #2 ChapmanF, Jan 30, 2021
  3. Elektroingenieur

    Elektroingenieur Senior Member

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    The Fuel Pump Control ECU is on the left rear side of the vehicle, concealed behind the Deck Trim Side Panel Assembly LH, just to the rear of the Rear Seat Back Lock Striker Sub-Assembly LH, the metal loop to which the left rear seat back is normally latched. This ECU is also shown in parts catalog Figure 84-04, Electronic Fuel Injection System, detail ①, part name code 89571. (Note that there are several versions of the RAV4, and that catalog may not be the correct one.)
    P0628 is the SAE DTC; the six-digit Toyota equivalent is P062714, Fuel Pump “A” Control Circuit Short to Ground or Open. The Repair Manual (more info) procedure says to check first at connector N15, the three-position connector at the Fuel Pump Control ECU, with ignition on, for 11 to 14 volts between +B (terminal 1) and ground (terminal 3). If that’s OK, the next step is to use a Toyota Techstream diagnostic system to do the Fuel Pump Single Phase Energization active test while monitoring the resistance between terminal 2 and body ground; the resistance is supposed to fluctuate during the test, in which case the trouble is assumed to be in the Fuel Pump Control ECU. Otherwise, there are further checks of the ECM, wire harness, and EFI-MAIN No. 2 Relay.
     
    #3 Elektroingenieur, Jan 30, 2021
  4. Dxta

    Dxta Senior Member

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    Thanks for the diagram. I now understand where exactly the module is now.
     
    #4 Dxta, Jan 30, 2021
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  5. Dxta

    Dxta Senior Member

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    One quick one pls. Is there a way to be ch test the fuel pump of this vehicle? I discovered it has three pinouts on the fuel pump.

    When I tried applying battery voltage to either of the pinouts in the pump, the pump works or vibrates for split seconds, and afterwards wouldn't turn again no matter how you test it. I thought it was a bad pump, got another brand new one, and did same test. It was the same thing.

    So my question is, does it means the third pinout on the pump, is like a fuel pressure signal wire or something?

    Any circuits on that fuel pump control circuit you can refer me to?

    Thanks
     
    #5 Dxta, Jan 31, 2021
  6. Elektroingenieur

    Elektroingenieur Senior Member

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    The low-pressure fuel pump uses a three-phase motor; that’s why there’s a Fuel Pump Control ECU to drive it. Toyota doesn’t specify the voltage or frequency required to operate the motor without its ECU.

    In the Repair Manual (more info), the inspection procedure for the pump says to measure the resistances among the three terminals (U to V, V to W, and U to W), which should all be in the range 0.05 to 3.0 Ω.
    I wonder if that might have burned out the pump.
     
    #6 Elektroingenieur, Jan 31, 2021
    Dxta likes this.
  7. Dxta

    Dxta Senior Member

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    Thanks for the reply. I never knew that fuel pump has three phase operations. This could be y testing it with 12V, wasn't working.
     
    #7 Dxta, Feb 1, 2021
    Elektroingenieur likes this.
  8. Michael Kent Handy

    Michael Kent Handy Junior Member

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    Is there a fuel pump control relay in a 2011 prius? I'm looking at my fuse box diagram, diagrams from another thread for gen 3, and guess it's possibly an EFI or IGCT relay. Can you let me know if it's somewhere else in the car like for that RAV4? I will look at the fuseable link in the rear if I can find it, and check the inside fuse box for any other inconsistencies with those diagrams(the engine bay fuse box diagram was slightly different).
     
    #8 Michael Kent Handy, May 19, 2024
  9. Michael Kent Handy

    Michael Kent Handy Junior Member

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    I just reviewed a gen 2 video that shows how the relay for that model is part of the integrated cassette relay module. My gen 3 has the integrated cassette relay, so I can pull that and test it!
     
    #9 Michael Kent Handy, May 19, 2024
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