Answer
Jun 04, 2025 - 06:26 AM
Ah yeah, it isn't a strange problem in on these third-gen RAV4s. On your 2007 model with the 2.2L 2AD-FTV D-4D diesel, the fuel pump relay isn’t located in the usual under-hood or dash fuse boxes like you'd expect on a gas model. That’s because D-4D systems often don’t use a traditional electric in-tank pump like petrol variants. Instead, the high-pressure pump on the engine does the work of drawing fuel from the tank via vacuum/suction.
That said, there is a fuel heater relay and circuit opening relay on some variants, depending on market. On Euro-spec D-4Ds, for instance, the relay setup is sometimes tucked under the driver’s side dash or near the ECU area, not labeled very clearly. Some versions even combine the fuel system relay into a multi-function integration relay, which complicates things.
But if you’re not seeing fuel reach the filter, here’s what I’d double-check:
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Make sure the fuel lines aren't clogged or leaking air (common after filter changes).
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Try using the primer bulb (if equipped) to manually draw fuel up.
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Check the filter assembly itself for a stuck one-way valve or improperly sealed gasket.
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Confirm the fuel cut solenoid on the injection pump is working, since it’s often fed through the ignition circuit.
Long story short: there might not be a traditional relay controlling an in-tank pump, because there may not be one. But when in doubt, the manual does cover this system layout, including diagrams and diagnostic flowcharts for fuel delivery issues on the D-4D engines.
Let me know if you're hearing any click from the tank when the key’s on, or if the primer has zero resistance. That can help narrow things down ✌🏻
