Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 247 (ENGINE CONTROLS REMOVAL & INSTALLATION)FUEL SYSTEMFUEL SYSTEM PRESSURE RELEASE
2004 Toyota Matrix XR, FWD, Standard
Fuel System Pressure Release
2004 Toyota Matrix XR, FWD, StandardSECTION Fuel System Pressure Release
WARNING: This page is about a different car, the 2003 Lexus GX 470. However, it is still accessible from the selected car via links, so may be relevant.
- Remove circuit opening relay from engine room relay block. See Fig 1. Start engine. After engine has stopped on its own, turn ignition switch off. If DTC P0171 is output, check that engine does not start. Remove fuel tank cap and let air out of fuel tank.
- Connect battery terminal and install circuit opening relay.
- When disconnecting high fuel pressure line, a large amount of gasoline may spill out. Put a container under connection. Disconnect fuel pump tube. Drain fuel remaining in fuel pump tube. To prevent damage to disconnected fuel pump tube, cover ends with a vinyl bag.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.