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 42 (ENGINE CONTROLS - SYSTEM & COMPONENT TESTING)EMISSION SYSTEMS & SUB-SYSTEMSFUEL EVAPORATION SYSTEMCHARCOAL CANISTER ASSEMBLY (ES300)
2004 Toyota Matrix XR, FWD, Standard
Charcoal Canister Assembly (ES300)
2004 Toyota Matrix XR, FWD, StandardSECTION Charcoal Canister Assembly (ES300)
WARNING: This page is about a different car, the 2002 Lexus RX 300 and 2002 Lexus ES 300. However, it is still accessible from the selected car via links, so may be relevant.
- Visually check charcoal canister for cracks or damage. See Fig 1. Check charcoal canister operation by plugging vent port with cap. See Fig 2. While holding purge port closed, blow .26 psi (1.76 kPa) air into EVAP port ensure air flows from air drain port. While holding purge port and air drain port closed, blow .26 psi (1.76 kPa) air into EVAP port and ensure air does not flow from air inlet port. See Fig 3. Apply 1.01 in. Hg (3.43 kPa) vacuum to purge port. See Fig 4. Ensure vacuum does not decrease when air inlet port is closed, and check that vacuum decreases when air inlet port is released.
- While holding air inlet port closed, apply 1.01 in. Hg (3.43 kPa) to EVAP port and ensure vacuum air flows into purge port. See Fig 5. If vacuum air does not flow into purge port, replace charcoal canister. If air does flow, go to next step.
- Check VSV for pressure switching valve. Using ohmmeter, resistance between VSV pressure switching valve terminals should be 37-44 ohms at 68°F (20°C), or 51-62 ohms at 248°F (120°C). See Fig 6. If resistances are not to specification, replace VSV. If resistances are to specification, go to next step.
- Using ohmmeter, ensure there is no continuity between each terminal and VSV body. See Fig 7. If continuity is present, replace VSV. If continuity is not present, check that air does not flow between ports "E" to "F". See Fig 8. Apply battery voltage between VSV terminals. See Fig 9. Air should flow between terminals "E" to "F". If VSV does not operate as specified, replace VSV.
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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.