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.
2000 Lexus ES 300FACTORY OEM SERVICE PROCEDURE
Fuel EVAP System Test
- Fuel EVAP system is also referred to as On-Board Refilling Vapor Recovery (ORVR) system. Inspect all EVAP system lines and connections for sharp bends or damage. See Figure or Figure . Fuel inlet pipe may also be referred to as fuel filler pipe. Inspect fuel inlet pipe for cracks, damage or fuel leakage. Inspect fuel tank cap for cracks or deformed gasket. Replace components if defective or damaged.
- Start engine and warm engine to normal operating temperature. Shut engine off. Connect vacuum gauge from EVAP system test kit to EVAP service port. EVAP service port is located in engine compartment (under air filter housing), in the purge vacuum hose for EVAP system. See Figure or Figure .
- EVAP Vacuum Switching Valve (VSV) must be operated. If scan tool is available, go to next step. If scan tool is not available, go to step 5.
- Connect scan tool to Data Link Connector (DLC) No. 3. See Figure or Figure . Start engine. Turn scan tool on. Select ACTIVE TEST MODE on scan tool. Using scan tool manufacturer's instructions, activate EVAP VSV. Go to step 6.
- Disconnect EVAP VSV connector. EVAP VSV is mounted on air intake chamber and contains a Blue 2-pin electrical connector. See Figure. Using jumper wires, connect battery voltage and ground to EVAP VSV terminals. Start engine. Go to next step.
- Check vacuum reading on vacuum gauge with engine idling. Vacuum should be .368-19.713 in. Hg for more than 5 seconds. If vacuum is within specification, go to next step. If vacuum reading is not within specification, check for loose or restricted vacuum hose to EVAP service port, or for malfunctioning EVAP VSV. To check EVAP VSV operation, see EVAP VACUUM SWITCHING VALVE .
- Shut engine off. If using scan tool to operate EVAP VSV, stop operation of EVAP VSV. Remove scan tool. Go to next step. If connecting battery voltage to EVAP VSV to operate EVAP VSV, disconnect jumper wires and reconnect electrical connector on EVAP VSV. Go to next step.
- Disconnect vacuum gauge from EVAP service port. Connect pressure gauge to EVAP service port. Locate charcoal canister under rear of vehicle near fuel tank. See Fig 1 or Fig 2 . Install hose crimper on charcoal canister air drain hose. Air hose may be marked with a Yellow line indicating area to be crimped at.
Factory Service Tools
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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.