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.

2004 Infiniti Q45FACTORY OEM SERVICE PROCEDURE

2. Check Purge Flow

With CONSULT-II

Disconnect vacuum hose connected to EVAP canister purge volume control solenoid valve at EVAP service port and install vacuum gauge.

Fig 1: Locating EVAP Service Port
Courtesy of NISSAN MOTOR CO., U.S.A.
Start engine and let it idle.
Select "PURG VOL CONT/V" in "ACTIVE TEST" mode with CONSULT-II.
Rev engine up to 2,000 RPM.
Touch "Qd" and "Qu" on CONSULT-II screen to adjust "PURG VOL CONT/V" opening and check vacuum existence.

Fig 2: Checking PURG VOL CONT/V (1 Of 2)

Courtesy of NISSAN MOTOR CO., U.S.A.

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.

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