2023 Infiniti QX55 EssentialFACTORY OEM SERVICE PROCEDURE

Commercial Service Tools

Tool name

(TechMate No.)

Description

Fuel pressure gauge

(--)

GNSDB17997Courtesy of NISSAN NORTH AMERICA, INC.

Measuring fuel pressure

Leak detector

i.e.: (J-41416)

GNSDB13642Courtesy of NISSAN NORTH AMERICA, INC.

Locates the EVAP leak

EVAP service port adapter

i.e.: (J-41413-OBD)

GNSDB11686Courtesy of NISSAN NORTH AMERICA, INC.

Applies positive pressure through EVAP service port

Fuel filler cap adapter

i.e.: (J-42909)

GNSDB11788Courtesy of NISSAN NORTH AMERICA, INC.

Checks fuel tank vacuum relief valve opening pressure

EVAP service port

GNSDB39080Courtesy of NISSAN NORTH AMERICA, INC.

Connects pressure pump to EVAP line

(Par No. 149393S500)

NOTE: This tool is used if the vacuum delay valve does not have EVAP service port.
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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