2018 Infiniti QX60 AWDFACTORY OEM SERVICE PROCEDURE

High Fuel Pressure Check

NOTE: Since the fuel pressure gauge kit cannot be connected, follow the method shown below to check high fuel pressure.

SYMBOL With CONSULT

  1. Start engine.
  2. Check "FUEL PRES SEN V" in "Data Monitor" mode of "ENGINE".

    Monitor Item

    Condition

    Values/Status

    FUEL PRES SEN V
    • Engine: After warming up
    • Selector lever: P or N
    • Air conditioner switch: OFF
    • No load

    Idle

    1.120 - 1.310 V

    2, 000 RPM

    1.215 - 1.425 V

SYMBOL Without CONSULT

  1. Start engine.
  2. Check fuel rail pressure Sensor voltage.

ECM

Condition

Voltage

Connector

+

-

Terminal

F78

53

83

[Engine is running]

  • Warm-up condition
  • Idle speed

1.12 - 1.31 V

[Engine is running]

  • Warm-up condition
  • Engine speed: 2, 000 RPM

1.22 - 1.42 V
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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