2013 Infiniti QX56 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.

With CONSULT

  1. Start engine.
  2. Check "FUEL PRES SEN V" in "DATA MONITOR" mode with CONSULT.
Monitor Item Condition Values/Status
FUEL PRES SEN V Idle 980 - 1, 200 mV
Revving engine from idle to 4, 000 rpm quickly 1, 100 - 2, 900 mV

WITHOUT CONSULT

  1. Start the engine.
  2. Check fuel rail pressure sensor signal voltage.
    + - Condition Value (Approx.)
    Fuel rail pressure sensor
    Connector Terminal
    F26 2 Ground Engine speed: idle 0.98 - 1.2 V
    Engine speed: Revving engine from idle to 4, 000 rpm quickly 1.1 - 2.9 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.