2011 Infiniti EX35 Base, AWDFACTORY OEM SERVICE PROCEDURE

Component Function Check: Notes

  1. PERFORM COMPONENT FUNCTION CHECK

    Without CONSULT-III 

    1. Start engine and warm it up to the normal operating temperature.
    2. Turn ignition switch OFF and wait at least 10 seconds.
    3. Turn ignition switch ON.
    4. Turn ignition switch OFF and wait at least 10 seconds.
    5. Start engine and keep the engine speed between 3, 500 and 4, 000 RPM for at least 1 minute under no load.
    6. Let engine idle for 1 minute.
    7. Open engine hood.
    8. Check the voltage between ECM harness connector terminals under the following condition.
    VOLTAGE SPECIFICATION

    DTC ECM Condition Voltage
    Connector + -
    Terminal Terminal
    P0420 F102 76 [HO2S2 (bank 1)] 84 Keeping engine speed at 2, 500 RPM constant under no load The voltage fluctuation cycle takes more than 5 seconds.
    • 1 cycle: 0.6 - 1.0 → 0 - 0.3 → 0.6 - 1.0
    P0430 80 [HO2S2 (bank 2)]

    Is the inspection result normal? 

    YES: INSPECTION END

    NO: Go to "DIAGNOSIS PROCEDURE ".

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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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