2012 Infiniti EX35 Base, AWDFACTORY OEM SERVICE PROCEDURE

Operation When Intelligent Key Is Carried

  1. When the push-button ignition switch is pressed, the BCM activates the inside key antenna and transmits the request signal to the Intelligent Key.
  2. The Intelligent Key receives the request signal and transmits the Intelligent Key ID signal to the BCM.
  3. The BCM receives the Intelligent Key ID signal via the remote keyless entry receiver, and verifies it with the registered ID.
  4. BCM turns ACC relay ON and transmits the ignition power supply ON signal to IPDM E/R.
  5. IPDM E/R turns the ignition relay ON to start the ignition power supply.
  6. BCM confirms that the shift position is P or N.
  7. BCM transmits the starter request signal via CAN communication to IPDM E/R and turns the starter relay in IPDM E/R ON if BCM judges that the engine start condition is satisfied.
  8. IPDM E/R turns the starter control relay ON when receiving the starter request signal.
  9. Battery power is supplied through the starter relay and the starter control relay to operate the starter motor to start the cranking.
    CAUTION: If a malfunction is detected in the Intelligent Key system, the "KEY" warning lamp in the combination meter illuminates. At that time, the engine cannot be started.
  10. When BCM received feedback signal from ECM indicating that the engine is started, the BCM transmits a stop signal to IPDM E/R and stops the cranking by turning OFF the starter motor relay. (If the engine initiating has failed, the cranking will stop automatically within 5 seconds.)
    CAUTION: When the Intelligent Key is carried outside of the vehicle (inside key antenna detection area) with the power supply in ACC or ON position, even if the engine start condition* is satisfied, the engine cannot be started.

    *: For the engine start condition, refer to "POWER SUPPLY POSITION CHANGE TABLE BY PUSH-BUTTON IGNITION SWITCH OPERATION ".

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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.