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Home >> Nissan-Datsun >> 2012 >> Cube Base >> Repair and Diagnosis >> Accessories & Equipment >> Anti-Theft Systems >> Security Control System (With Intelligent Key System) >> System Description >> Intelligent Key System/Engine Start Function >> System Description >> Operation When Intelligent Key Is Carried
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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 via the remote keyless entry receiver.
  3. BCM receives the Intelligent Key ID signal via 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 and starts the ignition power supply.
  6. BCM detects that the selector lever position and brake pedal operating condition.
  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. Power supply is supplied through the starter relay and the starter control relay to operate the starter motor and start 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 receives feedback signal from ECM indicating that the engine is started, the BCM transmits a stop signal to IPDM E/R and stops cranking by turning OFF the starter relay. (If engine start is unsuccessful, cranking stops automatically within 5 seconds.)
    CAUTION: When the Intelligent Key is carried outside of the vehicle (inside key antenna detection area) while the power supply is in the 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 ".