2008 Nissan-Datsun Sentra Base, Automatic CVTFACTORY OEM SERVICE PROCEDURE

Engine Start Function: Notes

When the registered Intelligent Key is carried, the engine can be started without inserting the key.

Fig 1: Engine Start Function - System Diagram
G04927620Courtesy of NISSAN MOTOR CO., U.S.A.

When ignition knob switch is ON (press ignition switch), Intelligent Key unit searches Intelligent Key in the vehicle using inside key antenna.

When Intelligent Key is inside the vehicle, it performs the following operation.

  • Illuminate green "KEY" warning lamp in combination meter.
  • Released steering lock and ignition switch can be turned from OFF to ACC, ON or START position.
    NOTE: If Intelligent Key is not registered, "KEY" warning lamp in combination meter illuminates red.
  • Intelligent Key sends engine start signal via CAN communication line.

When ignition switch turns to START position, BCM sends starter request signal to IPDM E/R. Then, engine starts.

Even if Intelligent Key battery runs down, Intelligent Key unit can start engine with mechanical key built into Intelligent Key. For details, refer to "NATS (NISSAN ANTI-THEFT SYSTEM)Β ".

All of the originally supplied Intelligent Key IDs have been registered in Intelligent Key system. If requested by the vehicle owner, a maximum of four Intelligent Key IDs can be registered into the Intelligent Key system components.

Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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