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Home › Nissan-Datsun › 2022 › Pathfinder S, FWD › Repair and Diagnosis › Body & Frame › Ignition Switch/Steering Lock › Security Control System › System Description › System › Intelligent Key System/Engine Start Function › System Description › System Diagram

System Diagram

GNSALKIA0177GB-177Courtesy of NISSAN NORTH AMERICA, INC.

Component

Function

Door switch

Door switch detects door switch condition and then transmits door switch signal to BCM.

Inside key antenna

Inside key antenna detects whether Intelligent Key is inside the vehicle, and transmits the key ID signal to Intelligent Key unit.

Stop lamp switch

Stop lamp switch detects that brake pedal is depressed, and then transmits stop lamp switch signal to BCM.

ABS actuator and electric unit (control unit)

ABS actuator and electric unit (control unit) transmits the vehicle speed signal to BCM via CAN communication.

TCM

TCM receives the P/N position signal from transmission range switch, and then transmits the shift position signal to BCM via CAN communication.

ECM
  • ECM controls the engine.
  • When ignition switch is turned ON, Intelligent Key unit starts communication with ECM and performs the ID verification between Intelligent Key unit and ECM.
  • If the verification result is OK, the engine can start. If the verification result is NG, the engine cannot start.

IPDM E/R

Starter cut relay is controlled by BCM, and starter relay is controlled by IPDM E/R while communicating with BCM.

BCM

When BCM receives a starter cut relay request signal from ECM, the starter cut relay is turned ON.

Ignition switch

Push switch
  • Ignition switch has push switch inside which detects that ignition switch is pressed, and then transmits the push switch signal to Intelligent Key unit.
  • Intelligent Key unit changes the ignition switch position with the operation of ignition switch.
  • Intelligent Key unit maintains the ignition switch position status while ignition switch is not operated.

NATS antenna amp.

Intelligent Key

The Intelligent Key system is a system that makes it possible to lock and unlock the door locks (door lock/unlock function) by carrying the Intelligent Key, which operates based on the results of electronic ID verification using two-way communication between the Intelligent Key and the vehicle (Intelligent Key unit).

Intelligent Key unit
  • Intelligent Key unit controls INTELLIGENT KEY SYSTEM (ENGINE START FUNCTION)
  • Intelligent Key unit performs the ID verification between Intelligent Key unit and Intelligent Key when the Intelligent Key is carried into the detection area of inside key antenna, and ignition switch is pressed. If the ID verification result is OK, ignition switch operation is available.
  • Then, when the ignition switch is turned ON, Intelligent Key unit performs ID verification between Intelligent Key unit and ECM. If the ID verification result is OK, ECM can start engine.

TCU

TCU transmits engine start request signal to BCM when engine start request is received from Infiniti ConnectionTM data center.
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