Lexus RX (RX 350L, RX450h) 2016-2022 Repair Manual: System Description

SYSTEM DESCRIPTION

OUTLINE

(a) Lexus Enform Remote, which enables the user to check the vehicle status and operate the vehicle from a remote location, has been used.

(b) Lexus Enform Remote is available by installing a dedicated smartphone application after entering a service contract*.

  • *: Lexus Enform Remote cannot be operated until the user has entered a service contract.

(c) Lexus Enform Remote services are performed through data communication between mainly a Lexus Enform Remote capable DCM (telematics transceiver), the service center and a smartphone with the application installed.

HINT:

  • Start and operate the Lexus Enform Remote system according to the instructions displayed on the application.
  • The contents of Lexus Enform Remote may vary depending on the application.
  • For details on available Lexus Enform Remote, go to http://www.Lexus.com/enform

FUNCTION OF MAIN COMPONENTS

Component

Function

DCM (Telematics Transceiver)

  • Sends vehicle information signals to the service center.
  • Receives remote operation signals from the service center and sends them to each ECU.

Telephone and GPS Antenna (for Roof Side)

GPS Antenna

Receives signals from GPS satellites and transmits these signals to the DCM (telematics transceiver).

Telephone Antenna (Main)

Transmits signals from the DCM (telematics transceiver) and receives signals from the service center. (Main)

Telephone and GPS Antenna (for Front Side)

Telephone Antenna (Sub)

Receives signals from the service center. (Sub)

Certification ECU (Smart Key ECU Assembly)

Receives the remote engine start and stop signal from the user's smartphone or electrical key transmitter sub-assembly via the DCM (telematics transceiver) and initiates the engine start operation.

Air Conditioning Amplifier Assembly

  • Sends ambient temperature signals to the DCM (telematics transceiver).
  • Operates the air conditioning system and/or rear defogger after the engine has been started by remote operation, based on signals from the DCM (telematics transceiver).

Main Body ECU (Multiplex Network Body ECU)

Locks the door when a remote door lock and unlock operation signal is received.

FUNCTION

(a) The main services of Lexus Enform Remote are as follows:

Category

Remote Service

Function

Remote Information

Vehicle Status Report

Allows the vehicle status (doors open/closed, etc.) and vehicle information (distance traveled, etc.) to be checked from a remote location via a smartphone, after the engine switch has been turned off. By updating the information, the latest vehicle status can be displayed.*1

Remote Notification

Guest Driver Monitor

  • Allows the user to set limits on the vehicle speed, traveling time, etc. when a guest driver (a family member, valet, etc.) is driving the vehicle, via a smartphone.
  • If the guest driver exceeds a user set limit, a notification will be sent to the user so the driving status can be monitored.*2*3

Vehicle Status Alerts

Sends a notification to the user if certain operations are not performed within a certain amount of time after the engine switch is turned off, such as locking the doors, closing the windows, etc.*2*4

Remote Operation

Remote Engine Start and Stop

  • Allows the user to start the engine and keep it running for a certain amount of time from a remote location via a smartphone or the electrical key transmitter sub-assembly. Performing the remote stop operation after the remote start operation has been performed changes the vehicle to the engine switch off condition.*5
  • Starts the air conditioning system when the engine is remotely started, if the air conditioning system was on when the engine switch was last turned off.
  • The air conditioning system or rear defogger may be operated by signals from the service center depending on the ambient temperature.

Remote Door Lock and Unlock

Allows the doors to be locked/unlocked from a remote location via a smartphone.*6

  • *1: If the latest vehicle information has not been sent from the vehicle due to the condition of the vehicle (such as if the DCM (telematics transceiver) is outside of the cellular telephone reception area), the most recently received information will be displayed.
  • *2: No notifications will be sent if the latest vehicle information has not been sent from the vehicle due to the condition of the vehicle (such as if the DCM (telematics transceiver) is outside of the cellular telephone reception area). Notifications may be delayed if the smartphone has poor reception.
  • *3: Only one notification per set condition will be sent during a single trip.
  • *4: If the smart access system with push-button start has been canceled, vehicle status alerts notifications will not be sent to the user. If the electrical key transmitter sub-assembly is inside the vehicle or detected as being "inside cabin", vehicle status alerts notifications will not be sent.
  • *5: If the vehicle cannot receive the remote engine start and stop signal due to the condition of the vehicle (such as if the DCM (telematics transceiver) is outside of the cellular telephone reception area), the engine will not be started remotely. Additionally, the remote engine start and stop operation signal may not be received depending on vehicle conditions.
  • *6: If the vehicle cannot receive a door lock/unlock signal due to the condition of the vehicle (such as if the DCM (telematics transceiver) is outside of the cellular telephone reception area), the door lock or unlock operation will not be performed. After a door unlock operation is performed, if the doors are not opened within a certain amount of time, the doors will automatically be locked.
    Parts Location
    PARTS LOCATION ILLUSTRATION *1 TELEPHONE AND GPS ANTENNA (for Roof Side) - GPS - Telephone Main *2 MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) *3 AIR CONDITIONING AMPLIFIER ASSEMBLY * ...

    System Diagram
    SYSTEM DIAGRAM ...

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