Lexus NX: System Description

Lexus NX Service Manual / Audio & Visual & Telematics / Telematics / Telematics System / System Description

SYSTEM DESCRIPTION

OUTLINE (Lexus Enform Remote)

(a) Lexus Enform Remote enables the user to check the vehicle status and operate the vehicle from a remote location.

(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 (Lexus Enform Remote)

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 (Roof Antenna Assembly)	Telephone Antenna (Main)	Transmits signals from the DCM (telematics transceiver) and receives signals from the service center. (Connect as main)
Telephone and GPS Antenna (Roof Antenna Assembly)	GPS Antenna	Receives signals from GPS satellites and transmits these signals to the DCM (telematics transceiver).
Telephone Antenna (Navigation Antenna Assembly)	Telephone Antenna (Sub)	Receives signals from the service center. (Connect as sub)
Certification ECU (Smart key ECU assembly)		Receives the remote engine start 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 hybrid control system 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 (Lexus Enform Remote)

(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 power 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
Remote Notification	Vehicle Status Alerts	Sends a notification to the user if certain operations are not performed within a certain amount of time after the power 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 hybrid control system and keep it operating for a certain amount of time from a remote location via a smartphone or the electrical key transmitter sub-assembly. The hybrid control system can also be stopped remotely after being started by the remote operation.*5 Starts the air conditioning system when the hybrid control system is remotely started, if the air conditioning system was on when the power 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 Operation	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 signal due to the condition of the vehicle (such as if the DCM [telematics transceiver] is outside of the cellular telephone reception area), the hybrid control system will not be started remotely. Additionally, the remote engine 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.

OUTLINE (Lexus Enform Diagnostics)

(a) When a warning is generated due to a vehicle malfunction, the DCM (telematics transceiver) receives warning information from the combination meter assembly and sends a warning notification to the service center. The radio receiver assembly also receives the warning information sent by the combination meter assembly and displays a message in the multi-display assembly according to the malfunction.

FUNCTION OF MAIN COMPONENTS (Lexus Enform Diagnostics)

Component		Function
DCM (Telematics Transceiver)		Receives warning information from the combination meter assembly and sends it to the service center.
Telephone and GPS Antenna (Roof Antenna Assembly)	Telephone Antenna (Main)	Transmits signals from the DCM (telematics transceiver) and receives signals from the service center. (Connect as main)
Telephone and GPS Antenna (Roof Antenna Assembly)	GPS Antenna	Receives signals from GPS satellites and transmits these signals to the DCM (telematics transceiver).
Telephone Antenna (Navigation Antenna Assembly)	Telephone Antenna (Sub)	Receives signals from the service center. (Connect as sub)
Combination Meter Assembly		Receives malfunction signals from various ECUs and sends warning information to the DCM (telematics transceiver) and radio receiver assembly.
Radio Receiver Assembly		Receives warning information sent by the combination meter assembly and displays a message in the multi-display assembly according to the malfunction.

SEE MORE:

Precaution

PRECAUTION HANDLING PRECAUTIONS (a) For safety, when driving the vehicle, the driver should not operate a portable device that is charging. (b) Anyone using an implanted pacemaker, biventricular pacing pulse generator, cardiac defibrillator or other medical electrical device should consult with thei

Terminals Of Ecu

TERMINALS OF ECU NOTICE: Turning the power switch on (IG) with connectors disconnected may cause DTCs to be stored. Make sure to clear the DTCs after inspection has been performed. Do not apply excessive force to the millimeter wave radar sensor assembly connector. CHECK MILLIMETER WAVE RAD

Lexus NX: System Description

READ NEXT:

How To Proceed With Troubleshooting

Operation Check

Utility

SEE MORE:

Precaution

Terminals Of Ecu