Lexus NX: System Description

SYSTEM DESCRIPTION

GENERAL

(a) This system has a rear television camera assembly mounted on the back door to display an image of the area behind the vehicle on the display. The display panel also shows a composite view consisting of the area behind the vehicle and parking guide lines to assist the driver in parking the vehicle by monitoring the area behind the vehicle.

(b) This system consists of the following components:

(1) Rear television camera assembly

(2) Radio receiver assembly

(3) Multi-display assembly

(4) Steering sensor

(5) Hybrid Vehicle Control ECU

(6) Main body ECU (multiplex network body ECU)

(7) Blind spot monitor sensor LH*1

(8) Clearance warning ECU assembly*2

  • *1: w/ Blind Spot Monitor System
  • *2: w/ Intuitive Parking Assist System

(c) This system is equipped with a self-diagnosis system, which is operated from a designated window that appears on the multi-display.

FUNCTION OF COMPONENTS

(a) The radio receiver assembly controls the system by using information from the following components.

Item

Function

Rear Television Camera Assembly

  • Mounted on the back door to transmit a composite image of the area behind the vehicle and guide lines calculated based on signals received from each ECU, to the multi-display.
  • Has a color video camera that uses a Complementary Metal Oxide Semiconductor (CMOS) and a wide-angle lens.
  • Stops displaying the guide lines when an open signal is received for the back door.
  • Performs overall control of the system by receiving signals from the sensor and ECUs.

Multi-display assembly

  • Receives video signals which contain a composite image of the area behind the vehicle taken with the television camera assembly and guide lines calculated based on signals received from each ECU.
  • Performs control of the system by receiving the reverse signal from the BK UP LP relay.
  • Receives diagnostic mode video signals from the rear television camera assembly.
  • Displays "You can not calibrate the camera when the door is open. Please close the door." on the back camera position setting screen when the back door is open.

Radio Receiver Assembly

Transmits the setting information signal to the rear television camera assembly via CAN communication.

steering sensor

Detects the angle of the steering wheel and transmits the resulting signals to the rear television camera assembly via CAN communication.

ECM

Transmits the vehicle information signal to the rear television camera assembly via CAN communication.

Main Body ECU (Multiplex Network Body ECU)

Transmits a back door courtesy switch signal to the rear television camera assembly through CAN communication.

Blind Spot Monitor Sensor*1

Transmits the RCTA information signal to the rear television camera assembly via CAN communication.

Clearance Warning ECU Assembly*2

Transmits the sonar information signal to the rear television camera assembly via CAN communication.

  • *1: w/ Blind Spot Monitor System
  • *2: w/ Intuitive Parking Assist System

OPERATION EXPLANATION

(a) The multi-display receives the reverse signal when the power switch on (IG) and the shift lever is moved to R. After receiving the reverse signal, the multi-display assembly switches to the parking assist monitor system.

DISPLAY MODE SETTING

(a) Rear view screen

*A

Example

-

-

*a

Display Mode Switch Screen Button

*b

Estimated Course Line Display Mode

*c

Parking Assist Guide Line Display Mode

*d

Distance Guide Line Display Mode

*e

Display Mode Switching Button

*f

Guide Line Display Mode Switching Button Pressed

HINT:

The screen changes to the wide rear view screen when the display mode switching button is selected.

(1) While the parking assist monitor is displayed, pressing the display mode switch screen button switches the parking assist monitor display mode.

Parking Assist Monitor Display Mode

Parking Assist Monitor Display Mode

Distance Guide Lines

(Red)

Estimated Course Lines

(Yellow)

Distance Guide Line

(Yellow)

Vehicle Width Guide Line

(Blue)

Distance Guide Line

(Blue)

Parking Assist Guide Lines

(Blue)

Vehicle Center Guide Line

(Blue)

Estimated course line display mode

Displayed

Displayed

Displayed

Displayed

Displayed

Not displayed

Displayed

Parking assist guide line display mode

Displayed

Not displayed

Not displayed

Displayed

Not displayed

Displayed

Displayed

Distance guide line display mode

Displayed

Not displayed

Not displayed

Not displayed

Not displayed

Not displayed

Not displayed

(b) Wide rear view screen

*A

Example

-

-

*a

Guide Line Display Mode Switching Button

*b

Estimated Course Line Display Mode

*c

Parking Assist Guide Line Display Mode

*d

Distance Guide Line Display Mode

*e

Display Mode Switching Button

*f

Guide Line Display Mode Switching Button Pressed

HINT:

The screen changes to the rear view screen when the display mode switching button is selected.

(1) While the parking assist monitor is displayed on the multi-display, pressing the guide line display mode switching button switches the parking assist monitor display mode.

Parking Assist Monitor Display Mode

Parking Assist Monitor Display Mode

Distance Guide Lines

(Red)

Estimated Course Lines

(Yellow)

Distance Guide Line

(Yellow)

Vehicle Width Guide Line

(Blue)

Distance Guide Line

(Blue)

Parking Assist Guide Lines

(Blue)

Vehicle Center Guide Line

(Blue)

Estimated course line display mode

Displayed

Displayed

Displayed

Displayed

Displayed

Not displayed

Displayed

Parking assist guide line display mode

Displayed

Not displayed

Not displayed

Displayed

Not displayed

Displayed

Displayed

Distance guide line display mode

Displayed

Not displayed

Not displayed

Not displayed

Not displayed

Not displayed

Not displayed

DIAGNOSTIC FUNCTION OUTLINE

(a) This parking assist monitor system has a diagnostic function displayed on the multi-display assembly. This function enables calibration (adjustment and verification) of the parking assist monitor system.

Click here

(b) The following items for the parking assist monitor system can be checked using the Techstream.

Item

Proceed to

DTC

Data List / Active Test

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 How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT HINT: Use the following procedure to troubleshoot the parking assist monitor system. *: Use the Techstream. PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP NEXT

 Initialization

INITIALIZATION INITIALIZE PARKING ASSIST MONITOR SYSTEM (a) When the "!" mark is displayed on the multi-display assembly, correct the steering angle neutral point using the following method. (1) Fully

 Calibration

CALIBRATION ADJUST PARKING ASSIST MONITOR SYSTEM (a) This parking assist monitor system can be adjusted using the diagnostic screen of the display. (b) If the following operations are performed, it is

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 Problem Symptoms Table

PROBLEM SYMPTOMS TABLE NOTICE: Before replacing the main body ECU (multiplex network body ECU), refer to the Smart Access System with Push-button Start (for Entry Function). Click here HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are li

 Inspection

INSPECTION PROCEDURE 1. INSPECT FOG LIGHT ASSEMBLY LH (a) Apply battery voltage to the connector and check the light illumination condition. OK: Battery Connection Specified Condition Positive (+) → 2 (B) Negative (-) → 3 (CRPL) Negative (-) → 4 (E) A and B illuminates Posit

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