Lexus ES manuals

Lexus ES: System Description

Lexus ES (XZ10) Service Manual / Audio & Visual & Telematics / Park Assist / Monitoring / Blind Spot Monitor System(for Hv Model) / System Description

SYSTEM DESCRIPTION

GENERAL

(a) The blind spot monitor system has a blind spot monitor function.

(1) Blind spot monitor function

  • The blind spot monitor function is a function that assists the driver when changing lanes.

    This function uses quasi-millimeter wave radar to detect vehicles that are traveling in adjacent lanes in the areas that are not visible using the outer rear view mirror assemblies (blind spots) and vehicles that are approaching rapidly from up to 60 m behind this vehicle in the areas that are not visible using the outer rear view mirror assemblies (blind spots).

    The function advises the driver of the existence of a vehicle by illuminating the outer rear view mirror indicator on the outer rear view mirror assembly.

  • If the turn signal switch is operated while the outer rear view mirror indicator on an outer rear view mirror assembly is illuminated, the indicator starts blinking to give additional warning to the driver.

FUNCTION OF COMPONENTS

Component

Function

Blind Spot Monitor Sensor
  • Consists of a 24 GHz radar module and an integrated processing module.
  • Illuminates or blinks the outer rear view mirror indicator on an outer rear view mirror assembly.
  • Sounds the RCTA buzzer (blind spot monitor buzzer) when the RCTA function is operating. (Parking Support Alert System)
  • Changes the outer rear view mirror indicator on an outer rear view mirror assembly from illuminated to blinking when a turn signal switch operation signal is received from the combination meter assembly with the blind spot monitor system operating.
  • Dims the outer rear view mirror indicator on the outer rear view mirror assembly.

Outer Rear View Mirror Assembly

  • Outer Mirror (Outer Rear View Mirror Indicator)

Turns on or blinks the indicator based on a signal from the blind spot monitor sensor.

Steering Pad Switch Assembly

Enables, disables or cuts off the operation of the blind spot monitor system by transmitting switch operation signals to the combination meter assembly.

RCTA Buzzer (Blind Spot Monitor Buzzer)

Sounds based on a signal from the blind spot monitor sensor.

Combination Meter Assembly

  • Multi-information Display
  • Transmits the ON/OFF signal to the blind spot monitor sensor RH.
  • Transmits a turn signal switch operation signal from the headlight dimmer switch assembly to the blind spot monitor sensor via CAN communication.
  • Displays an error message on the multi-information display if the blind spot monitor sensor detects a malfunction while it is operating.
  • Illuminates to inform the driver while the blind spot monitor system power is on.

Main Body ECU (Multiplex Network Body ECU)

Transmits the destination information and the dimmer signal to the blind spot monitor sensors via CAN communication.

Skid Control ECU

Transmits a vehicle speed signal to the blind spot monitor sensors via CAN communication.

Hybrid Vehicle Control ECU

Transmits a shift position signal (R) to the blind spot monitor sensors via CAN communication.

Steering Sensor

Detects the angle of the steering wheel and transmits the resulting signals to the blind spot monitor sensors via CAN communication.

Airbag Sensor Assembly

  • Yaw Rate and Acceleration Sensor

Transmits the yaw rate signal to the blind spot monitor sensor via CAN communication.
  • Rear Television Camera Assembly*1
  • Parking Assist ECU*2

Receives the blind spot monitor sensor information via CAN communication and sends it to the multi-display assembly through the video signal cable.

Multi-display Assembly
  • Receives the video signals from the rear television camera assembly and displays the RCTA icon on the display panel.*1
  • Receives the video signals from the parking assist ECU and displays RCTA icon on the display panel.*2
  • *1: w/ Parking Assist Monitor System
  • *2: w/ Panoramic View Monitor System

OPERATION DESCRIPTION

(a) Operation description of the blind spot monitor system

(1) Operation conditions:

  • The blind spot monitor system is on.
  • The shift lever is in any position other than R.
  • Vehicle speed is more than approximately 16 km/h (10 mph).

(2) Conditions in which a sensor can detect a vehicle

The blind spot monitor system indicates detection of a vehicle in the detection area when either condition is met:

  • When a vehicle is detected in an adjacent lane overtaking this vehicle.
  • When a vehicle is detected entering the detection area because it changed lanes.

(3) Detection area

Vehicles in the following areas can be detected:

*a

Within Approx. 3.5 m (11.48 ft.) from Side of Vehicle

*b

Within Approx. 1 m (3.28 ft.) Forward of Rear Bumper

*c

Within Approx. 3 m (9.84 ft.) Behind Rear Bumper

*d

Within Approx. 3 m (9.84 ft.) to 60 m (196.86 ft.) from Rear Bumper

Detection Area (for Vehicle in Blind Spot)

Detection Area (for Rapidly Approaching Vehicle from Behind)

OPERATION OF OUTER REAR VIEW MIRROR INDICATOR

(a) Initial check

(1) When the blind spot monitor system is turned on with the power switch on (IG), the outer rear view mirror indicators on the outer rear view mirror assembly illuminate for 3 seconds.

(2) When the power switch is turned from off on (IG) with the blind spot monitor system on, the outer rear view mirror indicators on the outer rear view mirror assembly illuminate for 3 seconds.

(b) Operation for each function

(1) Operation for blind spot monitor system

  • When a sensor detects a vehicle in the blind spot area, the outer rear view mirror indicator on the outer rear view mirror assembly illuminates.
  • If the turn signal switch is operated while the sensor is detecting a vehicle in the detection area and the outer rear view mirror indicator on the outer rear view mirror assembly is illuminated, the indicator starts blinking as shown in the illustration.

READ NEXT:

 System Diagram

SYSTEM DIAGRAM

 Terminals Of Ecu

TERMINALS OF ECU BLIND SPOT MONITOR SENSOR RH Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition R4-4 (OMIR) - R4-10 (BRGD) SB - W-B Outer rear v

 Lost Communication with ECM / PCM "A" (U0100,U0125,U0126,U0129,U0142,U0293)

DESCRIPTION These DTCs are stored if there is a malfunction in the CAN communication system connected to the blind spot monitor sensor. HINT: If CAN communication system DTCs are stored, they may also

SEE MORE:

 LIN Communication Bus Malfunction (B2325)

DESCRIPTION If the main body ECU (multiplex network body ECU) detects a communication error with an ECU connected to the door bus lines for 8 seconds or more, DTC B2325 will be stored. DTC No. Detection Item DTC Detection Condition Trouble Area B2325 LIN Communication Bus Malfunction

 Parts Location

PARTS LOCATION ILLUSTRATION *1 FORWARD RECOGNITION CAMERA *2 FORWARD RECOGNITION WITH HEATER HOOD SUB-ASSEMBLY *3 BRAKE ACTUATOR ASSEMBLY - SKID CONTROL ECU *4 ECM ILLUSTRATION *1 STEERING SENSOR *2 AIRBAG ECU ASSEMBLY - YAW RATE SENSOR *3 MAIN BODY ECU (MULTIP

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