Lexus RX300 (MCU15). Manual — part 70
BE
BODY ELECTRICAL — ACCESSORIES
153
JSRS AIRBAG SYSTEM
D The SRS (Supplemental Restraint System) airbags are provided for the driver and front passenger.
The SRS airbags help to reduce injuries mainly to the driver’s or front passenger’s head or chest in the
event of a frontal impact collision as supplements to the seat belts.
This system is a 3-sensor type airbag system to detect the impact during a front collision using the airbag
sensor assembly and front airbag sensor, and to make the airbag system and seat belt pretensioner operate
as well.
D The SRS side airbags are provided for the driver and front passenger. The SRS side airbag help to reduce
injuries mainly to the driver’s or front passenger’s chest in the event of a side collision.
The driver side and the front passenger side are each provided with one sensor.
D The RX300 has adopted a fuel cut control that stops the fuel pump when the SRS driver’s and front
passenger’s airbags are deployed.
" Layout of Components A
187BE14
Front Airbag Sensor
Assembleies
Inflator and Bag
(for Front Passenger)
Side Airbag Assembly
Side Airbag Sensor
Assembly
Seat Belt Pretensioner
Side Airbag Assembly
Seat Belt Pretensioner
Side Airbag Sensor
Assembly
Airbag
Sensor
Assembly
" System Diagram A
182BE45
Collision
Impact
Front Airbag
Sensor Assembly
Airbag Sensor
Assembly
• Inflator (For Driver
and Front Passenger)
• Seat Belt Pretensioner
(LH and RH)
Inflator
(For Right Side or Left Side)
Side Airbag
Sensor
Assembly
Collision
Impact
BODY ELECTRICAL — ACCESSORIES
154
JSEAT BELT WARNING SYSTEM
1. General
The seat belt warning system illuminates the driver warning light and flashes the front passenger warning
light to inform the driver and front passenger that the seat belt have not been fastened.
When the ignition switch is turn ON, this system determines whether or not the seat belt is buckled by
the ON or OFF condition of the switch that is provided in the seat belt buckle. The occupant detection
sensor provided in the seat cushion of the front passenger seat determines whether or not an occupant is
seated in the front passenger seat.
" System Diagram A
187BE15
Front Passenger Side
Combination
Meter
BEAN
Body ECU
Seat Belt
Buckle
Switch
Driver Side
Seat Belt
Warning Light
Occupant
Detection Sensor
Seat Belt
Buckle
Switch
2. Occupant Detection Sensor
The occupant detection sensor, which is enclosed in the seat cushion of the front passenger seat, is used
to detect whether or not the front passenger seat is occupied.
This sensor, which is shaped as illustrated below, consists of a construction in which two sheets of electrodes
sandwich a spacer. When the occupant is seated, the electrode sheets come in contact with each other through
the hole that is provided in the spacer portion, thus enabling the current to flow.
Thus, the sensor detects whether or not an occupant is seated in the front passenger seat.
159BE19
Occupant Detection Sensor
Front Passenger Seat
Upside View
Spacer
Electrode Sheet
Electrode Sheet
Sensor OFF
Occupant
Sensor ON
187BE16
159BE18
BE
BODY ELECTRICAL — ACCESSORIES
155
JCRUISE CONTROL SYSTEM
1. General
Once the system is set to a desired vehicle speed, the engine throttle position is adjusted automatically
to maintain the vehicle speed at that speed without depressing the accelerator pedal.
This system is optional equipment.
2. Layout of Components
187BE17
Cruise Control ECU
Cruise Control Switch
LHD Model
Cruise Control ECU
Cruise Control
Switch
RHD Model
Cruise Control
Actuator
Neutral Start Switch
Stop Light Switch
Stop Light
Switch
3. Function
The cruise control ECU has the following functions.
" Functions A
Function of cruise control ECU
1
Constant Speed Control
6
Low Speed Limit Control
11
Magnetic Clutch Control
2
Set
7
High Speed Limit Control
12
Diagnosis
3
Coast
8
Automatic Transmission
Control
13
Fail Safe
4
Accel
9
Manual Cancel
14
Tap-Down Control
5
Resume
10
Auto Cancel
15
Tap-Up Control
BODY ELECTRICAL — ACCESSORIES
156
JAUTOMATIC GLARE–RESISTANT EC MIRROR SYSTEM
1. General
This system automatically reduces the reflection rate of the inner and outside mirrors by using an EC (electro-
chromic) element to dampen the bright glare of the headlights of the vehicle driving behind. This system
is optional equipment.
2. Layout and Function of Components
187BE18
Detection
Sensor
(No. 2 Sensor)
EC Mirror Cell
Rear Light Detection Sensor
(No. 2 Sensor)
Surrounding Light Detection Sensor
(No. 1 Sensor)
Inner Rear View Mirror
Surrounding Light
Detection Sensor
(No. 1 Sensor)
Outside Rear View Mirror
(RH)
Mode Select Switch
EC Mirror Cell
EC Mirror Cell
Outside Rear View Mirror
(LH)
LED
Rear Light
Components
Function
LED
Turns on to inform the driver that the mirror control mode is
operating in the AUTO mode.
Mode Select Switch
Selects the inner and outside mirror control to AUTO or DAY
mode.
EC Mirror Cell
Varies the reflection rate of the mirror through the function of
electrochromic elements.
Surrounding Light Detection Sensor
(No. 1 Sensor)
Detects the intensity of the light surrounding the vehicle.
Rear Light Detection Sensor
(No. 2 Sensor)
Detects the intensity of the light entering the inner mirror
from behind the vehicle.
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст