Lexus ES300 (2002 year). Manual — part 79
BODY ELECTRICAL – AIR CONDITIONING
BE-24
211BE20
Side Defroster
Center Defroster
Side Defroster
Fresh Air
B
A
Recirc. Air
F
I
G
H
R
Q
P
Blower Motor
Evaporator
Heater Core
J
K
O
N
L
M
Rear
Register
Side Register
Footwell
Register
Duct
Rear
Register
Rear
Footwell
Register
Duct
Center
Register
Footwell
Register
Duct
Side Register
To
Driver Side
To Front
Passenger Side
C
D E
E’ D’
C’
187BE23
187BE41
187BE28
187BE27
187BE26
187BE25
187BE24
4. Mode Position and Damper Operation
Function of Main Damper
Control
Damper
Control Position
Damper
Position
Operation
Air Inlet
Control
FRESH
A
Brings in fresh air.
Control
Damper
RECIRC
B
Recirculates internal air.
Air Mix Control
Damper
(Left/Right
Independent
Control)
MAX COLD – MAX HOT
TEMP. SETTING
{18
C (65F) – 32C (85F)}
E
D C
E’
D’ C’
Varies the mixture ratio of the fresh air
and the recirculation air in order to
regulate the temperature continuously
from HOT to COLD.
DEF
F, K, L, O, R
Defrosts the windshield through the center
defroster, side defroster, and side register.
Mode
FOOT / DEF
G, K, L, O, Q
Defrosts the windshield through the
center defroster, side defroster, and side
register, while air is also blown out from
the front and rear foot well register ducts.
Mode
Control
Damper
FOOT
H, K, L, O, P
Air blows out of the front and rear foot
well register ducts, and side register. In
addition, air blows out slightly from the
center defroster and side defroster.
BI-LEVEL
I, J, M, N, P
Air blows out of the center registers, side
registers, and foot well register ducts.
FACE
I, J, M, N, R
Air blows out of the center registers, and
side register.
BODY ELECTRICAL – AIR CONDITIONING
BE-25
211BE21
E
E
E
E
E
B
A
A
B
D
D
D
D
C
187BE24
187BE25
187BE26
187BE27
187BE28
5. Air Outlets and Air Volume Rations
A
B
C
D
E
Air Outlet Mode
Center
Face
Side
Face
Rear
Face
Foot
Defroster
FACE
—
—
BI-LEVEL
—
FOOT
—
—
FOOT / DEF
—
—
DEF
—
—
—
The size of the circle
indicates the proportion of airflow volume.
BODY ELECTRICAL – ACCESSORIES
BE-68
211BE45
Inside Rear View Mirror
Surrounding Light Detection
Sensor (No.1 Sensor)
Rear Light Detection
Sensor (No.1 Sensor)
Mode Select Switch
LED
LH Outside Rear
View Mirror
(EC Element)
RH Outside Rear
View Mirror
(EC Element)
211BE46
EC Mirror Cell
Mode Select Switch
Rear Light
Detection Sensor
(No.2 Sensor)
LED
Outside Rear
View Mirror
Surrounding Light
Detection Sensor
(No.1 Sensor)
Outside Rear
View Mirror
AUTOMATIC GLARE-RESISTANT EC MIRROR
1. General
An automatic glare-resistant EC (electrochromic) mirror have been adopted for the inside and outside rear
view mirrors as standard equipment. This system uses 2 sensors that are attached onto the inside rear view
mirror to detect the difference between the intensity of light entering the inside rear view mirror from the rear
of the vehicle, and of the light surrounding the vehicle.
During nighttime driving, if a large difference in intensity exists between the surrounding light and the light
entering the inside rear view mirror from the headlights of the vehicle driving behind, this system automati-
cally reduce the reflection rate of the inside rear view mirror and thus dampens the glare on the mirror.
The reflection rate of the outside rear view mirrors varies in accordance with the change in the reflection rate
of the inside rear view mirror.
System Diagram
2. Function of Components
BODY ELECTRICAL – ACCESSORIES
BE-69
189BE55
189BE56
Glass
Electrochromic Elements
Rear
Light
Bright
Dark
Glare
Resistance
No-Glare
Resistant
Dark
Bright
Surrounding Light
Fig. 1
Components
Function
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 inside rear view mirror
from behind the vehicle.
LED
Turns on to inform the driver that the mirror control mode is operating
in the AUTO mode.
Mode Select Switch
Selects the inside and outside rear view mirror control to AUTO or
DAY mode.
(MIRROR)
AUTO Mode
Two sensors are used to steplessly adjust the reflection rate of the inside
rear view mirror between 70
7%, and of the outside rear view mirror
between 50
12%.
DAY Mode
Fixes the reflection rate of the inside rear view mirror to 70% and of
the outside rear view mirror to 50%.
EC Mirror Cell
Varies the refection rate of the mirror through the function of EC
elements.
3. Construction
EC Mirror Cell
An EC mirror cell consists of 2 layers of glass
which sandwich the EC elements in the middle.
The EC elements control coloring and discolor-
ing characteristics through their electro-chemi-
cal oxidation reduce reaction. These characteris-
tics are utilized to electronically vary the
mirror’s reflection rate.
4. Operation
General
The EC mirror system provides 2 types of con-
trol modes, the AUTO and DAY modes, which
can be selected using the mode select switch.
In the AUTO mode, the system switches (Fig. 1)
the inside rear view mirror’s glare resistant and
non-glare resistant functions in accordance with
the difference in intensity between the surround-
ing and rear lights and automatically varies the
reflection rate of the inside and outside rear view
mirrors.
When the mode select switch is fixed to the DAY
mode, the reflection rate of the inside and outside
rear view mirrors are fixed to maximum reflec-
tion (DAY mode) regardless of the intensity of
the surrounding or rear light. This system, when
selected to the AUTO mode, is activated only
when the ignition switch is ON.
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