2005 LEXUS ES300 Repair Manual

SENSOR INSPECTION FOR AIR CONDITIONING SYSTEM ± AC005-04 December 16, 2004
Page 7 of 12
Graph 3:
TEMPERATURE 5F (5C)SPECIFICATION kW
14 (±10)8.00 to 10.00
23 (±5)6.15 to 7.65
32 (0)4.75 to 5.85
41 (5)3.70 to 4.55
50 (10)2.91 to 3.55
59 (15)2.32 to 2.80
68 (20)1.85 to 2.22
77 (25)1.48 to 1.77
86 (30)1.20 to 1.43
Inspection
Procedure
(Continued)
32
(0)68
(20)104
(40) ±4
(±20)
Temperature 5F (5C)
Resistance
kW
12.0
3.0
2.0
0.0Max
Min
1.0 4.0 8.0
7.0
5.0 6.0 9.0 10.011.0

SENSOR INSPECTION FOR AIR CONDITIONING SYSTEM ± AC005-04 December 16, 2004
Page 8 of 12
5. Inspect Solar Sensor.
Four types of solar sensors are used on Lexus vehicles depending on the vehicle
specifications. The inspection procedure for each type of sensor differs from the
others. Select the appropriate inspection procedure from the table below according to
vehicle specifications and perform the inspection.
EQUIPPED WITH AUTOMATIC
LIGHT CONTROL SYSTEMA/C SYSTEM WITH RIGHT/LEFT
INDEPENDENT TEMPERATURE CONTROLINSPECTION
PROCEDURE
NoNoA
NoYesB
YesYesC
YesNoD
Procedure A:
a. Disconnect the solar
sensor connector.
b. Measure the resistance between
terminals 1 and 2 of the solar
sensor under the
following conditions:
Cover the sensor with a cloth
to avoid direct light.
Expose the sensor to light
from a distance of 300 mm
(11.81 in.) or less with an
inspection light.
NOTE:
Terminal 1 of the sensor is always on
the right, when the lock is facing up.
When using an analog tester, connect
the positive (+) lead to terminal 2 and
negative (±) lead to terminal 1 of the
solar sensor.
HINT:
If the light is weak, the sensor may not react. Be sure to use an incandescent light for
an inspection light.
Standard:
CONDITIONSPECIFICATION
When the sensor is covered with a cloth
(to avoid direct light)Infinite ohms
When the sensor is exposed to lightLess than infinite resistance
Inspection
Procedure
(Continued)
Lock

SENSOR INSPECTION FOR AIR CONDITIONING SYSTEM ± AC005-04 December 16, 2004
Page 9 of 12
Procedure B:
a. Disconnect the solar
sensor connector.
b. Measure the resistance between
terminals 2 and 3 of the solar
sensor under the
following conditions:
Cover the sensor with a cloth
to avoid direct light.
Expose the sensor to light
from a distance of 300 mm
(11.81 in.) or less with an
inspection light.
NOTE:
When using an analog tester, connect
the positive (+) lead to terminal 3 and
negative (±) lead to terminal 2 of the
solar sensor.
HINT:
If the light is weak, the sensor may not react. Be sure to use an incandescent light for
an inspection light.
Standard:
CONDITIONSPECIFICATION
When the sensor is covered with a cloth
(to avoid direct light)Infinite ohms
When the sensor is exposed to lightLess than infinite resistance
Inspection
Procedure
(Continued)
Lock

SENSOR INSPECTION FOR AIR CONDITIONING SYSTEM ± AC005-04 December 16, 2004
Page 10 of 12
Procedure C:
a. Turn the ignition switch ON.
b. Measure the voltage between
terminals TSR (+) and CLTE (±)
of the connector under the
following conditions:
Cover the sensor with a cloth
to avoid direct light.
Expose the sensor to light
from a distance of 300 mm
(11.81 in.) or less with an
inspection light.
HINT:
If the light is weak, the sensor may not react. Be sure to use an incandescent light
for an inspection light.
Do not disconnect the solar sensor connector.
Standard:
CONDITIONSPECIFICATION
When the sensor is covered with a cloth
(to avoid direct light)Below 0.8 V
When the sensor is exposed to light4.3 +/± 0.3 V
c. Measure the voltage between
terminals TSL (+) and CLTE (±)
of the connector under the
following conditions:
Cover the sensor with a cloth
to avoid direct light.
Expose the sensor to light
from a distance of 300 mm
(11.81 in.) or less with an
inspection light.
HINT:
If the light is weak, the sensor may not react. Be sure to use an incandescent light
for an inspection light.
Do not disconnect the solar sensor connector.
Standard:
CONDITIONSPECIFICATION
When the sensor is covered with a cloth
(to avoid direct light)Below 0.8 V
When the sensor is exposed to light4.3 +/± 0.3 V
Inspection
Procedure
(Continued)
CLTE TSR
TSL
CLTE

SENSOR INSPECTION FOR AIR CONDITIONING SYSTEM ± AC005-04 December 16, 2004
Page 11 of 12
Procedure D:
a. Turn the ignition switch ON.
b. Using the tester, measure the
voltage between terminals
TSD (+) and CLTE (±) of the
connector under the
following conditions:
Cover the sensor with a cloth
to avoid direct light.
Expose the sensor to light
from a distance of 300 mm
(11.81 in.) or less with an
inspection light.
HINT:
If the light is weak, the sensor may not react. Be sure to use an incandescent light
for an inspection light.
Do not disconnect the solar sensor connector.
Standard:
CONDITIONSPECIFICATION
When the sensor is covered with a cloth
(to avoid direct light)Below 0.8 V
When the sensor is exposed to light4.3 +/± 0.3 V
Inspection
Procedure
(Continued)
TSD
CLTE

SENSOR INSPECTION FOR AIR CONDITIONING SYSTEM ± AC005-04 December 16, 2004
Page 12 of 12
6. Inspect Room Humidity Sensor.
Measure the humidity and output
voltage of the humidity sensor when
the sensor is installed on the vehicle
and the temperature at the humidity
sensor position (room temperature
sensor position) is 775F (255C).
If the output voltage is within the
specifications according to the graph
and table below, the sensor is normal.
HINT:
For the inspection procedure of the
room temperature sensor, refer to
ªRoom Temperature Sensor Inspection
Procedureº in this bulletin.
A. Turn the ignition switch to the
ON position.
B. Measure the voltage between
terminal VO (3) and GND (2) of
the room humidity sensor.
C. Measure the humidity and voltage
when the room temperature
(humidity sensor position) is 775F
(255C). According to the result,
determine whether the sensor is
normal or not.
HUMIDITY (% RH)OUTPUT VOLTAGE
AT 775F (255C)
100.70 to 1.08 V
200.72 to 1.57 V
301.13 to 1.95 V
401.61 to 2.24 V
501.99 to 2.46 V
602.26 to 2.66 V
702.48 to 2.85 V
802.68 to 3.04 V
902.87 to 3.05 V
Inspection
Procedure
(Continued)
VOGND
Resistance
kW
3.50
3.00
2.50
2.00
1.50
1.00
0.50
0.00
32
(0)68
(20)104
(40)140
(60)
Temperature 5F (5C) Max
Min
176
(80)212
(100)

Lexus Supports ASE CertificationPage 1 of 2
Title:
WINDSHIELD WIPER BLADE
MAINTENANCE AND CLEANING
Models:
'98 ± '06 All Models
Technical Service
Information Bulletin
July 13, 2005
BO004-05
The following procedures are recommended to maintain windshield wiper
blade performance.
1998 ± 2006 model year Lexus vehicles.
OP CODEDESCRIPTIONTIMEOFPT1T2
N/ANot Applicable to Warranty±±±±
Recommendations for Windshield Wiper Maintenance, Cleaning, and Use:
1. Scheduled Maintenance
Check wiper rubber blades every 4 ± 6 months or 7,500 miles for wear, cracking,
and contamination.
Clean glass and rubber wiper blades if blades are not clearing glass adequately.
If this does not correct the problem, then replace the rubber elements.
2. Cleaning Procedure
Wiper Rubber: Bugs, dirt, sap, and road grime on blades will cause streaking.
Clean wiper rubber of road and environmental debris using cloth or paper towel
soaked with windshield washer fluid or mild detergent.
DO NOT USE fuel, kerosene, or petroleum based products to clean rubber
wiper blades.
Windshield: Bugs, sap, road grime, and car wash wax treatments decrease
wiper performance.
Rinse windshield with water and apply non±abrasive cleaner, such as Bon±Ami
(www.faultless.com), with a sponge.
NOTE:
Make sure to use plenty of water with all powder based cleaners so the glass is
not scratched.
BODY
Introduction
Applicable
Vehicles
Warranty
Information
Maintenance,
Cleaning
& Use

WINDSHIELD WIPER BLADE MAINTENANCE AND CLEANING ± BO004-05 July 13, 2005
Page 2 of 2
3. Contributors to Poor Performance/Decreased Rubber Blade Life (require
rubber replacement)
Dusty areas cause the rubber edge to wear quickly.
Sand and salt used for road conditioning during winter causes the edge to
wear quickly, so areas with significant snowfall require more frequent
wiper replacement.
Heat and time cause the rubber to become excessively ªpermanent set,º so
the rubber does not turn over, resulting in streaking and/or unwiped areas on
the glass.
Rubber is easily cut or torn while using ice scrapers on the glass.
Rubber can be torn when pulling blades off a frozen windshield.
Using wipers instead of an ice scraper to remove frost and ice from the windshield
during a car warm up can dull, nick, or tear the rubber.
Banging wiper on the glass to remove ice & snow can cause the blade to bend
and rubber to come out of the blade providing the potential to scratch the glass.
Ice forms in wiper blade pin joints, which causes streaking and unwiped areas.
To remove ice from pin joints, compress the blade and rubber with your hand to
loosen the frozen joints. To prevent this condition, use winter blades with a
rubber cover.Maintenance,
Cleaning
& Use
(Continued)