sensor LEXUS ES300 2005 Repair Manual

2500P-02
C91471
25-2
- SUSPENSION CONTROL SYSTEMREAR ACCELERATION SENSOR
2362 Author
: Date
:
2005 LEXUS ES330 REPAIR MANUAL (RM1124U)
REAR ACCELERATION SENSOR
REPLACEMENT
1. REMOVE REAR SEAT CUSHION ASSY (See page 72-39)
2. REMOVE REAR SEATBACK ASSY (See page 72-39)
3. REMOVE ROOF SIDE GARNISH INNER RH (See page 74-10)
4. REMOVE ACCELERATION SENSOR
(a) Disconnect the acceleration sensor connector.
(b) Remove the bolt and acceleration sensor from the side
pillar RH.
5. INSTALL ACCELERATION SENSOR
(a) Install the acceleration sensor with the bolt.
Torque: 7.8 NVm (80 kgfVcm, 69 in.Vlbf)
(b) Connect the acceleration sensor connector.

Lexus Supports ASE CertificationPage 1 of 12
Title:
SENSOR INSPECTION FOR AIR
CONDITIONING SYSTEM
Models:
'90 ± Current All Models
Technical Service
Information Bulletin
December 16, 2004
AC005-04
This service bulletin contains inspection procedures to more precisely confirm proper
operation of the following temperature sensors of the air conditioning system. Follow the
procedures in this service bulletin when inspecting these sensors. These contents will be
reflected in future repair manuals.
Room Temperature Sensor
Ambient Temperature Sensor
Air Duct Sensor
Evaporator Temperature Sensor
Solar Sensor
Room Humidity Sensor
All 1990 ± Current model year Lexus vehicles.
OP CODEDESCRIPTIONTIMEOFPT1T2
N/ANot Applicable to Warranty±±±±
HEATING & AIR CONDITIONING
Introduction
Applicable
Vehicles
Warranty
Information

SENSOR INSPECTION FOR AIR CONDITIONING SYSTEM ± AC005-04 December 16, 2004
Page 2 of 12
1. Inspect Room Temperature Sensor.
A. Measure the sensor resistance.
Resistance Value at 775F
(255C)1700 +/± 85W
NOTE:
Even slightly touching the sensor
may change the resistance value.
Be sure to hold the connector of
the sensor.
When measuring, the sensor
temperature must be the same as
the ambient temperature.
HINT:
As the temperature increases, the
resistance decreases.
TEMPERATURE 5F (5C)SPECIFICATION kW
50 (10)3.00 to 3.73
59 (15)2.45 to 2.88
68 (20)1.95 to 2.30
77 (25)1.60 to 1.80
86 (30)1.28 to 1.47
95 (35)1.00 to 1.22
104 (40)0.80 to 1.00
113 (45)0.65 to 0.85
122 (50)0.50 to 0.70
131 (55)0.44 to 0.60
140 (60)0.36 to 0.50
Inspection
Procedure
Resistance
kW
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
32
(0)68
(20)104
(40)140
(60)
Temperature 5F (5C) Max
Min

SENSOR INSPECTION FOR AIR CONDITIONING SYSTEM ± AC005-04 December 16, 2004
Page 3 of 12
2. Inspect Ambient
Temperature Sensor.
A. Measure the sensor resistance
according to the selected graph
(specification).
Resistance Value at 775F
(255C)1700 +/± 85W
NOTE:
Even slightly touching the sensor
may change the resistance value.
Be sure to hold the connector of
the sensor.
When measuring, the sensor
temperature must be the same as
the ambient temperature.
HINT:
As the temperature increases, the
resistance decreases.
TEMPERATURE 5F (5C)SPECIFICATION kW
50 (10)3.00 to 3.73
59 (15)2.45 to 2.88
68 (20)1.95 to 2.30
77 (25)1.60 to 1.80
86 (30)1.28 to 1.47
95 (35)1.00 to 1.22
104 (40)0.80 to 1.00
113 (45)0.65 to 0.85
122 (50)0.50 to 0.70
131 (55)0.44 to 0.60
140 (60)0.36 to 0.50
Inspection
Procedure
(Continued)
Resistance
kW
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
32
(0)68
(20)104
(40)140
(60)
Temperature 5F (5C) Max
Min

SENSOR INSPECTION FOR AIR CONDITIONING SYSTEM ± AC005-04 December 16, 2004
Page 4 of 12
3. Inspect Air Duct Sensor.
A. Measure the sensor resistance
according to the table and
graph (specification).
NOTE:
Even slightly touching the sensor
may change the resistance value.
Be sure to hold the connector of
the sensor.
When measuring, the sensor
temperature must be the same as
the ambient temperature.
HINT:
As the temperature increases, the
resistance decreases.
TEMPERATURE 5F (5C)SPECIFICATION kW
50 (10)9.48 to 10.49
59 (15)7.50 to 8.28
68 (20)5.95 to 6.57
77 (25)4.77 to 5.25
86 (30)3.85 to 4.21
95 (35)3.12 to 3.40
104 (40)2.53 to 2.79
113 (45)2.06 to 2.30
122 (50)1.69 to 1.91
131 (55)1.39 to 1.59
140 (60)1.15 to 1.33
Inspection
Procedure
(Continued)
Resistance
kW
15.0
10.0
5.0
0.0
32
(0)68
(20)104
(40)140
(60)
Temperature 5F (5C) Max
Min
176
(80)

SENSOR INSPECTION FOR AIR CONDITIONING SYSTEM ± AC005-04 December 16, 2004
Page 5 of 12
4. Inspect Evaporator Temperature Sensor.
Select the appropriate graph (specification) using the following table.
NOTE:
Please inspect the sensors for model years not indicated by this bulletin, according to
the instructions in the applicable repair manual.
MODELMODEL YEARCOMMENTSPART NUMBERGRAPH
ES 3001992 ± 200188625±330702
ES 300/3302002 ± 200388625±171302ES 300/330200388625±331703
GS 3001993 ± 199788625±3A0202
GS 300/400/4301998 ± 200288625±3A1202
GX 4702003 2005Thermistor No. 188625±350503GX 4702003 ± 2005Thermistor No. 288625±162102
IS 3002000 ± 200188625±480102
1990 ± 199288625±320402
LS 4001993 ± 199488625±501002
1995 ± 200088625±501402
LS 4302001 ± 200588625±501602
LX 4501996 ± 199788625±600602
1998 ± 2000Thermistor No. 288625±601402
LX 4701998 ± 2002Thermistor No. 188625±601302
2003 ± 200588625±470112
RX 3001998 ± 200388625±480102
2004CBU88625±480501
RX 3302004 2005CBU88625 4806032004 ± 2005NAP88625±480603
SC 300/4001991 ± 200088625±320402
Inspection
Procedure
(Continued)

SENSOR INSPECTION FOR AIR CONDITIONING SYSTEM ± AC005-04 December 16, 2004
Page 6 of 12
A. Measure the sensor resistance according to the selected graph (specification).
NOTE:
Even slightly touching the sensor may change the resistance value.
Be sure to hold the connector of the sensor.
When measuring, the sensor temperature must be the same as the
ambient temperature.
HINT:
As the temperature increases, the resistance decreases.
Graph 1:
TEMPERATURE 5F (5C)SPECIFICATION kW
14 (±10)7.30 to 9.10
23 (±5)5.65 to 6.95
32 (0)4.40 to 5.35
41 (5)3.40 to 4.15
50 (10)2.70 to 3.25
59 (15)2.14 to 2.58
68 (20)1.71 to 2.05
77 (25)1.38 to 1.64
86 (30)1.11 to 1.32
Graph 2:
TEMPERATURE 5F (5C)SPECIFICATION kW
14 (±10)7.40 to 9.20
23 (±5)5.65 to 7.00
32 (0)4.35 to 5.40
41 (5)3.40 to 4.20
50 (10)2.68 to 3.30
59 (15)2.10 to 2.60
68 (20)1.66 to 2.10
77 (25)1.32 to 1.66
86 (30)1.05 to 1.35
Inspection
Procedure
(Continued)
Resistance
kW
12.0
3.0
2.0
0.0
32
(0)68
(20)104
(40)
Temperature 5F (5C) Max
Min
1.0 4.0 8.0
7.0
5.0 6.0 9.0 10.011.0
±4
(±20)
32
(0)68
(20)104
(40) ±4
(±20)
Resistance
kW
3.0
2.0
0.0
Temperature 5F (5C) Max
Min
1.0 4.0 8.0
7.0
5.0 6.0 9.0 10.0

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