2005 LEXUS ES300 light

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 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 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