2005 LEXUS ES300 sensor

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

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 4
Title:
M.I.L. ON" DTC P0031, P0051, P2238,
AND/OR P2241
Models:
'04 ± '05 ES 330
Technical Service
Information Bulletin
February 16, 2005
EG003-05
Under certain driving conditions, some 2004 and 2005 model year ES 330 vehicles may
exhibit a M.I.L. ªONº with at least one of the following DTCs:
P0031 (Oxygen Sensor Heater Control Circuit Low [Bank 1, Sensor 1])
P0051 (Oxygen Sensor Heater Control Circuit Low [Bank 2, Sensor 1])
P2238 (Oxygen Sensor Pumping Current Circuit Low (for A/F Sensor)
[Bank 1, Sensor 1])
P2241 (Oxygen Sensor Pumping Current Circuit Low (for A/F Sensor)
[Bank 2, Sensor 1])
The A/F sensor manufacturing process and the Engine Control Module (ECM)
(SAE term: Powertrain Control Module/PCM) logic have been modified to improve
these conditions.
NOTE:
Version 12.01a or later Diagnostic Tester software is required to perform
this procedure.
Before proceeding, verify the ECM (PCM) calibration has NOT been updated
by checking for the Authorized Modifications Label (shown in step 2 of the
Repair Procedure).
2004 model year ES 330 vehicles.
2005 model year ES 330 vehicles produced BEFORE the Production Change
Effective VIN shown below.
MODELPRODUCTION CHANGE EFFECTIVE VIN
2005 ES 330JTHBA30G*55086805
OP CODEDESCRIPTIONTIMEOFPT1T2
EG4029Recalibrate ECM (PCM) Engine,
R & R Both A/F Sensors1.6
89661±33A40
89661±33A41
89661±33B30
8A99
Applicable Warranty*:
This repair is covered under the Lexus Federal Emissions Warranty. This warranty is
in effect for 96 months or 80,000 miles, whichever occurs first, from the vehicle's
in-service date.
* Warranty application is limited to correction of a problem based upon a customer's specific complaint.
ENGINE
Introduction
Applicable
Vehicles
Production
Change
Information
Warranty
Information