Lexus ES300 (2002 year). Manual — part 321
056DH-01
-
DIAGNOSTICS
AIR CONDITIONING SYSTEM
05-461
614
2002 LEXUS ES300 REPAIR MANUAL (RM911U)
DIAGNOSTIC TROUBLE CODE CHART
If malfunction code is displayed during the DTC check (sensor check), check the circuit listed for that code
in the table below (Proceed to the page given for that circuit).
DTC No.
(See Page)
Detection Item
Trouble Area
Memory
00
Normal
-
-
11*
1
)
Room temperature sensor circuit
Room temp. sensor
A/C amplifier (Heater Control Housing)
Harness or connector between room temp. sensor and A/C
amplifier (Heater Control Housing)
(8.5 min. or more)
12*
2
)
Ambient temperature sensor circuit
Ambient temp. sensor
Harness or connector between ambient temp. sensor and
A/C amplifier (Heater Control Housing)
A/C amplifier (Heater Control Housing)
(8.5 min. or more)
13
)
Evaporator temperature sensor circuit
Evaporator temp. sensor
Harness or connector between evaporator temp. sensor and
A/C amplifier (Heater Control Housing)
A/C amplifier (Heater Control Housing)
(8.5 min. or more)
14
)
Water temperature sensor circuit
Harness or connector between ECM and A/C amplifier
(Heater Control Housing)
ECM
A/C amplifier (Heater Control Housing)
-
21*
3
)
Solar sensor circuit (short)
(Passenger side)
Solar sensor
Harness or connector between solar sensor and A/C amplifi-
er (Heater Control Housing) , body ECU
(8.5 min. or more)
)
Solar sensor circuit (open)
er (Heater Control Housing) , body ECU
Body ECU
A/C amplifier (Heater Control Housing)
-
22*
4
)
Compressor lock sensor circuit
Compressor Drive Belt
Compressor lock sensor
Compressor
ECM
Harness or connector between ECM and A/C lock sensor,
A/C amplifier (Heater Control Housing)
A/C amplifier (Heater Control Housing)
-
23
)
Pressure switch circuit
Pressure switch
A/C amplifier (Heater Control Housing)
Harness or connector between pressure switch and A/C
amplifier (Heater Control Housing)
-
24*
3
)
Solar sensor circuit (short)
(Driver side)
Solar sensor
Harness or connector between solar sensor and A/C amplifi-
er (Heater Control Housing) , body ECU
(8.5 min. or more)
)
Solar sensor circuit (open)
er (Heater Control Housing) , body ECU
Body ECU
A/C amplifier (Heater Control Housing)
-
31
)
Air mix damper position sensor circuit
(Passenger side)
Air mix damper position sensor
A/C amplifier (Heater Control Housing)
Harness or connector between air mix damper position sen-
sor and A/C amplifier (Heater Control Housing)
-
32
)
Air inlet damper position sensor circuit
Air inlet damper position sensor (Recirculation damper servo
sub-assy)
A/C amplifier (Heater Control Housing)
Harness or connector between air inlet damper position
sensor and A/C amplifier (Heater Control Housing)
(1 min. or more)
05-462
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DIAGNOSTICS
AIR CONDITIONING SYSTEM
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2002 LEXUS ES300 REPAIR MANUAL (RM911U)
33
)
Air outlet damper position sensor circuit
Air outlet damper position sensor (Mode damper servo sub-
assy)
A/C amplifier (Heater Control Housing)
Harness or connector between air outlet damper position
sensor (Mode damper servo sub-assy) and A/C amplifier
(Heater Control Housing)
(1 min. or more)
36
)
Air mix damper position sensor circuit
(Driver side)
Air mix damper position sensor
A/C amplifier (Heater Control Housing)
Harness or connector between air mix damper position sen-
sor and A/C amplifier (Heater Control Housing)
(1 min. or more)
41
)
Air mix damper control servomotor
(Passenger side)
Air mix control servomotor
Harness or connector between air mix damper control ser-
vomotor and A/C amplifier (Heater Control Housing)
A/C amplifier (Heater Control Housing)
(15 sec.)
42
)
Air inlet damper control servomotor
Air inlet control servomotor (Recirculation damper servo
sub-assy)
Harness or connector between air inlet damper control ser-
vomotor and A/C amplifier (Heater Control Housing)
A/C amplifier (Heater Control Housing)
(15 sec.)
43
)
Air outlet damper control servomotor
Air outlet control servomotor (Mode damper servo sub-
assy)
Harness or connector between air outlet damper control
servomotor (Mode damper servo sub-assy) and A/C ampli-
fier (Heater Control Housing)
A/C amplifier (Heater Control Housing)
(15 sec.)
46
)
Air mix damper control servomotor
(Driver side)
Air mix control servomotor
Harness or connector between air mix damper control ser-
vomotor and A/C amplifier (Heater Control Housing)
A/C amplifier (Heater Control Housing)
(15 sec.)
63*
6
)
Seat heater
(Driver side)
Seat heater
Harness or connector between seat heater and A/C amplifier
(Heater Control Housing)
A/C amplifier (Heater Control Housing)
-
64*
6
)
Seat heater
(Passenger side)
Seat heater
Harness or connector between seat heater and A/C amplifier
(Heater Control Housing)
A/C amplifier (Heater Control Housing)
-
HINT:
*1
: If the room temp. is approx. -18.6
°
C (-3.7
°
F) or lower, trouble code 11 may be output even though
the system is normal.
*2
: If the ambient temp. is approx. -52.9
°
C (-61.4
°
F) or lower, a malfunction code may be output even
though the system is normal.
*3
: If the check is being performed in a dark place, DTC 21, 24 (solar sensor circuit abnormal) could
be displayed.
*4
: Compressor lock (DTC22) is indicated only for a current occurring malfunction (See page
To confirm DTC 22, perform the following steps.
(1)
With the engine ON, enter the DTC check mode.
(2)
Press the F/R switch to enter actuator check mode, and set the operation to Step No. 3.
(3)
Press the AUTO switch to return to DTC check mode.
(4)
The DTC is displayed after approx. 3 sec.
*5
: The A/C amplifier (Heater Control Housing) memorizes the DTC of the respective malfunction it has
occurred for the period of the time indicated in the brackets.
*6
: Even though the system is in good condition, DTC is output when the seat sensor temperature
senses -40
C (-40
F) and over 99
C (210.2
F).
056CJ-01
I31446
Compressor and Magnetic Clutch
Pressure SW
Condenser
Cooler (Ambient Temperature Sensor) Thermistor
Cooler (Solar Sensor) Thermistor
(Driver Side, Passenger Side)
Engine Room J/B and R/B
HTR Relay
MG GLT Relay
HTR Fuse
Heater Control Housing
Sub-assy
(A/C Control Assembly)
Air Conditioner
Amplifier
ECM
Driver Side J/B
ECU-B Fuse
HTR Fuse
Cooler (Room Temperature Sensor)
Thermistor
Seat Heater Back
Seat Heater Cushion
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DIAGNOSTICS
AIR CONDITIONING SYSTEM
05-463
616
2002 LEXUS ES300 REPAIR MANUAL (RM911U)
LOCATION
I31447
Expansion Valve
Air Outlet Control Servomotor
(Mode Damper Servo Sub-assy)
Blower Motor
Linear Controller
(Blower Motor
Control)
Evaporator
Heater Radiator
Air Mix Damper Control
Servomotor
(Passenger Side)
Blower w/ Fan Motor
Air Inlet Control Servomotor
(Recirculation Damper
Servo Sub-assy)
Evaporator
Temperature Sensor
(Cooler Thermistor No,1)
Air Mix Damper Control
Servomotor
(Driver Side)
05-464
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DIAGNOSTICS
AIR CONDITIONING SYSTEM
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2002 LEXUS ES300 REPAIR MANUAL (RM911U)
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