2003 LEXUS LS430 Factory Repair Manual

towing capacity low beam oil reset boot tire type child restraint

Page 233 of 4500

LEXUS LS430 2003 Factory Repair Manual 12)side)switch ON.
DrDN - DrGND
(A12-21 - A12-
11)P-L - LG-
RTemperature control
switch signal (Driver side)Push driver temperature switch
OFF.10 to 14 V
DrDN - DrGND
(A12-21 - A12-
11)P-L - LG-
R

12)side)switch ON.
DrDN - DrGND
(A12-21 - A12-
11)P-L - LG-
RTemperature control
switch signal (Driver side)Push driver temperature switch
OFF.10 to 14 V
DrDN - DrGND
(A12-21 - A12-
11)P-L - LG-
RTemperature control
switch signal (Driver side)Push driver temperature switch
ON.Below 1.0 V
DrUP - DrGND
(A12-22 - A12-
11)V-W -
LG-RTemperature control
switch signal (Driver side)Push driver temperature switch
OFF.10 to 14 V
DrUP - DrGND
(A12-22 - A12-
11)V-W -
LG-RTemperature control
switch signal (Driver side)Push driver temperature switch
ON.Below 1.0 V
PS+B - GND
(A12-24 - A11-1)R-G - W-
BSwing grill STEP motor
operation voltageAlways10 to 14 V
TFACEPa - SG-4
(A13-14 - A13-
11)B-Y - Y-
GDuct sensor signal
(Passenger side)Ignition switch ON. Passenger
side duct sensor temperature 25 °
C (77 °F).
1.8 to 2.2 V
TFACEPa - SG-4
(A13-14 - A13-
11)B-Y - Y-
GDuct sensor signal
(Passenger side)Ignition switch ON. Passenger
side duct sensor temperature 50 °
C (122 °F).
0.8 to 1.2 V
TFACEDr - SG-3
(A13-15 - A13-
10)GR-R -
R-WDuct sensor signal (Driver
side)Ignition switch ON. Passenger
side duct sensor temperature 25 °
C (77 °F).
1.8 to 2.2 V
TFACEDr - SG-3
(A13-15 - A13-
10)GR-R -
R-WDuct sensor signal (Driver
side)Ignition switch ON. Passenger
side duct sensor temperature 50 °
C (122 °F).
0.8 to 1.2 V
TR - SG-2 (A13-
16 - A13-9)W-L - Y-
BRoom temperature sensor
signalIgnition switch ON. Room
temperature 25 °C (77°F).1.8 to 2.2 V
TR - SG-2 (A13-
16 - A13-9)W-L - Y-
BRoom temperature sensor
signalIgnition switch ON. Room
temperature 40 °C (104°F).0.8 to 1.2 V
NOX - Body
ground (A13-17 -
Body ground)L-B -
Body
ground
Exhaust gas sensor signal
After 120 seconds from Ignition
switch ON and the sensor is
exposed to the exhaust gas.
1.0 to 4.5 V
AMDr1 - GND
(A37-1 - A11-1)BR - W-B
Air mix servomotor
operation signal (Driver
side)During actuator check mode.
Change display code 0 to display
code 9.Pulse
generation
AMDr2 - GND
(A37-2 - A11-1)BR-B -
W-BAir mix servomotor
operation signal (Driver
side)During actuator check mode.
Change display code 0 to display
code 9.Pulse
generation
AMDr3 - GND
(A37-3 - A11-1)BR-W -
W-BAir mix servomotor
operation signal (Driver
side)During actuator check mode.
Change display code 0 to display
code 9.Pulse
generation
AMDr4 - GND
(A37-4 - A11-1)BR-Y -
W-BAir mix servomotor
operation signal (Driver During actuator check mode.
Change display code 0 to display Pulse
generation

Page 234 of 4500

LEXUS LS430 2003 Factory Repair Manual side)code 9.
AODr1 - GND
(A37-5 - A11-1)L - W-B
Air outlet servomotor
operation signal (Driver
side)During actuator check mode.
Change display code 0 to display
code 9.Pulse
generation
AODr2 - G

side)code 9.
AODr1 - GND
(A37-5 - A11-1)L - W-B
Air outlet servomotor
operation signal (Driver
side)During actuator check mode.
Change display code 0 to display
code 9.Pulse
generation
AODr2 - GND
(A37-6 - A11-1)L-B - W-
BAir outlet servomotor
operation signal (Driver
side)During actuator check mode.
Change display code 0 to display
code 9.Pulse
generation
WVS - GND
(A37-7 - A11-1)G-W - W-
BWater valve servomotor
operation signalIgnition switch ON. Set
temperature control to MAX.
COOL
Below 1.0 V
WVS - GND
(A37-7 - A11-1)G-W - W-
BWater valve servomotor
operation signalIgnition switch ON. Set
temperature control to MAX.
HOT
10 to 14 V
ABOPa - GND
(A37-8 - A11-1)G-B - W-
BCool air bypass
servomotor operation
signal (Passenger side)During actuator check mode.
Display code 0.10 to 14 V
ABOPa - GND
(A37-8 - A11-1)G-B - W-
BCool air bypass
servomotor operation
signal (Passenger side)
Display code 9.Below 1.0 V
Symbols
(Terminal No.)Wiring
colorTerminal DescriptionConditionSpecification
ABSPa - GND
(A37-9 - A11-1)G-O - W-
BCool air bypass
servomotor operation
signal (Passenger side)During actuator check mode.
Display code 0.Below 1.0 V
ABSPa - GND
(A37-9 - A11-1)G-O - W-
BCool air bypass
servomotor operation
signal (Passenger side)
Display code 9.10 to 14 V
AMDB - GND
(A37-10 - A11-1)R-B - W-
BAir mix servomotor
operation voltage (Driver
side)
Always10 to 14 V
AODr3 - GND
(A37-12 - A11-1)L-W - W-
BAir outlet servomotor
operation signal (Driver
side)During actuator check mode.
Change display code 0 to display
code 9.Pulse
generation
AODr4 - GND
(A37-13 - A11-1)L-R - W-
BAir outlet servomotor
operation signal (Driver
side)During actuator check mode.
Change display code 0 to display
code 9.Pulse
generation
WVIG - GND
(A37-14 - A11-1)O - W-BWater valve servomotor
operation voltageIgnition switch ON.10 to 14 V
WVIG - GND
(A37-14 - A11-1)O - W-BWater valve servomotor
operation voltageIgnition switch OFF.0 V
WVO - GND
(A37-15 - A11-1)G - W-BWater valve servomotor
operation signalIgnition switch ON. Set
temperature control to MAX.
COOL.
10 to 14 V
WVO - GND
(A37-15 - A11-1)G - W-BWater valve servomotor
operation signalIgnition switch ON. Set
temperature control to MAX. Below 1.0 V

Page 235 of 4500

LEXUS LS430 2003 Factory Repair Manual HOT.
ABODr - GND
(A37-16 - A11-1)GR - W-
BCool air bypass
servomotor operation
signal (Driver side)During actuator check mode.
Display code 0.10 to 14 V
ABODr - GND
(A37-16 - A11-1)GR - W-
BCool

HOT.
ABODr - GND
(A37-16 - A11-1)GR - W-
BCool air bypass
servomotor operation
signal (Driver side)During actuator check mode.
Display code 0.10 to 14 V
ABODr - GND
(A37-16 - A11-1)GR - W-
BCool air bypass
servomotor operation
signal (Driver side)
Display code 9.Below 1.0 V
ABSDr - GND
(A37-17 - A11-1)GR-R -
W-BCool air bypass
servomotor operation
signal (Driver side)During actuator check mode.
Display code 0.Below 1.0 V
ABSDr - GND
(A37-17 - A11-1)GR-R -
W-BCool air bypass
servomotor operation
signal (Driver side)
Display code 9.10 to 14 V
S5-3 - SG (A37-
18 - A37-19)R-W - W-
BAir inlet damper position
sensor signalIgnition switch ON.4.5 to 5.5 V
TPI - SG (A37-20
- A37-19)B-Y - W-
BAir inlet damper position
sensor signalIgnition switch ON. Push REC
switch.4.0 V
TPI - SG (A37-20
- A37-19)B-Y - W-
BAir inlet damper position
sensor signalIgnition switch ON. Push FRESH
switch.1.0 V
TPBPa - SG
(A37-21 - A37-
19)B-L - W-
BCool air bypass
servomotor operation
signal (Passenger side)Change display code 9 to display
code 0.3.5 to 4.5 V
TPBPa - SG
(A37-21 - A37-
19)B-L - W-
BCool air bypass
servomotor operation
signal (Passenger side)Change display code 2 to display
code 3.0.5 to 1.8 V
AODB - GND
(A37-22 - A11-1)R-Y - W-
BAir outlet servomotor
operation voltage (Driver
side)
Always10 to 14 V
AMPa1 - GND
(A36-1 - A11-1)LG - W-B
Air mix servomotor
operation signal
(Passenger side)During actuator check mode.
Change display code 0 to display
code 9.Pulse
generation
AMPa2 - GND
(A36-2 - A11-1)LG-B -
W-BAir mix servomotor
operation signal
(Passenger side)During actuator check mode.
Change display code 0 to display
code 9.Pulse
generation
AMPa3 - GND
(A36-3 - A11-1)LG-W -
W-BAir mix servomotor
operation signal
(Passenger side)During actuator check mode.
Change display code 0 to display
code 9.Pulse
generation
Symbols
(Terminal No.)Wiring
colorTerminal DescriptionConditionSpecification
AMPa4 - GND
(A36-4 - A11-1)LG-R -
W-BAir mix servomotor
operation signal
(Passenger side)During actuator check mode.
Change display code 0 to display
code 9.Pulse
generation
AOPa1 - GND
(A36-5 - A11-1)P - W-B
Air outlet servomotor
operation signal
(Passenger side)During actuator check mode.
Change display code 0 to display
code 9.Pulse
generation

Page 236 of 4500

LEXUS LS430 2003 Factory Repair Manual AOPa2 - GND
(A36-6 - A11-1)P-B - W-
BAir outlet servomotor
operation signal
(Passenger side)During actuator check mode.
Change display code 0 to display
code 9.Pulse
generation
AOPa3 - GND
(A36

AOPa2 - GND
(A36-6 - A11-1)P-B - W-
BAir outlet servomotor
operation signal
(Passenger side)During actuator check mode.
Change display code 0 to display
code 9.Pulse
generation
AOPa3 - GND
(A36-7 - A11-1)P-G - W-
BAir outlet servomotor
operation signal
(Passenger side)During actuator check mode.
Change display code 0 to display
code 9.Pulse
generation
AOPa4 - GND
(A36-9 - A11-1)P-L - W-
BAir outlet servomotor
operation signal
(Passenger side)During actuator check mode.
Change display code 0 to display
code 9.Pulse
generation
S5-5 - SG-7(1)
(A36-11 - A36-
15)
R - W-L
Cool air bypass damper
position sensor signal
(Driver side)
Ignition switch ON.4.5 to 5.5 V
S5-5 - SG-7(2)
(A36-11 - A36-
15)
R - W-L
Cool air bypass damper
position sensor signal
(Passenger side)
Ignition switch ON.4.5 to 5.5 V
AMPB - GND
(A36-13 - A11-1)Y - W-B
Air mix servomotor
operation voltage
(Passenger side)
Always10 to 14 V
AIF - SG (A36-
16 - A37-19)G-R - W-
BAir inlet damper position
sensor signalIgnition switch ON. Push REC
switch.Below 1.0 V
AIF - SG (A36-
16 - A37-19)G-R - W-
BAir inlet damper position
sensor signalIgnition switch ON. Push FRESH
switch.10 to 14 V
AIR - SG (A36-
17 - A37-19)G-Y - W-
BAir inlet damper position
sensor signalIgnition switch ON. Push FRESH
switch.Below 1.0 V
AIR - SG (A36-
17 - A37-19)G-Y - W-
BAir inlet damper position
sensor signalIgnition switch ON. Push REC
switch.10 to 14 V
TE - SG-7 (A36-
20 - A36-15)L-Y - W-
LEvaporator temperature
sensor signalIgnition switch ON. Evaporator
temperature 0 °C (32 °F).2.0 to 2.4V
TE - SG-7 (A36-
20 - A36-15)L-Y - W-
LEvaporator temperature
sensor signalIgnition switch ON. Evaporator
temperature 15 °C (59 °F).1.4 to 1.8 V
TPBDr - SG-7
(A36-24 - A36-
15)B-R - W-
LCool air bypass
servomotor operation
signal (Driver side)Change display code 9 to display
code 0.3.5 to 4.5 V
TPBDr - SG-7
(A36-24 - A36-
15)B-R - W-
LCool air bypass
servomotor operation
signal (Driver side)Change display code 2 to display
code 3.0.5 to 1.8 V
AOPB - GND
(A36-26 - A11-1)Y-R - W-
BAir outlet servomotor
operation voltage
(Passenger side)
Always10 to 14 V
(1)w/o LEXUS Navigation System
(2)w/ Rear A/C

Page 237 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 23: Identifying Rear Air Conditioning Amplifier Connector Front View
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
REAR AIR CONDITIONING AMPLIFIER CONNECTOR SPECIFICATIONS
Symbols
(Terminal No

Page 238 of 4500

LEXUS LS430 2003 Factory Repair Manual RMGV - GND
(A46-5 - A46-
6)G-Y -
W-BRear A/C switch
signalIgnition switch ON. Rear A/C AUTO mode.
Rear A/C switch ON.Below 1.0 V
RHI - GND
(A46-8 - A46-
6)L-R -
W-BRear blower
switch signalIgni

RMGV - GND
(A46-5 - A46-
6)G-Y -
W-BRear A/C switch
signalIgnition switch ON. Rear A/C AUTO mode.
Rear A/C switch ON.Below 1.0 V
RHI - GND
(A46-8 - A46-
6)L-R -
W-BRear blower
switch signalIgnition switch ON. Rear A/C blower switch
OFF.Below 1.0 V
RHI - GND
(A46-8 - A46-
6)L-R -
W-BRear blower
switch signalIgnition switch ON. Rear A/C manual mode.
Blower switch HI.10 to 14 V
RAUTO - GND
(A46-9 - A46-
6)W-L -
W-BRear A/C AUTO
switch signalIgnition switch ON. Rear A/C manual mode10 to 14 V
RAUTO - GND
(A46-9 - A46-
6)W-L -
W-BRear A/C AUTO
switch signalIgnition switch ON. Rear A/C AUTO modeBelow 1.0 V
IG - GND
(A46-10 - A46-
6)B-R -
W-BPower source
(IG)Ignition switch ON.10 to 14 V
DIO - GND
(A46-12 - A46-
6)Y-B -
W-BExhaust damper
servomotor
signalIgnition switch ON. Front A/C blower motor
operates. Rear A/C blower motor speed to HI.
Rear A/C switch ON.
10 to 14 V
DIO - GND
(A46-12 - A46-
6)Y-B -
W-BExhaust damper
servomotor
signalIgnition switch ON. Front A/C blower motor
operates. Rear A/C blower motor speed to HI.
Rear A/C switch OFF.
Below 1.0 V
Symbols
(Terminal No.)Wiring
colorTerminal
DescriptionConditionSpecification
EXO - GND
(A46-13 - A46-
6)G-W -
W-BExhaust damper
servomotor
signalIgnition switch ON. Front A/C blower motor
operates. Push "FRESH" switch. Rear AUTO
mode. Rear A/C switch ON.
10 to 14 V
EXO - GND
(A46-13 - A46-
6)G-W -
W-BExhaust damper
servomotor
signalIgnition switch ON. Front A/C blower motor
operates. Push "FRESH" switch. Rear AUTO
mode. Rear A/C switch OFF. Ambient
temperature below -1 °C
Below 1.0 V
ROO - GND
(A46-14 - A46-
6)L-B -
W-BExhaust damper
servomotor
signalIgnition switch ON. Front A/C blower motor
operates. Rear A/C blower motor speed to HI.
Rear A/C switch OFF.
10 to 14 V
ROO - GND
(A46-14 - A46-
6)L-B -
W-BExhaust damper
servomotor
signalIgnition switch ON. Front A/C blower motor
operates. Rear A/C blower motor speed to HI.
Rear A/C switch ON.
Below 1.0 V
RFR1 - GND
(A46-15 - A46-
6)G-B -
W-BRear blower
motor signalIgnition switch ON. Rear A/C blower motor
speed except to HI.10 to 14 V
RFR1 - GND
(A46-15 - A46-
6)G-B -
W-BRear blower
motor signalIgnition switch ON. Rear A/C blower motor
speed to HI.Below 1.0 V

Page 239 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 24: Identifying Luggage Room J/B ECU Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
LUGGAGE ROOM J/B ECU TERMINALS SPECIFICATIONS
RFR1 - GND
(A46-15 - A46-
6)G-B -
W-BRear blower
mo

Page 240 of 4500

LEXUS LS430 2003 Factory Repair Manual HINT:
The followings are the possible items to be customized.
AIR CONDITIONER
AIR CONDITIONER CUSTOMIZE PARAMETERS
SMOK - Body
ground (L14-16
- Body ground)L - Body
groundSmoke sensor
operati

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