Control actuator LEXUS LS430 2003 Factory Owner's Guide

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

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

Fig. 112: Air Inlet Damper Control Servomotor Circuit
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
INSPECTION PROCEDURE
1.PERFORM ACTUATOR CHECK

a. Remove the glove box to see and check the air inlet servomotor operation.
b. Set the actuator check mode (SEE ACTUATOR CHECK
).
c. Press the DEF switch to set the STEP operation.
d. Press the DEF switch in order and check the operation of the air inlet servomotor.

Fig. 129: Cool Air Bypass Damper Control Servomotor Circuit (Passenger Side)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
INSPECTION PROCEDURE
1.PERFORM ACTUATOR CHECK

a. Warm up the engine.
b. Set the actuator check mode (SEE ACTUATOR CHECK
).
c. Press the driver temperature up switch, and change to STEP operation.
d. Press the driver temperature up switch, and check the air flow by hand.
Display code Air flow position
DISPLAY CODE AIR FLOW POSITION
OK:
Cool air bypass damper changes in accordance with each display code.
NG: REPLACE AIR CONDITIONING AMPLIFIER (SEE REPLACEMENT
)
OK: Go to next step
2.INSPECT COOL AIR BYPASS SERVOMOTOR
a. Remove the cool air bypass servomotor.
b. Connect the positive (+) lead from the battery to terminal 4 and negative (-) lead to terminal 5, then
check that the lever turns to the "OPEN" position smoothly.
c. Connect the positive (+) lead from the battery to terminal 5 and negative (-) lead to terminal 4, then
check that the lever turns to the "SHUT" position smoothly.
Display codeAir flow lever position
0OPEN
1OPEN
2OPEN
3SHUT
4SHUT
5SHUT
6SHUT
7SHUT
8SHUT
9SHUT

Fig. 136: Air Vent Mode Damper Control Servomotor Circuit
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
INSPECTION PROCEDURE
1.PERFORM ACTUATOR CHECK

a. Warm up the engine.
b. Set the actuator check mode (see ACTUATOR CHECK).

RC (A20-6) -
GND (A20-4)Y-R - W-BAIR SUS relay
Engine idling, height control switch
from "NORM" to "HIGH" during
compressor operation
8 V or more
CANH (A20-7) -
CANL (A20-8)BR - YCAN communication
lineIG switch OFF54 to 67
ohms
SW1 (A20-9) -
GND (A20-4)O - W-BAbsorber control switch
input signalEngine idling, absorber control
switch "NORM" position10 to 14 V
SW1 (A20-9) -
GND (A20-4)O - W-BAbsorber control switch
input signalEngine idling, absorber control
switch "SPORT" position0 to 1.5 V
SIL (A20-13) -
GND (A20-4)W-G - W-
BDiagnosis tester
communication lineIG switch ONPulse
generation
TD (A20-14) -
GND (A20-4)L-B - W-BHeight control is not
operatingIG switch ON10 to 14 V
HSW (A20-15) -
GND (A20-4)LG-B - W-
BHeight control switch
input signalIG switch ON, height control
switch "NORM" position10 to 14 V
HSW (A20-15) -
GND (A20-4)LG-B - W-
BHeight control switch
input signalIG switch ON, height control
switch "HIGH" position0 to 1.5 V
SLFR (A20-16) -
GND (A20-4)G-W - W-
BHeight control solenoid
valve (FR)IG switch ONBelow 1 V
SLFR (A20-16) -
GND (A20-4)G-W - W-
BHeight control solenoid
valve (FR)Engine idling, height control switch
from "NORM" to "HIGH" or
reverse
8 V or more
SLFL (A20-17) -
GND (A20-4)R-W - W-
BHeight control solenoid
valve (FL)IG switch ONBelow 1 V
SLFL (A20-17) -
GND (A20-4)R-W - W-
BHeight control solenoid
valve (FL)Engine idling, height control switch
from "NORM" to "HIGH" or
reverse
8 V or more
SBL1 (A20-18) -
GND (A20-4)LG-R - W-
BHeight control sensor
power source (FL)IG switch ON4.5 to 5.5 V
VH (A20-19) -
GND (A20-4)P - W-BHeight control indicator
output signalIG switch ON, height control
switch "HIGH"0 to 1.5 V
SBR1 (A20-20) -
GND (A20-4)V-R - W-BHeight control indicator
output signalIG switch ON, height control
switch "NORM"10 to 14 V
SBR1 (A20-20) -
GND (A20-4)V-R - W-BHeight control sensor
power source (FR)IG switch ON4.5 to 5.5 V
SGR1 (A20-21) -
GND (A20-4)R-L - W-BHeight control sensor
ground (FR)AlwaysBelow 1
ohms
SGL1 (A20-22) -
GND (A20-4)LG-B - W-
BHeight control sensor
ground (FL)AlwaysBelow 1
ohms
FAR+ (A21-1) -
FAR- (A21-2)O - R-YSuspension control
actuator (FR)IG switch ONBelow 1
ohms
FBR+ (A21-3) -
FBR- (A21-4)R-G - L-GSuspension control
actuator (FR)IG switch ONBelow 1
ohms
FAL+ (A21-5) -
FAL- (A21-14)G-B - G-RSuspension control
actuator (FL)IG switch ONBelow 1
ohms

FBL+ (A21-6) -
FBL- (A21-16)G-W - G-
OSuspension control
actuator (FL)IG switch ONBelow 1
ohms
SLRL (A21-7) -
GND (A20-4)P-L - W-BHeight control solenoid
valve (RL)IG switch ONBelow 1 V
SLRL (A21-7) -
GND (A20-4)P-L - W-BHeight control solenoid
valve (RL)Engine idling, height control switch
from "NORM" to "HIGH" or
reverse
8 V or more
SLRR (A21-8) -
GND (A20-4)P - W-BHeight control solenoid
valve (RR)IG switch ONBelow 1 V
SLRR (A21-8) -
GND (A20-4)P - W-BHeight control solenoid
valve (RR)Engine idling, height control switch
from "NORM" to "HIGH" or
reverse
8 V or more
RM+ (A21-17) -
GND (A20-4)BR-Y - W-
BMotor lock (+)
Engine idling, height control switch
from "NORM" to "HIGH" during
compressor operation
Below 1 V
RM- (A21-18) -
GND (A20-4)BR-B - W-
BMotor lock (-)AlwaysBelow 1
ohms
SHR2 (A21-19) -
GND (A20-4)W - W-BHeight control sensor
(HID rear)IG switch ON0.5 to 4.5 V
SHFR (A21-20) -
GND (A20-4)B-W - W-
BHeight control sensor
(FR)IG switch ON0.5 to 4.5 V
SHFR (A21-20) -
GND (A20-4)B-W - W-
BHeight control sensor
(FR)Engine idling, height control switch
"NORM"Approx. 2.5
V
SHF2 (A21-21) -
GND (A20-4)V-G - W-BHeight control sensor
(HID front)IG switch ON0.5 to 4.5 V
SHFL (A21-22) -
GND (A20-4)L - W-BHeight control sensor
(FL)IG switch ON0.5 to 4.5 V
SHFL (A21-22) -
GND (A20-4)L - W-BHeight control sensor
(FL)Engine idling, height control switch
"NORM"Approx. 2.5
V
SBL3 (A21-23) -
GND (A20-4)B - W-BHeight control sensor
power source (HID)IG switch ON4.5 to 5.5 V
SGL3 (A21-24) -
GND (A20-4)V-Y - W-BHeight control sensor
ground (HID)AlwaysBelow 1
ohms
RAR+ (A22-2) -
RAR- (A22-3)Y - SBSuspension control
actuator (RR)IG switch ONBelow 1
ohms
RBR+ (A22-4) -
RBR- (A22-5)LG - PSuspension control
actuator (RR)IG switch ONBelow 1
ohms
RAL+ (A22-6) -
RAL- (A22-7)L - GSuspension control
actuator (RL)IG switch ONBelow 1
ohms
RBL+ (A22-8) -
RBL- (A22-9)O - BRSuspension control
actuator (RLIG switch ONBelow 1
ohms
SGR3 (A22-12) -
GND (A20-4)W - W-BAcceleration sensor
ground (rear)AlwaysBelow 1
ohms
SBR3 (A22-15) -
GND (A20-4)R - W-BAcceleration sensor
power source (rear)IG switch ON4.5 to 5.5 V

For details of each code, go to Fig. 16
DTC C1715, DTC C1716, DTC C1717,
DTC C1791, DTC C1792, DTC C1793
RIGHT FRONT ACCELERATION SENSOR CIRCUIT
DTC C1725, DTC C1726, DTC C1727,
DTC C1728
RIGHT FRONT ABSORBER CONTROL ACTUATOR
CIRCUIT
DTC C1735EXHAUST SOLENOID VALVE CIRCUIT
DTC C1737, DTC C1738, DTC C1739,
DTC C1740
RIGHT FRONT HEIGHT CONTROL SOLENOID
VALVE CIRCUIT
DTC C1741AIR SUS RELAY CIRCUIT
DTC C1742HEIGHT CONTROL COMPRESSOR CIRCUIT
DTC C1751, DTC C1752CONTINUOUS ELECTRIC CURRENT TO HEIGHT
CONTROL COMPRESSOR
DTC C1761ECU MALFUNCTION
DTC C1774POWER SOURCE CIRCUIT
DTC C1776SPEED SENSOR CIRCUIT
DTC C1777STEERING ANGLE SENSOR CIRCUIT
DTC C1786HEIGHT CONTROL SWITCH CIRCUIT (TEST
DIAGNOSIS)
DTC C1787ABSORBER CONTROL SWITCH CIRCUIT (TEST
DIAGNOSIS)

CIRCUIT DESCRIPTION
Absorber control actuator switches the damping force depending on the suspension control ECU signals.
Fig. 54: DTC C1725 And DTC C1728 Detecting Condition And Trouble Area

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
WIRING DIAGRAM

Fig. 55: Front Absorber Control Actuator Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
INSPECTION PROCEDURE
1.INSPECT ABSORBER CONTROL ACTUATOR OPERATION
a. Connect the han
d-held tester to the DLC3.