2003 LEXUS LS430 navigation

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

Fig. 25: Identifying Front DEF Indicator (W/O Lexus Navigation System)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Fig. 26: Identifying Front DEF Indicator (W/ Lexus Navigation System)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
2. If mode indication is different from the actual air outlet in actuator check, turn the ignition switch
to the ON or START position while pressing the "Rr DEF" and "OFF" switches simultaneously.
STEP motor initialization occurs and the "DEF" indicator blinks.

Fig. 27: Identifying Rear DEF, OFF Switch (W/O Lexus Navigation System)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Fig. 28: Identifying Rear DEF, OFF Switch (W/ Lexus Navigation System)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Front A/C

OVERHAUL )
5.REMOVE LUGGAGE COMPARTMENT TRIM COVER ASSY RH (See step 22 on
OVERHAUL
)
6.REMOVE NAVIGATION ECU W/BRACKET
a. Disconnect the connector.
b. Remove the 2 nuts and navigation ECU with bracket.
Fig. 14: Removing Navigation ECU Bracket Nuts

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
7.REMOVE NAVIGATION ECU
a. Remove the 2 screws.

Fig. 15: Removing Screws
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
b. Remove the navigation ECU with bracket along the guide as shown in the illustration.

Fig. 16: Removing Navigation ECU With Bracket
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
c. Remove the 4 screws and 2 brackets.
HINT:
After the replacement, perform the screen noise automatic adjustment when screen noise occurs (see
SCREEN NOISE AUTOMATIC ADJUSTMENT
).