Page 1985 of 4500
Fig. 40: Adjusting Screw A For Vertical Adjustment
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Result:
Page 1986 of 4500
Fig. 41: Result Description Chart
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
REPLACEMENT
1.SEPARATE BATTERY NEGATIVE TERMINAL
2.REMOVE SWITCH & VOLUME CASE
3.REMOVE STEERING WHEEL COVER LOWER NO. 2
4.REMOVE HORN BUTTON ASSY (See step 5 in REPLACEMENT
)
5.REMOVE STEERING WHEEL ASSY (See step 7 in OVERHAUL
)
6.REMOVE CRUISE CONTROL MAIN SWITCH ASSY
a. Remove the 2 screws and steering wheel damper.
Fig. 42: Removing Steering Wheel Damper
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
b. Disconnect the connectors.
c. Remove screw (A) and disengage the claw.
Page 1987 of 4500
Fig. 43: Removing Screw (A) And Disengaging Claw
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
d. Remove 2 screws (B) and the steering wheel LWR cover.
e. Remove the 2 screws and cruise control main switch ass
y.
Page 1988 of 4500
Fig. 44: Removing Cruise Control Main Switch Assy
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
7.INSPECT STEERING WHEEL CENTER POINT
8.INSTALL STEERING WHEEL ASSY (See step 96 in OVERHAUL
)
9.INSTALL HORN BUTTON ASSY (See step 6 in REPLACEMENT
)
10.CONNECT BATTERY NEGATIVE TERMINAL
11.INSPECT HORN BUTTON ASSY
12.INSPECT SRS WARNING LIGHT
Page 1989 of 4500
SYSTEM REFERENCE TABLE
System NameProceed To
Front Power Seat Control SystemINITIALIZATION
Page 1990 of 4500
Fig. 1: Identifying Defogger System Components And Replacements Location
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Page 1991 of 4500
Fig. 2: Defogger System Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Communication Table
COMMUNICATION TABLE
1.GENERAL
The rear window defogger system's thin heater wires are attached to the inside of the rear window and
defog the window surface quickly. The indicator lamp illuminates while the system is operating. The
system automatically turns off after approximately 15 minutes.
2.FUNCTION OF MAIN COMPONENT
SenderReceiverSignalLine
Multi-display(1)A/C control assemblyRear defogger switch
signalBEAN
Center cluster integration
panel
(2)
A/C control assemblyRear defogger switch
signalBEAN/AVC-LAN
(1)w/ LEXUS navigation system
(2)w/o LEXUS navigation system
Page 1992 of 4500

FUNCTION OF MAIN COMPONENT
3.DESCRIPTION
The LS430 has the rear defogger system with the following function.
DESCRIPTION
HINT:
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1.VEHICLE BROUGHT TO WORKSHOP
2.CUSTOMER PROBLEM ANALYSIS CHECK AND SYMPTOM CHECK (See CUSTOMER
PROBLEM ANALYSIS CHECK )
3.CHECK COMMUNICATION FUNCTION OF LARGE-SCALE MULTIPLEX
COMMUNICATION SYSTEM (BEAN)
a. Use the hand-held tester to check for normal function of the multiplex communication system.
1. (ECU not connected, communication line malfunctioning) Without code outputs, proceed to
A.
2. (ECU not connected, communication line malfunctioning) With code outputs, proceed to B.
B: Go to MULTIPLEX COMMUNICATION SYSTEM (See DIAGNOSTIC TROUBLE CODE
CHART )
A: Go to next step
4.SEE PROBLEM SYMPTOMS TABLE
)
a. If the fault is not listed on the problem symptoms table, proceed to A.
b. If the fault is listed on the problem symptoms table, proceed to B.
ComponentOutline
DEFOG RelayReceives rear defogger activation request signals
from A/C control assembly and supplies power to
rear window defogger.
Rear Window DefoggerReceives power from DEFOG relay and heats
defogger wire.
FunctionOutline
Defogs the rear window surfaceReceives rear defogger activation request signals
from A/C control assembly and supplies power to
rear window defogger. Receives power from
DEFOG relay and heats defogger wire.