horn LEXUS LS430 2003 Factory Repair Manual

Fig. 40: Disengaging Claws
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
2.REMOVE STEERING WHEEL COVER LOWER NO. 2 (See step 4 on REPLACEMENT
)
3.REMOVE HORN BUTTON ASSY (See step 5 on REPLACEMENT
)
4.REMOVE STEERING PAD SWITCH MODULATOR
a. Remove the 4 screws.
b. Disconnect the connectors and remove the steering pad switch modulator.

Fig. 41: Removing Screws
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
5.INSTALL HORN BUTTON ASSY (See step 6 on REPLACEMENT
)
6.INSPECT HORN BUTTON ASSY (See ON
-VEHICLE INSPECTION )
7.SRS WARNING LIGHT (See DIAGNOSIS SYSTEM
)
REPLACEMENT
HINT:
See COMPONENTS - FRONT BUMPER , COMPONENTS - REAR BUMPER .
See LOCATION .
Installation is in the reverse order of removal.
1.REMOVE FRONT BUMPER COVER (See step 5 on REPLACEMENT
)
2.REMOVE REAR BUMPER COVER (See step 12 on REPLACEMENT
)

NG: REPLACE THE CD
OK: Go to next step
3.CHECK RADIO RECEIVER ASSY
a. Insert another CD and check if it is ejected.
OK: The disc is ejected.
NG: REPLACE RADIO RECEIVER ASSY (SEE REPLACEMENT
)
OK: NORMAL OPERATION
INSPECTION PROCEDURE
1.CHECK SPEAKERS
a. Check the speaker unit installed condition.
1. Check that each speaker is securely installed.
OK: The problem goes away.
HINT:
The radio has a noise prevention function to reduce noise when listening to the radio. If a loud noise
occurs, check whether the ground at the antenna mounting base and the noise prevention unit are installed
and wired correctly.
NOISE CONDITION CHART
Noise ConditionsNoise Source
Depressing the accelerator pedal makes the noise louder. However, the noise
stops immediately when the engine is stopped.Alternator
Noise occurs while the A/C or heater is in operation.Blower motor
Noise can be heard during sudden acceleration on an unpaved road, or after the
ignition switch is turned ON.Fuel pump
Noise can be heard when the horn is pressed and released, or held down
continuously.Horn
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570003005600570052005300560003005a004b004800510003[the engine is
stopped.Ignition
Noise can be heard when the turn signal blinks.Flasher
Noise can be heard while window washer is in operation.Washer
Noise can be heard while the engine is running and continues after it is stopped.Water temperature
sensor
Noise can be heard while the wiper system is in operation.Wiper

23.INSTALL OUTER MIRROR SWITCH ASSY
24.INSTALL COIN BOX
25.INSTALL INSTRUMENT PANEL UNDER COVER NO.1 (SEE REPLACEMENT
)
26.INSTALL CLUSTER FINISH PANEL CENTER LOWER
27.INSTALL INSTRUMENT CLUSTER FINISH PANEL END
28.INSTALL SEAT ASSY FR LH
29.INSTALL SEAT TRACK BRACKET COVER INNER FRONT
30.INSTALL SEAT TRACK BRACKET COVER OUTER FRONT
31.INSTALL SEAT TRACK OUTER COVER LH
32.INSTALL SEAT TRACK COVER RH
33.INSTALL SEAT BELT ANCHOR COVER CAP LH
OVERHAUL
1.DISCONNECT BATTERY NEGATIVE TERMINAL
2.PLACE FRONT WHEELS FACING STRAIGHT AHEAD
3.REMOVE SWITCH & VOLUME CASE
4.REMOVE STEERING WHEEL COVER LOWER NO.2
5.REMOVE HORN BUTTON ASSY (SEE OVERHAUL
)
6.REMOVE STEERING WHEEL ASSY (SEE OVERHAUL
)
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18001300150013000f00030013001c001c0018001700100013[5021)
7.REMOVE STEERING COLUMN COVER (SEE OVERHAUL
)
8.REMOVE SPIRAL CABLE SUB-ASSY (SEE REPLACEMENT
)
9.REMOVE TURN SIGNAL SWITCH ASSY (SEE REPLACEMENT
)
10.REMOVE INSTRUMENT CLUSTER FINISH PANEL CENTER LOWER
11.REMOVE INSTRUMENT CLUSTER FINISH PANEL END
12.REMOVE INSTRUMENT PANEL UNDER COVER SUB-ASSY NO.1 (SEE REPLACEMENT
)
13.REMOVE COIN BOX ASSY
14.REMOVE OUTER MIRROR SWITCH ASSY
15.REMOVE INSTRUMENT PANEL SAFETY PAD SUB-ASSY NO.1 (SEE REPLACEMENT
)
16.REMOVE INSTRUMENT PANEL AIR BAG ASSY LOWER NO.1 (SEE REPLACEMENT
)
17.REMOVE INSTRUMENT PANEL UNDER COVER SUB-ASSY NO.2 (SEE REPLACEMENT
)
18.REMOVE INSTRUMENT CLUSTER FINISH PANEL (SEE REPLACEMENT
)
19.REMOVE COMBINATION METER ASSY (SEE OVERHAUL
)
20.REMOVE PUSH ROD PIN
a. Disconnect the stop lamp switch connector and brake pedal load sensing switch connector.

34.CHECK AND ADJUST BRAKE PEDAL HEIGHT (SEE ON-VEHICLE INSPECTION )
35.CHECK PEDAL FREE PLAY (SEE ON
-VEHICLE INSPECTION )
36.CHECK PEDAL RESERVE DISTANCE (SEE ON
-VEHICLE INSPECTION )
37.INSTALL COMBINATION METER ASSY (SEE OVERHAUL
)
38.INSTALL INSTRUMENT CLUSTER FINISH PANEL (SEE REPLACEMENT
)
39.INSTALL INSTRUMENT PANEL UNDER COVER SUB-ASSY NO.2 (SEE REPLACEMENT
)
40.INSTALL INSTRUMENT PANEL AIR BAG ASSY LOWER NO.1 (SEE REPLACEMENT
)
41.INSTALL INSTRUMENT PANEL SAFETY PAD SUB-ASSY NO.1 (SEE REPLACEMENT
)
42.INSTALL OUTER MIRROR SWITCH ASSY
43.INSTALL COIN BOX ASSY
44.INSTALL INSTRUMENT PANEL UNDER COVER SUB-ASSY NO.1 (SEE REPLACEMENT
)
45.INSTALL INSTRUMENT CLUSTER FINISH PANEL CENTER LOWER
46.INSTALL INSTRUMENT CLUSTER FINISH PANEL END
47.INSTALL TURN SIGNAL SWITCH ASSY (SEE REPLACEMENT
)
48.INSTALL SPIRAL CABLE SUB-ASSY (SEE REPLACEMENT
)
49.INSTALL STEERING COLUMN COVER (SEE OVERHAUL
)
50.INSTALL STEERING WHEEL ASSY (SEE OVERHAUL
)
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18001300150013000f00030013001c001c0018001700100013[5021)
51.INSTALL HORN BUTTON ASSY (SEE OVERHAUL
)
52.INSTALL STEERING WHEEL COVER LOWER NO.2
53.INSTALL SWITCH & VOLUME CASE
54.CONNECT BATTERY NEGATIVE TERMINAL
55.INSPECT SRS WARNING LIGHT (SEE DIAGNOSIS SYSTEM
)
56.PERFORM INITIALIZATION (SEE PRECAUTION
)
OVERHAUL
1.REMOVE ENGINE ROOM SIDE COVER
2.SEPARATE ENGINE ROOM NO.3 R/B
a. Remove the bolt and separate the engine room No.3 R/B.
3.DRAIN BRAKE FLUID
a. Draw out fluid with syringe.
4.REMOVE BRAKE MASTER CYLINDER SUB-ASSY
a. Remove the clamp from the 2 brake tubes.

Fig. 133: Connecting Yawrate Sensor Connector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
6.INSTALL REAR CONSOLE ARMREST ASSY (SEE REPLACEMENT
)
7.INSTALL CONSOLE BOX CARPET
8.INSTALL CONSOLE UPPER REAR PANEL SUB-ASSY (SEE REPLACEMENT
)
9.PERFORM YAWRATE SENSOR ZERO POINT CALIBRATION (SEE CALIBRATION
)
REPLACEMENT
1.(SEE PRECAUTION
)
2.SEPARATE BATTERY NEGATIVE TERMINAL (SEE PRECAUTION
)
3.PLACE FRONT WHEELS FACING STRAIGHT AHEAD
4.REMOVE HORN BUTTON ASSY (SEE OVERHAUL
)
5.REMOVE STEERING WHEEL ASSY (SEE OVERHAUL
)
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18001300150013000f00030013001c001c0018001700100013[5021)
6.REMOVE STEERING COLUMN COVER (SEE OVERHAUL
)

Fig. 135: Installing Steering Sensor To Spiral Cable
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
10.ADJUST CENTER FRONT WHEEL
11.INSTALL SPIRAL CABLE SUB-ASSY (SEE REPLACEMENT
)
12.CENTER SPIRAL CABLE (SEE REPLACEMENT
)
13.INSTALL STEERING COLUMN COVER
14.INSTALL STEERING WHEEL ASSY (SEE OVERHAUL
)
15.INSTALL HORN BUTTON ASSY (SEE OVERHAUL
)
16.INSPECT STEERING WHEEL CENTER POINT
17.INSPECT HORN BUTTON ASSY (SEE REPLACEMENT
)
18.INSPECT SRS WARNING LIGHT (SEE DIAGNOSIS SYSTEM
)
19.INSPECT ABS WARNING LIGHT AND VSC WARNING LIGHT (SEE DIAGNOSIS SYSTEM
)
PRECAUTION

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.

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

MISCELLANEOUS LOCATION
Rear LHIn left rear door. See Fig. 19 .
Door Lock Motor & Door Unlock Detection SW
Rear RHIn right rear door. See Fig. 19 .
Engine Hood Courtesy SWNear hood latch, on front center of engine
compartment. See Fig. 12
.
Head Rest Limit SW Rear LHIn rear seat assembly. See Fig. 32 .
Head Rest Limit SW Rear RHIn rear seat assembly. See Fig. 32 .
Luggage Compartment Door Key Unlock SWIn luggage compartment. See Fig. 28 .
Luggage Electrical Key SWIn luggage compartment decklid. See Fig. 28 .
Oil Pressure SwitchOn lower left front of engine. See Fig. 15 .
Parking Brake SwitchBehind left end of dash, on parking brake
mechanism. See Fig. 17
.
Park/Neutral Position SwitchOn right side of transmission. See Fig. 15 .
Power Seat Control SW (Rear Seat)Left side of rear seat. See Fig. 32 .
Pressure SwitchLower left side of dash. See Fig. 17 .
Rear Armrest Courtesy SWIn rear seat. See Fig. 32 .
Rear Sunshade SW (Rear)In center of rear seat. See Fig. 32 .
Stoplight SwitchAbove brake pedal, on bracket. See Fig. 18 .
ComponentLocation
A/C AmplifierIn luggage compartment. See Fig. 4 .
Airbag Squib (Front Passenger Airbag Assembly)Right side of dash. See Fig. 2 .
Airbag Squib (Steering Wheel Pad)In steering wheel. See Fig. 2 .
Curtain Shield Airbag Squib LHLeft "C" pillar. See Fig. 19 .
Curtain Shield Airbag Squib RHRight "C" pillar. See Fig. 19 .
Data Link Connector 3Below left side of dash. See Fig. 16 .
Door Oscillator Front LHIn left front door. See Fig. 19 .
Door Oscillator Front RHIn right front door. See Fig. 19 .
Door Oscillator Rear LHIn left rear door. See Fig. 19 .
Door Oscillator Rear RHIn right rear door. See Fig. 19 .
GeneratorRight front of engine. See Fig. 13 .
Horn (High)On center radiator support. See Fig. 13 .
Horn (Low)On center radiator support. See Fig. 13 .
Ignition Coil & Ignitor No. 1Above No. 1 spark plug. See Fig. 14 .
Ignition Coil & Ignitor No. 2Above No. 2 spark plug. See Fig. 14 .
Ignition Coil & Ignitor No. 3Above No. 3 spark plug. See Fig. 14 .
Ignition Coil & Ignitor No. 4Above No. 4 spark plug. See Fig. 14 .
Ignition Coil & Ignitor No. 5Above No. 5 spark plug. See Fig. 14 .
Ignition Coil & Ignitor No. 6Above No. 6 spark plug. See Fig. 14 .