traction control LEXUS LS430 2005 Owners Manual

For detailed information, refer to the description given in each section\
.
PICTORIAL INDEX
x
5 Window lock switch65
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\

6 Side vents 253
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . . .
7 Headlight, turn signal and fog
light switches 54, 57, 58 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8 Windshield wiper and washer switch 58
. . . . . . . . . . . . . . . . . . . . .
9 Automatic air conditioning controls 238, 240
. . . . . . . . . . . . . . . .
10 Rear window and outside rear view mirror defogger
switch 63 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . . . . . . .
11 Clock 116
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . . . . . . . . . . .
12 Lexus park assist system/Rear view monitor/
Navigation system display
(See “Navigation System Owner’s Manual”) 316/323 . . . . . . . . .
13 Outside temperature display 117
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
14 Front passenger’s seat belt reminder light 85
. . . . . . . . . . . . . . . .
15 Center vents 252
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . .
16 Emergency flasher switch 68
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17 Audio system 260
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . .
18 Glove box 122
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . . .
19 Driving pattern selector switch 305
. . . . . . . . . . . . . . . . . . . . . . . . .
20 Auxiliary box 129
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . .
21 Seat heater switches/
Climate control seat switches 69/71 . . . . . . . . . . . . . . . . . . . . . . . . .
22 Power outlet 120
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . .
23 Auxiliary box if power outlet is selected/
Ashtray if cigarette lighter is selected 129/119 . . . . . . . . . . . . . . .
24 Cigarette lighter 119
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. .
25 Headlight cleaner switch 62
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
26 Rear seat and rear head restraints
return switch 163 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . .
27 Traction control system off switch 363
. . . . . . . . . . . . . . . . . . . . . .
28 Rear electric sunshade switch 137
. . . . . . . . . . . . . . . . . . . . . . . . . .
29 CD automatic changer 282
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
30 Height control switch 360
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
31 Damping mode select switch 361
. . . . . . . . . . . . . . . . . . . . . . . . . . .
32 Automatic transmission selector lever 305
. . . . . . . . . . . . . . . . . .
33 Ignition switch 298, 301
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
34 Volume adjustment knob 30, 39
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
35 Key cancel switch 34
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
.
36 Tire pressure warning system reset switch 372
. . . . . . . . . . . . . .
37 Cruise control switch/Dynamic radar/laser cruise
control switch 326/329 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\

38 Multiinformation display control switch 90
. . . . . . . . . . . . . . . . .
39 Rear view mirror folding switch 232
. . . . . . . . . . . . . . . . . . . . . . . . .
40 Steering switches 288
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
.
41 Adaptive Front Lighting System cancel switch 56
. . . . . . . . . . . .
42 Trunk lid opener 144
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. .
43 Parking brake 304
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . .
44 Hood opener 142
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . .
45 Lexus park assist system switch 316
. . . . . . . . . . . . . . . . . . . . . . . .
46 Parking brake release lever 304
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
47 Fuel filler door opener 146
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
48 Coin box 127
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . . . .
49 Power rear view mirror control switches 231
. . . . . . . . . . . . . . . . .

For detailed information, refer to the description given in each section\
.
PICTORIAL INDEX
xii
5 Window lock switch65
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\

6 Side vents 253
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . . .
7 Headlight, turn signal and fog
light switches 54, 57, 58 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8 Windshield wiper and washer switch 58
. . . . . . . . . . . . . . . . . . . . .
9 Automatic air conditioning controls 238, 240
. . . . . . . . . . . . . . . .
10 Rear window and outside rear view mirror defogger
switch 63 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . . . . . . .
11 Center vents 252
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . .
12 Clock 116
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . . . . . . . . . . .
13 Emergency flasher switch 68
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
14 Outside temperature display 117
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
15 Front passenger’s seat belt reminder light 85
. . . . . . . . . . . . . . . .
16 Audio system 260
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . .
17 Glove box 122
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . . .
18 Driving pattern selector switch 305
. . . . . . . . . . . . . . . . . . . . . . . . .
19 Auxiliary box 129
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . .
20 Seat heater switches/
Climate control seat switches 69/71 . . . . . . . . . . . . . . . . . . . . . . . . .
21 Power outlet 120
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . .
22 Auxiliary box if power outlet is selected/
Ashtray if cigarette lighter is selected 129/119 . . . . . . . . . . . . . . .
23 Cigarette lighter 119
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. .
24 Headlight cleaner switch 62
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
25 Rear seat and rear head restraints
return switch 163 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . .
26 Traction control system off switch 363
. . . . . . . . . . . . . . . . . . . . . .
27 Rear electric sunshade switch 137
. . . . . . . . . . . . . . . . . . . . . . . . . .
28 CD automatic changer 282
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
29 Height control switch 360
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
30 Damping mode select switch 361
. . . . . . . . . . . . . . . . . . . . . . . . . . .
31 Automatic transmission selector lever 305
. . . . . . . . . . . . . . . . . .
32 Ignition switch 298, 301
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
33 Volume adjustment knob 30, 39
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
34 Key cancel switch 34
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
.
35 Tire pressure warning system reset switch 372
. . . . . . . . . . . . . .
36 Cruise control switch/Dynamic radar/laser cruise
control switch 326/329 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\

37 Multiinformation display control switch 90
. . . . . . . . . . . . . . . . .
38 Rear view mirror folding switch 232
. . . . . . . . . . . . . . . . . . . . . . . . .
39 Steering switches 288
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
.
40 Adaptive Front Lighting System cancel switch 56
. . . . . . . . . . . .
41 Trunk lid opener 144
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. .
42 Parking brake 304
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . .
43 Hood opener 142
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . .
44 Lexus park assist system switch 316
. . . . . . . . . . . . . . . . . . . . . . . .
45 Parking brake release lever 304
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
46 Fuel filler door opener 146
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
47 Coin box 127
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . . . .
48 Power rear view mirror control switches 231
. . . . . . . . . . . . . . . . .

For detailed information, refer to the description given in each section\
.
PICTORIAL INDEX
xiv
1 Engine coolant temperature gauge80
. . . . . . . . . . . . . . . . . . . . . . .
2 Slip indicator light 362, 365
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Master warning light 87
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 Adaptive Front Lighting System off indicator light 56 . . . . . . . .
5 Tachometer 81
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . . . . . .
6 Turn signal indicator light 57
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7 Headlight indicator light 54
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8 Fog light indicator light 58
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9 Headlight high beam indicator light 57
. . . . . . . . . . . . . . . . . . . . . .
10 Automatic transmission indicator lights 305
. . . . . . . . . . . . . . . . .
11 Fuel filler door indicator 146
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12 Fuel gauge 80
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . . .
13 Low fuel level warning light 88
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
14 Damping mode indicator light 361
. . . . . . . . . . . . . . . . . . . . . . . . . .
15 Open door warning light 88
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16 Brake system warning light 84
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17 SRS warning light 85
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. .
18 ODO/TRIP RESET button 82
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
19 Discharge warning light 86
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
20 Driver’s seat belt reminder light 85
. . . . . . . . . . . . . . . . . . . . . . . . . .
21 Odometer and trip meter 82
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
22 Multi information display 90
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
23 Antilock brake system warning light 87
. . . . . . . . . . . . . . . . . . . .
24 Traction control system OFF indicator light 363
. . . . . . . . . . . . . .
25 Snow mode indicator light 315
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
26 Key indicator light 20, 298
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
27 Security indicator light 50
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
28 Instrument panel light control 109
. . . . . . . . . . . . . . . . . . . . . . . . . .
29 Power mode indicator light 315
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
30 Malfunction indicator lamp 86
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
31 Cruise control indicator light 326
. . . . . . . . . . . . . . . . . . . . . . . . . . .

For detailed information, refer to the description given in each section\
.
PICTORIAL INDEX
xvi
1 Engine coolant temperature gauge80
. . . . . . . . . . . . . . . . . . . . . . .
2 Slip indicator light 362, 365
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Master warning light 87
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 Adaptive Front Lighting System off indicator light 56 . . . . . . . .
5 Tachometer 81
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . . . . . .
6 Turn signal indicator light 57
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7 Tail indicator light 54
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
.
8 Fog light indicator light 58
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9 Headlight high beam indicator light 57
. . . . . . . . . . . . . . . . . . . . . .
10 Automatic transmission indicator lights 305
. . . . . . . . . . . . . . . . .
11 Fuel filler door indicator 146
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12 Fuel gauge 80
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . . .
13 Low fuel level warning light 88
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
14 Damping mode indicator light 361
. . . . . . . . . . . . . . . . . . . . . . . . . .
15 Open door warning light 88
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16 Brake system warning light 84
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17 SRS warning light 85
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. .
18 ODO/TRIP RESET button 82
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
19 Discharge warning light 86
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
20 Driver’s seat belt reminder light 85
. . . . . . . . . . . . . . . . . . . . . . . . . .
21 Odometer and trip meter 82
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
22 Multiinformation display 90
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
23 Antilock brake system warning light 87
. . . . . . . . . . . . . . . . . . . .
24 Traction control system OFF indicator light 363
. . . . . . . . . . . . . .
25 Snow mode indicator light 315
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
26 Key indicator light 20, 298
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
27 Security indicator light 50
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
28 Instrument panel light control 109
. . . . . . . . . . . . . . . . . . . . . . . . . .
29 Power mode indicator light 315
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
30 Malfunction indicator lamp 86
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
31 Cruise control indicator light 326
. . . . . . . . . . . . . . . . . . . . . . . . . . .

GAUGES, METERS AND SERVICE REMINDER INDICATORS
87
At this time, vibration may occur. However, if you depress the
accelerator pedal more firmly and slowly, you can drive your
vehicle at low speeds. Have your Lexus checked by your
Lexus dealer as soon as possible.
Even if the abnormality of the electronic throttle control system
is corrected during low speed driving, the system may not be
recovered
until the engine is stopped and the ignition switch is
turned to “ACC” or “LOCK” position.
Emissions inspection and maintenance (I/M) programs
Your vehicle may not pass a state emission inspection if the
malfunction indicator lamp remains on. Contact your Lexus
dealer to check your vehicle’s emission control system and
OBD (On −Board Diagnostics) system before taking your
vehicle for the inspection.
For details, see “Emissions inspection and maintenance (I/M)
programs” on page 431.
(g) Master Warning Light
If any system malfunctions, this warning light comes on or
flashes together with a warning tone, and a warning message
appears in the multi−information display. When the cause of
the problem is eliminated, the warning tone and message on
the display will turn off.
(h) “ABS” Warning Light
The light comes on when the ignition switch is turned to the
“ON” position. If the anti−lock brake system and the brake
assist system work properly, the light turns off after a few
seconds. Thereafter, if either of the systems malfunctions, the
light comes on again.
When the “ABS” warning light is on (and the brake system
warning light is off), the anti −lock brake system, the brake
assist system, the traction control system and/or the vehicle
stability control system do/does not operate, but the brake
system still operates conventionally.
When the “ABS” warning light is on (and the brake system
warning light is off), the anti− lock brake system does not
operate so that the wheels could lock up during a sudden
braking or braking on slippery road surfaces.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
97
W43W256
W42W257
W258
W44W259
W46W260
When any door or trunk is open with the ignition switch
turned on, a message appears to let you know which door
or trunk is open. If you continue driving in this condition,
the master warning light flashes and a warning tone
sounds when the vehicle speed exceeds 5 km/h (3 mph).
If any of the above warning messages appears, stop your
vehicle and close the door or trunk securely.
W52W261
If the driver’s door is opened with the ignition switch
turned off and the moon roof opened, the master warning
light flashes, a warning tone sounds and the above
message appears.
When you leave your vehicle, be sure to close the moon roof.
w262
If you start driving with the parking brake applied, the
master warning light flashes, a warning tone sounds and
the above message appears when the vehicle speed
exceeds 5 km/h (3 mph).
If the above warning message appears, stop your vehicle and
release the parking brake.
W48W263
If the vehicle stability control system or the traction
control system malfunctions, the master warning light
and “TRAC OFF” indicator light come on. At this time a
warning tone sounds and the above message appears.
If the message appears, the vehicle stability control system
and traction control system do not work. Although it is no
problem to continue driving, have your vehicle checked by
Lexus dealer as soon as possible.

SECTION 3 – 1
295
STARTING AND DRIVING
Starting and driving
Three−way catalytic converters296
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine exhaust caution 297
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Before starting the engine 298
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Smart ignition system with steering lock 298
. . . . . . . . . . . . . . . . . . . . .
Ignition switch with steering lock 301
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Parking brake 304
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . .
How to start the engine 304
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Automatic transmission 305
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electronic throttle control system 315
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Lexus park assist system 316
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear view monitor system 323
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cruise control 326
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . .
Dynamic radar/laser cruise control 329
. . . . . . . . . . . . . . . . . . . . . . . . .
Electronically modulated air suspension 360
. . . . . . . . . . . . . . . . . . . . .
Traction control system 362
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vehicle stability control system 364
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brake system 366
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . .
Tire pressure warning system 370
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brake pad wear limit indicators 373
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pre−collision safety system 374
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

STARTING AND DRIVING
362
TRACTION CONTROL SYSTEM
The traction control system automatically helps prevent
the spinning of rear wheels when the vehicle is started or
accelerated on slippery road surfaces.
When the ignition switch is turned to “ON”, the system
automatically turns on.
CAUTION
Under certain slippery road conditions, full traction of
the vehicle and power against rear wheels cannot be
maintained, even though the traction control system is
in operation. Do not drive the vehicle under any speed
or maneuvering conditions which may cause the
vehicle to lose traction control. In situations where the
road surface is covered with ice or snow, your vehicle
should be fitted with snow tires or tire chains. Always
drive at an appropriate and cautious speed for the
present road conditions.
31L138a
 Slip indicator light
Leave the system on during the ordinary driving so that it
can operate when needed.
You may hear a sound in the engine compartment for a few
seconds just after the vehicle begins to move. This means that
the traction control system is in the self −check mode, but does
not indicate a malfunction.
When the traction control system is operating, the following
conditions occur:
 The system controls the spinning of the rear wheels. At this
time, the slip indicator light blinks.
 You may feel vibration or noise in your vehicle, caused by
operation of the brakes. This indicates the system is
functioning properly.
The slip indicator light comes on for a few seconds when the
ignition switch is turned to “ON”. If the indicator light does not
come on when the ignition is turned on, contact your Lexus
dealer.

STARTING AND DRIVING
363
Traction control off mode
31L344
If your wheels get stuck in a ditch when you are driving on
a severe off road and sand, turn off the traction control
system. This system that controls engine performance
interferes with the process of freeing your wheels.
To turn off: Push “TRAC OFF” switch.
The “TRAC OFF” indicator light will come on.
The vehicle stability control system is always activated even if
the traction control system is turned off.
To turn on: Push “TRAC OFF” switch once again.
The “TRAC OFF” indicator light will go off. “TRAC
OFF” indicator light comes on for a few seconds when
the ignition switch is turned to “ON”. It will come on again when
you push the “TRAC OFF” switch to turn off the system.
In the following cases, contact your Lexus dealer:
 The indicator light does not come on when the ignition
switch is turned to “ON”.
 The indicator light remains on after the ignition is turned on.
 The indicator light comes on in the normal driving mode
while driving.

STARTING AND DRIVING
364
“Check VSC” warning message
31L337a
If the vehicle stability control system or the traction
control system malfunctions, the master warning light
and “TRAC OFF” indicator light come on. At this time a
warning tone sounds and the above message appears.
If the message appears, the vehicle stability control system
and traction control system do not work. Although it is no
problem to continue driving, have your vehicle checked by
your Lexus dealer as soon as possible.
VEHICLE STABILITY CONTROLSYSTEM
The vehicle stability control system helps provide
comprehensive control of the systems such as antilock
brake system, traction control, engine control, etc. This
system automatically controls the brakes and engine to
help prevent the vehicle from skidding when cornering on
a slippery road surface or operating steering wheel
abruptly.
This system activates when the vehicle speed is about more
than 15 km/h (9 mph).
You may hear a sound in the engine compartment for a few
seconds just after the vehicle begins to move. This means that
the system is in the self −check mode, but does not indicate a
malfunction.