2015 Lexus GS450h horn

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GS450h_OM_OM30F70U_(U)
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3-5. Opening, closing the windows and moon roof
Power windows ............................. 167
Moon roof ........................................ 171
4-1. Before driving Driving the vehicle ...................... 176
Cargo and luggage.....................187
Vehicle load limits ....................... 190
Trailer towing .................................. 191
Dinghy towing ...............................192
4-2. Driving procedures Power (ignition) switch ..............193
EV drive mode ............................200
Hybrid transmission .................. 203
Turn signal lever .......................... 209
Parking brake ................................. 211
Brake Hold .....................................214
Horn ..................................................216
4-3. Operating the lights and wipers
Headlight switch .......................... 217
Fog light switch ........................... 222
Windshield wipers and washer ................................ 223 4-4. Refueling
Opening the fuel tank cap ..... 230
4-5. Using the driving support systems
Cruise control ............................. 235
Dynamic radar cruise control............................ 239
Dynamic radar cruise control with full-speed range............. 254
LKA (Lane-Keeping Assist) ...........270
Driving mode select switch ... 280
Driving assist systems .............. 283
PCS (Pre-Collision System) ......... 290
BSM (Blind Spot Monitor) .............300
• The Blind Spot Monitor function .................................... 304
• The Rear Cross Traffic Alert function ........................ 307
Lexus night view .......................... 310
4-6. Driving tips Hybrid vehicle driving tips .......316
Winter driving tips ...................... 318
4Driving

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GS450h_OM_OM30F70U_(U)
4Driving
4-1. Before driving Driving the vehicle ....................... 176
Cargo and luggage .................... 187
Vehicle load limits .......................190
Trailer towing .................................. 191
Dinghy towing............................... 192
4-2. Driving procedures Power (ignition) switch.............. 193
EV drive mode ........................... 200
Hybrid transmission ..................203
Turn signal lever ......................... 209
Parking brake ..................................211
Brake Hold ..................................... 214
Horn.................................................. 216
4-3. Operating the lights and wipers
Headlight switch .......................... 217
Fog light switch............................ 222
Windshield wipers and washer .................................223
4-4. Refueling Opening the fuel tank cap..... 230 4-5. Using the driving support
systems
Cruise control ............................. 235
Dynamic radar cruise control ............................ 239
Dynamic radar cruise control with full-speed range ............. 254
LKA (Lane-Keeping Assist) .......... 270
Driving mode select switch ...280
Driving assist systems............... 283
PCS (Pre-Collision System).......... 290
BSM (Blind Spot Moni tor)............. 300
• The Blind Spot Monitor function ....................................304
• The Rear Cross Traffic Alert function......................... 307
Lexus night view .......................... 310
4-6. Driving tips Hybrid vehicle driving tips....... 316
Winter driving tips ...................... 318

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GS450h_OM_OM30F70U_(U)
4-2. Driving procedures
Horn
To sound the horn, press on or close
to the mark.

GS450h_OM_OM30F70U_(U)
4676-3. Do-it-yourself maintenance
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Maintenance and care
11ABS MAIN 210Brake system
12ABS MAIN 110Brake system
13IGCT NO.130IGCT NO.2, IGCT NO.3, IGCT NO.4,
IGCT NO.5
14ECU-B7. 5VGRS, smart access system with push-but-
ton start
15INV W/P10Hybrid system
16ETCS10Multiport fuel injection system/sequential
multiport fuel injection system
17EPS-B10Electric power steering system
18D/C CUT30DOME, MPX-B
19HORN10Horn
20ODS5Occupant classification system
21TV7. 5Remote Touch screen
22P/ I - B N O. 280IG2 MAIN, EFI MAIN, EDU, F/PMP, A/F
23ABS NO.230Motor relay
24P/ I - B N O.150H-LP HI RH, H-LP HI LH, DRL
25H-LP LO30H-LP LO RH, H-LP LO LH
26LH J/B-B40Left-hand junction block
27RH J/B-B40Right-hand junction block
28VGRS40VGRS
29OIL PMP60Oil pump
30IGCT NO.57. 5Power management system, shift position
sensor
31WIP-S7. 5Windshield wipers, driver support system
32WA S H - S5Windshield washer, driver support system
33COMB SW5Windshield wipers
FuseAmpereCircuit

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GS450h_OM_OM30F70U_(U)
7-2. Steps to take in an emergency
If the hybrid system will not start
One of the following may be the cause of the problem:
●The electronic key may not be functioning properly. (P. 560)
●There may not be sufficient fuel in the vehicle’s tank.
Refuel the vehicle.
●There may be a malfunction in the immobilizer system. ( P. 8 1 )
●There may be a malfunction in the steering lock system.
●The hybrid system may be malfunctio ning due to an electrical problem
such as electronic key battery de pletion or a blown fuse. However,
depending on the type of malfuncti on, an interim measure is available
to start the hybrid system. ( P. 555)
One of the following may be the cause of the problem:
●The 12-volt battery may be discharged. ( P. 562)
●The 12-volt battery terminal connecti ons may be loose or corroded.
Reasons for the hybrid system not st arting vary depending on the situa-
tion. Check the following and perf orm the appropriate procedure:
The hybrid system will not start even though the correct starting
procedure is being followed. ( P. 1 9 3 )
The interior lights and headlights are dim, or the horn does not
sound or sounds at a low volume.

5557-2. Steps to take in an emergency
GS450h_OM_OM30F70U_(U)
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When trouble arises
One of the following may be the cause of the problem:
●One or both of the 12-volt battery terminals may be disconnected.
●The 12-volt battery may be discharged. ( P. 562)
Contact your Lexus dealer if the problem cannot be repaired, or if repair proce-
dures are unknown.
When the hybrid system does not start, the following steps can be used as
an interim measure to star t the hybrid system if the power switch is func-
tioning normally:
Set the parking brake.
Shift the shift lever to P.
Turn the power switch to ACCESSORY mode.
Press and hold the power switch fo r about 15 seconds while depressing
the brake pedal firmly.
Even if the hybrid system can be star ted using the above steps, the system
may be malfunctioning. Have the vehicle inspected by your Lexus dealer.
The interior lights and headlights do not turn on, or the horn does
not sound.
Emergency start function
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632What to do if... (Troubleshooting)
GS450h_OM_OM30F70U_(U)
●Did anyone inside the vehicle open a door during setting the
alarm?
The sensor detects it and the alarm sounds. ( P. 8 3 )
To stop the alarm, turn the power switch to ON mode or start the
hybrid system.
●Is the message displayed on the multi-information display?
Check the message on the multi-information display.
( P. 513)
●When a warning light turns on or a warning message is dis-
played, refer to P. 503, 513.
An alarm is activated and the horn sounds
A warning buzzer sounds when leaving the vehicle
A warning light turns on or a warning message is displayed

640Alphabetical index
GS450h_OM_OM30F70U_(U)
Hands-free system (for cellular phone)
*
HD Radio® system*
Head restraints ....................................... 158
Headlights ................................................. 217 Adaptive Front-lighting System (AFS) .................................... 219
Discharge headlights precautions ......................................... 491
Headlight leveling warning message ............................ 516
Light switch ............................................. 217
Replacing light bulbs ....................... 489
Wattage ................................................. 583
Headlights aim ............................ 477, 624
Head-up display..................................... 104
Heaters Air conditioning system ................. 335
Heated steering wheel ................... 380
Seat heaters ......................................... 382
Outside rear view mirrors ............ 360
High-voltage components ...................76
Hood .......................................................... 426 Open ........................................................426
Warning message ............................ 520
Hooks Cargo hooks ........................................ 373
Coat hooks .......................................... 390
Luggage hook ..................................... 373
Retaining hooks (floor mat) ............. 28
Utility hook ............................................392 Horn............................................................. 216
Hybrid battery (traction battery) ....... 76
Hybrid battery (traction battery)
air vents ..................................................... 77
Hybrid system............................................ 72 Emergency shut off system .............. 77
Energy monitor/consumption screen.......................... 111
EV drive mode ...................................200
High voltage components ................76
Hybrid System Indicator ................... 94
Hybrid system precautions ..............76
Hybrid vehicle driving tips ..............316
If the hybrid system will not start .......................................554
Overheating.........................................566
Power (ignition) switch.....................193
Starting the hybrid system...............193
Vehicle proximity notification system ......................................................73
Hybrid System Indicator .......................94
Hybrid transmission ............................ 203 If the shift lever cannot be shifted from P ............556
Paddle shift switches........................205
S mode.................................................... 206
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