2013 Lexus GS450h brake light

GS450h_U (OM30D01U)
6796-3. Do-it-yourself maintenance
6
Maintenance and care
11DOOR FL30Outside rear view mirror defoggers, power
window (front left-hand)
12CAPACITOR
(HV)10Capacitor
13STRG LOCK15Steering lock system
14D/L NO.225Power door lock system
15DOOR RL30Power window (rear left-hand)
16HAZ15Turn signal lights, emergency flashers
17LH-IG210
Multiport fuel injection system/sequential
multiport fuel injection system, stop lights,
smart access system with push-button start,
steering lock system, brake system, power
management system
18LH J/B-B7. 5Body ECU
19S/ROOF20Moon roof
20P/ S E AT 2 F/ L25Po w e r s e a t s
21TI & TE20Electric tilt and telescopic steering column
22A/C7. 5Air conditioning system
FuseAmpereCircuit

682
GS450h_U (OM30D01U)
6-3. Do-it-yourself maintenance
■Trunk
FuseAmpereCircuit
1PSB30Pre-collision seat belts
2PTL25Power trunk opener and closer
3RR J/B-B10Smart access system with push-button start
4RR S/HTR20Seat heaters (rear)
5FR S/HTR10Seat heaters/ventilators (front)
6RR FOG10No circuit
7DC/DC-S (HV)7. 5DC/DC converter
8BATT FAN (HV)20Hybrid battery (traction battery) cooling fan
system
9SECURITY7. 5SECURITY
10ECU-B NO.37. 5Parking brake
11TRK OPN7. 5Power trunk opener and closer
12DCM (HV)7. 5DCM
13AC INV (HV )20Po w e r o u t l e t ( 1 2 0 V AC )
14RR-IG15Radar sensor, Blind Spot Monitor
15RR ECU-IG10
Power trunk opener and closer, parking
brake, tension reducer (rear left-hand), RR
CTRL SW, tire pressure warning system
16EPS-IG5Electric power steering system
17BACK UP7. 5Back-up lights

701
GS450h_U (OM30D01U)
7When trouble arises
7-1. Essential information Emergency flashers................... 702
If your vehicle has to be stopped in an emergency .... 703 7-2. Steps to take in an emergency
If your vehicle needs to be towed ................................ 704
If you think something is wrong ................. 710
If a warning light turns on or a warning buzzer sounds ........ 711
If a warning message is displayed .................................. 721
If you have a flat tire.................... 749
If the hybrid system will not start................................. 762
If the shift lever cannot be shifted from P ......................764
If the parking brake cannot be released .................................765
If the electronic key does not operate properly ...................... 767
If the 12-volt battery is discharged ............................. 770
If your vehicle overheats .......... 774
If the vehicle becomes stuck ............................................. 778

711
GS450h_U (OM30D01U)
7
When trouble arises
7-2. Steps to take in an emergency
If a warning light turns on or a warning buzzer
sounds
The following warning indicates a possible problem in the brake system.
Immediately stop the vehicle in a safe place and contact your Lexus
dealer.
Calmly perform the following actions if any of the warning lights comes
on or flashes. If a light comes on or flashes, but then goes off, this does
not necessarily indicate a malfunction in the system. However, if this
continues to occur, have the vehicle inspected by your Lexus dealer.
Stop the vehicle immediately. Cont inuing to drive the vehicle may
be dangerous.
Warning lightWarning light/Details
(U.S.A.)
(Canada)Brake system warning light (warning buzzer) •Low brake fluid
• Malfunction in the electronically controlled brake system

7127-2. Steps to take in an emergency
GS450h_U (OM30D01U)The following warning indicates the po
ssibility of damage to the vehicle
that may lead to an acc ident. Immediately stop th e vehicle in a safe place
and contact your Lexus dealer.
Failure to investigate the cause of th e following warnings may lead to the
system operating abnormally and possib ly cause an accident. Have the
vehicle inspected by your Lexus dealer immediately.
Stop the vehicl e immediately.
Warning lightWarning light/Details
Charging system warning light
Indicates a malfunction in the vehicle’s charging system
Have the vehicle inspected by your Lexus dealer immediately.
Warning lightWarning light/Details
(U.S.A.)
(Canada)
Malfunction indicator lamp Indicates a malfunction in:
• The hybrid system;
• The electronic engine control system;
• The electronic throttle control system; or
• The electronic hybrid transmission control system
SRS warning lightIndicates a malfunction in:
• The SRS airbag system;
• The front passenger occupant classification system; or
• The seat belt pretensioner system
(U.S.A.)
(Canada)
ABS warning light Indicates a malfunction in:
•The ABS; or
• The brake assist system
Electric power steering system warning lightIndicates a malfunction in the EPS (Electric Power Steering)
system

7137-2. Steps to take in an emergency
GS450h_U (OM30D01U)
7
When trouble arises
(Flashes)
(If equipped)
Pre-collision system warning light Indicates a malfunction in the pre-collision system
The warning light will operate as follows, even when the system
is not malfunctioning:
• The light will flash quickly when the system is operating. ( P. 2 9 6 )
• The light will turn on when the pre-collision system is dis-
abled. ( P. 2 9 7 )
• The light will flash when the system cannot temporarily be used. ( P. 7 3 5 )
Slip indicator
Indicates a malfunction in:
• The VSC system; or
•The TRAC system
The light will flash when the VSC or the TRC system is operat-
ing.
(Flashes)
(If equipped)
“A F S O F F ” i n d i c a t o r Indicates a malfunction in the adaptive front-lighting system
(Flashes)
Brake hold operated indicator
Indicates a malfunction in the brake hold system
(Flashes)(U.S.A.)
(Flashes)
(Canada)
Parking brake indicator Indicates a malfunction in the parking brake system
Warning lightWarning light/Details

7147-2. Steps to take in an emergency
GS450h_U (OM30D01U)After taking the specified steps to correct the suspected
problem, check
that the warning light goes off.
Brake system warning light Indicates a malfunction in:
• The electronically controlled brake system;
• The regenerative braking system; or
• The parking brake system
Follow the correction procedures.
Warning lightWarning light/Details
Warning lightWarning light/DetailsCorrection procedure
Open door warning light
(warning buzzer)
*1
Indicates that a door or the
trunk is not fully closed
Check that all the doors and
the trunk are closed.
Low fuel level warning lightIndicates remaining fuel is
approximately 2.6 gal. (10.0
L, 2.2 Imp.gal.) or less
Refuel the vehicle.
Seat belt reminder light (warn-
ing buzzer)
*2
Warns the driver and/or front
passenger to fasten their seat
belts
Fasten the seat belt. If the front passenger’s seat is
occupied, the front passen-
ger’s seat belt also needs to
be fastened to make the
warning light (warning
buzzer) off.
Master warning lightA buzzer sounds and the
warning light comes on and
flashes to indicate that the
master warning system has
detected a malfunction.
 P. 7 2 1

7187-2. Steps to take in an emergency
GS450h_U (OM30D01U)
CAUTION
■If both the ABS and the brake system warning lights remain on
Stop your vehicle in a safe place immediately and contact your Lexus dealer. The
vehicle will become extremely unstable during braking, and the ABS system may
fail, which could cause an accident resulting in death or serious injury.
■When the electric power steering system warning light comes on
The steering wheel may become extremely heavy.
If the steering wheel becomes heavier than usual when operating, hold firmly and
operate using more force than usual.
■If the tire pressure warning light comes on
Be sure to observe the following precautions. Failure to do so could cause a loss of
vehicle control and result in death or serious injury.
●Stop your vehicle in a safe place as soon as possible. Adjust the tire inflation pres-
sure immediately.
●If the tire pressure warning light comes on even after tire inflation pressure adjust-
ment, it is probable that you have a flat tire. Check the tires. If a tire is flat, change
it with the spare tire and have the flat tire repaired by the nearest Lexus dealer.
●Avoid abrupt maneuvering and braking. If the vehicle tires deteriorate, you could
lose control of the steering wheel or the brakes.
■If a blowout or sudden air leakage should occur
The tire pressure warning system may not activate immediately.