brake Lexus GS450h 2007 Instrument cluster /

5
When trouble arises
439
5-2. Steps to take in an emergency
Have the vehicle inspected by your Lexus dealer immediately.Failing to investigate the cause of the following warnings may lead to the
system operating abnormally and possibly cause an accident. Have the
vehicle inspected by your Lexus dealer immediately.
*1: Electronically Controlled Brake System
Warning lightWarning light/Details
(U.S.A.)

(Canada)
Malfunction indicator lamp
Malfunction in:
• The hybrid system;
• The electronic engine control system;
• The electronic throttle control system; or
• The transmission control system.
SRS warning lightMalfunction in:
• The SRS airbag system;
• The front passenger occupant classification system; or
• The seat belt pretensioner system.
(U.S.A.)

(Canada)
ABS warning lightMalfunction in:
•The ABS; or
• The brake assist system.
ECB*1/VSC warning light
Malfunction in:
• The electronically controlled brake system; or
• The VSC.
Electric power steering system warning light Malfunction in the EPS.
Pre-collision system warning light (if equipped)Malfunction in the pre-collision system.

5
When trouble arises
443
5-2. Steps to take in an emergency
CAUTION
■If the tire pressure warning light comes on
Be sure to observe the following precautions. Failure to do so could cause loss of
vehicle control and result in death or serious injury.
●Vehicles with run-flat tires:
• Decelerate to the lowest appropriate speed as soon as possible. Do not drive
over 55 mph (90 km/h).
• Check and adjust the tire inflation pressure immediately.
• If the tire pressure warning light comes on even after tire inflation pressure
adjustment, it is probable that you have a flat tire. Have the tire replaced 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.
●Vehicles with standard tires:
• Stop your vehicle in a safe place as soon as possible. Adjust the tire inflation pressure immediately.
• If the tire pressure warning light comes on even after tire inflation pressure adjustment, it is probable that you have a flat tire. Check the tires. If the tire is
flat, change to 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.

448
5-2. Steps to take in an emergency
Have the vehicle inspected by your Lexus dealer immediately.
Failing to investigate the cause of th e following warning may lead to the
system operating abnormally and possibly cause an accident. Have the
vehicle inspected by your Lexus dealer immediately.
*: Electronically Controlled Brake System
Wa r n i n g m e s s a g eDetails
Malfunction in the TRAC, VSC or hill-start assist con-
trol system.
In some cases, only “CHECK VSC” or “CHECK
ECB
*” is displayed.
(U.S.A)
(Canada)
Malfunction in the ABS or BA.In some cases, only “CHECK VSC” or “CHECK
ECB
*” is displayed.
Malfunction in the VGRS.
(Steering guide symbol
and arrows are flashing)
The steering sensor cable is broken and signals can-
not be received.

450
5-2. Steps to take in an emergency
Wa r n i n g m e s s a g eDetailsCorrection procedure
The trunk is not fully
closed. flashes and a
buzzer sounds to indi-
cate that trunk is not fully
closed (with the vehicle
having reached a speed
of 3 mph [5 km/h]).
Close the trunk.
(Flashing)
The moon roof is not fully
closed (with the power
switch “OFF” and the
driver’s door opened).
Close the moon roof.
(Flashing)
The parking brake is still
engaged (with the vehicle
having reached a speed
of more than 3 mph [5
km/h]).
Release the parking
brake.
The washer fluid level is
low.Add washer fluid.
The hybrid system has
overheated.Stop and check. 
( P. 4 8 0 )

5
When trouble arises
453
5-2. Steps to take in an emergency
Wa r n i n g m e s s a g eDetailsCorrection procedure
(Flashing)
(If equipped)
The radar cruise control
system is unable to judge
vehicle-to-vehicle dis-
tance.
• Switch the mode select to either the normal or
power mode.
• If the windshield wipers
are on, turn them off or
set them to either the
intermittent or the slow
mode.
(Flashing)
(If equipped)
Yo u r v e h i c l e i s n e a r i n g
the vehicle ahead (in
radar cruise mode).Slow the vehicle by apply-
ing the brakes.
The vehicle is unable to
drive over 60 mph (or
120 km/h) until the trans-
mission warms up.
Wait until the transmission
warms up.
(Flashing)
The hybrid battery (trac-
tion battery) is low.Stop the vehicle and shift
the shift lever to “P”.
(Flashing)
The gasoline engine can-
not operate or the shift
lever is in “N” for a long
time.
Stop the vehicle and shift
the shift lever to “P”.

5
When trouble arises
459
5-2. Steps to take in an emergency
InteriorbuzzerExterior buzzerWa r n i n g m e s s a g eDetailsCorrection
procedure

An open door has
been closed and
the power switch
has been turned
twice to the
“A C C ” m o d e f r o m
“OFF” mode.
Press the
power
switch while
applying the
brakes.

(Flashing)
The steering lock
has not released
within 3 seconds
of pressing the
power switch. The
power switch indi-
cator will flash
green for 15 sec-
onds.Press the
power
switch again
while turn-
ing the
steering
wheel with
the brake
pedal
depressed.

5
When trouble arises
461
5-2. Steps to take in an emergency
If you have a flat tire (Vehicles with standard tires)
Remove the flat tire and replace it with the spare provided.
■Before jacking up the vehicle
●Stop the vehicle on a hard, flat surface.
● Set the parking brake.
● Shift the shift lever to “P”.
● Stop the hybrid system.
● Turn on the emergency flashers.
■ Location of the spare tire, jack and tools
Wheel nut wrench Jack
Jack handle
Spare tireTi g h t e n
Loosen
Tools
Towing eyelet

472
5-2. Steps to take in an emergency
If the shift lever cannot be shifted from P
If the shift lever cannot be shifted with your foot on the brake, there may be
a problem with the shift lock system (a system to prevent accidental opera-
tion of the shift lever). Have the vehicle inspected by your Lexus dealer
immediately. 
The following steps may be used as an emergency measure to ensure that
the shift lever can be shifted.
Set the parking brake.
Turn the power switch to the “ACC” mode.
Depress the brake pedal.
Pry the cover up with a flathead
screwdriver or equivalent.
Press the shift lock override but-
ton.
The shift lever can be shifted
while the button is pressed.
STEP1
STEP2
STEP3
STEP4
STEP5

5
When trouble arises
475
5-2. Steps to take in an emergency
Starting the hybrid systemPut the shift lever in “P” and apply the brakes. Hold the electronic key close to
the power switch (within 0.4 in. [10
mm]). Make sure that the button
side of the key is facing away from
the power switch.
An alarm will sound to indicate that
the start function cannot detect the
key with the depleted battery if any
of the doors will be opened and
closed while this operation.
Press the power switch within 5 seconds after the buzzer sounds,
keeping the brake pedal depressed.
If the hybrid system still cannot be started, contact your Lexus dealer.
STEP1
STEP2
■Replacing the key battery
As this procedure is the temporary measure, it is recommended that the electronic
key battery be replaced immediately. ( P. 4 0 1 )
STEP3

5
When trouble arises
483
5-2. Steps to take in an emergency
If the vehicle becomes stuck
CAUTION
■When attempting to free a stuck vehicle
If you choose to rock the vehicle back and forth to free it, make sure the surround-
ing area is clear, to avoid striking other vehicles, objects or persons. The vehicle
may also lunge forward or lunge back suddenly as it becomes free. Use extreme
caution.
■When shifting the shift lever
Be careful not to shift the shift lever with the accelerator pedal depressed.
This may lead to unexpected rapid acceleration of the vehicle that may cause an
accident and result in death or serious injury.
NOTICE
■To avoid damaging the transmission and other components
●Avoid spinning the wheels and racing the hybrid system.
●If the vehicle remains stuck after trying these procedures, the vehicle may require
towing to be freed.
Carry out the following procedures if the tires spin or the vehicle becomes
stuck in mud, dirt, or snow.
Stop the hybrid system. Set the parking brake and shift the shift
lever in “P”.
Remove the mud, snow, or sand from around the stuck tire.
Place wood, stones or some ot her material to help provide
traction under the tires.
Restart the hybrid system.
Turn off TRAC. (  P. 166)
Carefully apply the accelerator to free the vehicle.STEP1
STEP2
STEP3
STEP4
STEP5
STEP6