check engine Lexus GS250 2012 Service Manual

7557-2. Steps to take in an emergency
7
When trouble arises
GS350/250_EE (OM30C36E)
When a tire is replaced with a spare tire
Vehicles with a compact spare tire: The compact spare tire is not equipped
with a tire pressure warning valve and transmitter. If a tire goes flat, the tire
pressure warning light will not turn off even though the flat tire has been
replaced with the spare tire.
Vehicles with a full-size spare tire: The spare tire is also equipped with a tire
pressure warning valve and transmitter. The tire pressure warning light will
turn on if the tire inflation pressure of the spare tire is low. If a tire goes flat,
the tire pressure warning light will not turn off even though the flat tire has
been replaced with the spare tire.
Conditions that the tire pressure warning system may not function properly
P. 6 7 8
If the tire pressure warning light frequently comes on after blinking for 1 min-
ute
If the tire pressure warning light frequently comes on after blinking for 1
minute when the engine switch is turned to IGNITION ON mode, have it
checked by any authorized Lexus dealer or repairer, or another duly qualified
and equipped professional.
Warning buzzer
In some cases, the buzzer may not be heard because of noisy place or an
audio sound.

7667-2. Steps to take in an emergency
GS350/250_EE (OM30C36E)
Indicates that engine
oil level is lowCheck the level of
engine oil, and add if
necessary.
(If equipped)
Indicates that Lexus
parking assist-sensor is
dirty or covered with
ice
Clean the sensor.
(If equipped)
Indicates that the radar
sensor is dirty or cov-
ered with ice
Clean the sensor.
(If equipped)
Indicates that the radar
cruise control system is
unable to judge vehi-
cle-to-vehicle distance
• Turn off the snow
mode.
• If the windshield
wipers are on, turn
them off or set them
to a mode other than
AUTO or high speed
wiper operation.
Wa r n i n g m e s s a g eDetailsCorrection procedure

7727-2. Steps to take in an emergency
GS350/250_EE (OM30C36E)
Wa r n i n g m e s s a g eDetailsCorrection procedure
(If equipped)
Indicates that the tire
inflation pressure is
lowCheck the tire inflation
pressure, and adjust to
the appropriate level.
(If equipped)
Indicates a malfunc-
tion in the tire pressure
warning system
Stop the vehicle in a
safe place and turn the
engine switch off then
on again.
If the tire pressure
warning indicator
flashes for 1 minute
then illuminates,
there is a malfunction
in the system. Have
the vehicle inspected
by any authorized
Lexus dealer or
repairer, or another
duly qualified and
equipped profes-
sional.

7737-2. Steps to take in an emergency
7
When trouble arises
GS350/250_EE (OM30C36E)
Wa r n i n g m e s s a g eDetailsCorrection procedure
(If equipped)
Indicates that the tire
position information
cannot be recognized
Drive for a short while
and check if the display
updates.
If the radio wave
conditions improve,
the display may
return to normal. If
the tire pressure is
still not displayed
after driving for sev-
eral minutes, stop the
vehicle in a safe
place, turn the engine
switch off then on
again, and start driv-
ing.
If the tire pressure is
still not displayed
even after repeating
this several times,
have the vehicle
inspected by any
authorized Lexus
dealer or repairer, or
another duly quali-
fied and equipped
professional.

7747-2. Steps to take in an emergency
GS350/250_EE (OM30C36E)After taking the specified steps to correct the suspected problem,
check that the warning message and light go off.
Wa r n i n g m e s s a g eDetailsCorrection procedure
(If equipped)
Indicates that the pre-
crash safety system is
not currently functional
because the grille cover
or the sensor is dirty
This message also
appears when the
pre-crash safety sys-
tem is not functional
due to overheating.Check the grille cover
and the sensor and
clean them if they are
dirty.
In case of overheat-
ing, the system will
become functional
once the system
cools down.
Have the malfunction repaired immediately.
(Flashes)
Inte-
rior
buzzerExterior
buzzerWarning messageDetailsCorrection
procedure
Once
The electronic
key is not
detected when an
attempt is made to
start the engine.Start the
engine
with the
electronic
key pres-
ent.
(Flashes)

8077-2. Steps to take in an emergency
7
When trouble arises
GS350/250_EE (OM30C36E)Connect the hose to the valve.
Screw the end of the hose clock-
wise as far as possible.
Check the specified tire infla-
tion pressure.
Tire inflation pressure is specified
on the label as shown. (P. 850)
Start the engine. (P. 207)
To inject the sealant and
inflate the tire, turn the com-
pressor switch on.
Use the kit with the top facing
upward.
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8
9
10

8197-2. Steps to take in an emergency
7
When trouble arises
GS350/250_EE (OM30C36E)
If the parking brake cannot be released
Shift the shift lever to P.
Turn the engine switch off.
Check that the parking brake indicator is off.
Chock the tires.
In the event that the battery is discharged or switch operation does
not release the parking brake, the parking brake can be released
manually using the procedure below. This procedure should be
performed only if necessary, such as in an emergency.
If the switch cannot be operated even when the battery is normal,
the parking brake system may be malfunctioning. Have the vehicle
inspected by any authorized Lexus dealer or repairer, or another
duly qualified and equipped professional immediately.
Before releasing the parking brake manually

821
7 7-2. Steps to take in an emergency
When trouble arises
GS350/250_EE (OM30C36E)
Manual operation of the parking brake
The parking brake cannot be set manually.
CAUTION
When releasing the parking brake manually
Shift the shift lever to P, turn the engine switch off and chock the tires.
Failure to do so may cause the vehicle to move, resulting in an accident.
Turn the engine switch off and check that the parking brake indicator is
off. Failure to do so may cause the system to operate and turn the inserted
parking brake release tool, resulting in an injury.

8237-2. Steps to take in an emergency
7
When trouble arises
GS350/250_EE (OM30C36E)
Trunk
Turn the mechanical key
clockwise to open.
Ensure that the shift lever is in P and depress the brake pedal.
Touch the Lexus emblem side
of the electronic key to the
engine switch.
The engine switch will turn to
IGNITION ON mode.
When the smart entry & start sys-
tem is deactivated in customization
setting, the engine switch will turn
to ACCESSORY mode.
Firmly depress the brake pedal and check that is shown on
the multi-information display.
Press the engine switch.
In the event that the engine still cannot be started, contact any
authorized Lexus dealer or repairer, or another duly qualified and
equipped professional.
Starting the engine
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8247-2. Steps to take in an emergency
GS350/250_EE (OM30C36E)
Stopping the engine
Shift the shift lever to P and press the engine switch as you normally do when
stopping the engine.
Replacing the key battery
As the above procedure is a temporary measure, it is recommended that the
electronic key battery be replaced immediately when the battery is depleted.
(P. 697)
Alarm (if equipped)
Using the mechanical key to lock the doors will not set the alarm system.
If a door is unlocked using the mechanical key when the alarm system is set,
the alarm may be triggered.
Changing engine switch modes
Release the brake pedal and press the engine switch in step above.
The engine does not start and modes will be changed each time the switch is
pressed.(P. 208)
When the electronic key does not work properly
Make sure that the smart entry & start system has not been deactivated in
the customization setting. If it is off, turn the function on.
(Customizable features P. 855)
Check if battery-saving mode is set. If it is set, cancel the function. (P.
129)
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