2006 Lexus GS430 Scheduled Maintenance Guide / LEXUS 2006 GS430/GS300 FROM JAN. 2006 PROD. OWNER'S MANUAL (OM30786U)

GAUGES, METERS AND SERVICE REMINDER INDICATORS
89
Low Engine Oil Level Warning
G13022
When the engine oil level is too low, the master warning
light comes on, a warning tone sounds, and the above
message appears.
Add oil as soon as possible. (For instructions, see “Checking
the engine oil level” on page 530.)
While driving on steep inclines or rough roads which causes
the vehicle to substantially sway or on curves, this message
may appear due to the movement of engine oil in the engine.
In normal conditions, due to engine oil consumption, this
message may a ppear earlier than the specified service interval
of the scheduled maintenance. This is because the engine oil
is consumed to the low level within the scheduled maintenance
interval and does not indicate a problem. (For detailed
information, see “Facts about engine oil consumption” on page
528.)
NOTICE
Continued engine operation with low engine oil will
damage the engine.
 Engine Oil Maintenance Reset Warning (U.S.A.
only)
G13033
This message indicates that the engine oil maintenance
data has been reset. After replacing the engine oil, be sure
to reset the maintenance data.
To reset the data, perform the following operations:
1. Push the “ODO TRIP” switch in the switch box to
change the display to blank.
2. Turn the engine switch off.
3. Turn the engine switch on with the trip meter “RESET”
switch held down.
4. Keep pushing the “RESET” switch for longer than 7
seconds after the engine switch is turned on.
After the above operation, the master warning light comes
on, a warning tone sounds and the above message
appears to inform you that the engine oil maintenance
data has been reset.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
90
Engine Oil Replacement Reminder (U.S.A. only)
G13035
If the driving range exceeds 4,500 miles after the engine
oil maintenance data is reset, the master warning light
comes on, a warning tone sounds and the above message
appears for about 15 seconds when you select the engine
switch in “IGON” mode.
This message indicates that the engine oil should be replaced
soon. If the message appears, it is recommended to inspect
the engine oil with the engine switch off. For details about
inspection, see “Checking the engine oil level” on page 530.
If the engine oil level is low, engine oil should be replaced.
Have it replaced at your Lexus dealer.
After the engine oil replacement, reset the engine oil
maintenance data and make sure the “OIL MAINT RESET”
appears on the display.
NOTICE
The warning message on the display is based on the
driving range after the engine oil maintenance data
reset. This is not based on the monitoring of dirty
condition of the engine oil.
 Engine Oil Replacement Warning (U.S.A. only)
G13034
If the driving range exceeds 5,000 miles after the engine
oil maintenance data is reset, the master warning light
comes on, a warning tone sounds and the above message
appears.
This message indicates that the engine oil should be replaced
as soon as possible. If the message appears, it is
recommended to inspect the engine oil with the engine switch
off. For details about inspection, see “Checking the engine oil
level” on page 530.
If the engine oil level is low, engine oil should be replaced.
Have it replaced at your Lexus dealer.
After the engine oil replacement, reset the engine oil
maintenance data and make sure the “OIL MAINT RESET”
appears on the display.
NOTICE
The warning message on the display is based on the
driving range after the engine oil maintenance data
reset. This is not based on the monitoring of dirty
condition of the engine oil.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
91
Electronic Brake System Failure Warning
G13100

G13028
GS430 GS300
If the above message appears and the brake system
warning light (yellow) comes on, the following systems do
not operate. (GS430 only—In some cases, the
multiinformation display shows either “CHECK VSC” or
“CHECK ECB*” only.)
 Traction control system
 Vehicle stability control system
 Hill− start assist control system
If the above message appears and the brake system
warning light (yellow) and “ABS” warning light come on,
the following systems do not operate. (GS430 only—In
some cases, the multiinformation display shows either
“CHECK VSC” or “CHECK ECB*” only.)
 Anti− lock brake system
 Brake assist system
Although it is no problem to continue driving, have your vehicle
checked by your Lexus dealer as soon as possible.
*: Electronically Controlled Brake System
 Variable Gear Ratio Steering System Warning
(GS430 only)
G13027
If there is a problem in the variable gear ratio steering
system, the master warning light comes on and the above
message appears.
If this message appears, the system does not work. Although
it is no problem to continue driving, have your vehicle checked
by your Lexus dealer as soon as possible.
 FourWheel Drive System Warning (Fourwheel
drive models only)
G13021
If there is a problem in the fourwheel drive system, the
master warning light comes on, a warning tone sounds
and the above message appears.
If the above warning message appears, have your vehicle
checked by your Lexus dealer as soon as possible.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
92
Tire Pressure Warning
G13025
When the low tire inflation pressure is detected while
driving, the tire pressure warning light and master
warning light come on, and the above message appears.
Adjusting the tire inflation pressure will turn off the warning
message. If the message remains on, have your vehicle
checked by your Lexus dealer.
G13024
This message indicates the tire pressure warning system is
initialized. After replacing the tires or wheels, adjust all 4 tires
to specified tire inflation pressure and initialize the tire pressure
warning system. To initialize the system, start the engine and
push the tire pressure warning reset switch for longer than 3
seconds with the vehicle stopped. The above message
appears.
G13026
If there is a problem in the tire pressure warning system,
the tire pressure warning light blinks and master warning
light comes on, and the above message appears.
The tire pressure warning light system is not working properly.
In this case, it is probable that a tire pressure warning valve and
transmitter is malfunctioning or the system is experiencing
signal interference. In the case of signal interference, the
warning message will turn off when the interference ends. If
the tire pressure warning light blinks and master warning light
comes on, and the above message appears frequently, have
your vehicle checked by your Lexus dealer.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
93
Electronic Key System Warning
G13014
In the following cases, the master warning light flashes, a
warning tone sounds and the above message appears.
 An electronic key is not detected in the vehicle when you
push the engine switch. In this case, the above message
appears for 8 seconds.
 An electronic key is not detected in the vehicle because
someone has taken an electronic key outside of the vehicle
without turning the engine switch off. At this time, the
electronic key sounds an alarm. The above message turns
off if you turn the engine switch off or the entry function
detects an electronic key in the vehicle.
In addition to either of the above conditions, if you get out from
the vehicle, having an electronic key when the engine switch
is selected in “IG −ON” mode and the selector lever is in a
position other than “P”, “SHIFT TO P RANGE” and “KEY IS
NOT DETECTED” appear alternately.
G13015
If you get out from the vehicle, having an electronic key
when the engine switch is selected in “IGON” mode and
the selector lever is in a position other than “P”, the
master warning light flashes, a beep sounds inside the
vehicle and the above message appears. When you shift
the selector lever to the “P” position or start driving, the
beeping stops sounding, the above message turns off.
In addition to the above condition, if the entry function does not
detect an electronic key in the vehicle, “SHIFT TO P RANGE”
and “KEY IS NOT DETECTED” appear alternately.
G13016
If the entry function determines that the battery voltage is
low (2V to 3V) when the engine switch is turned off more
than 20 minutes after turned on, the master warning light
flashes, a warning tone sounds and the above message
appears.
If the above message appears, the battery needs to be
replaced. Although you can replace the battery referring to
“Replacing the battery ” on page 34 , we recommend you have
it replaced by your Lexus dealer as it is easy to be scratched.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
94
G13017
If the steering lock is malfunctioning, the master warning
light comes on, the engine switch indicator light blinks
amber and the above message appears.
The engine will not start in this case. Contact your Lexus
dealer as soon as possible.
G13018
If the steering lock is not unlocked due to the load applied
to the steering wheel when pushing the engine switch, the
master warning light comes on, the engine switch
indicator light blinks green and the above message
appears.
The engine will not start in this case. To start the engine, push
the engine switch again while turning the steering wheel in
either direction.
Intuitive Parking Assist Warning
G13077
If icicles, snowflakes or mud gets on the ultrasonic
sensors of the intuitive parking assist when it is on, the
above message appears and the vehicle symbol and
indicator bars continue flashing until the suspected
sensor is cleaned.
Remove the foreign matter or deice the sensor, the intuitive
parking assist returns to normal.
G13076
If the ultrasonic sensor of the intuitive parking assist is
malfunctioning or a sensor cable is broken when it is on,
the malfunctioning sensor flashes, 2 beeps sound 5 times
and the above message appears.
The flashing sensor is disabled, but other sensors work
properly. Have your vehicle checked by your Lexus dealer as
soon as possible.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
95
Radar Cruise Control Warning
G13073
If the system cannot easily measure the
vehicletovehicle distance because of a dirty millimeter
wave radar sensor or grille cover while the dynamic radar
cruise control is on, the master warning light comes on
and the “CRUISE” indicator light flashes. At this time a
warning tone sounds and the above message appears.
If this message appears, clean the sensor and grille cover with
a soft cloth and try setting the preset speed again. If the dirt
is removed without cleaning, the system will automatically
enter the “RADAR READY” mode. If the system does not enter
the “RADAR READY” mode even after cleaning or the
message remains on the display, the system might be
malfunctioning. Although it is no problem to continue driving,
contact your Lexus dealer.
G13074
If the system cannot easily measure the
vehicletovehicle distance because of the following
conditions while the dynamic radar cruise control is on,
the master warning light comes on, the “CRUISE”
indicator light flashes. At this time a warning tone sounds
and the above message appears.
 The driving pattern selector switch is set to the snow
position mode.
 It is determined that it is difficult to make a measurement
because of bad weather (such as extremely hot weather)
 The wipers are operated at high speed with the wiper lever
in the “AUTO” position
In the following cases, the dynamic radar cruise control
switches to the “RADAR READY” mode:
 The driving pattern selector switch is changed to the normal
or power position.
 The wipers are stopped or are switched to low speed or
intermittent operation. (Including intermittent and stopped
wipers in the “AUTO” position)

GAUGES, METERS AND SERVICE REMINDER INDICATORS
96In the above conditions, press the control lever upward in the
“+ RES” direction and release it. The dynamic radar cruise
control will be restored, however, even after the weather
clears, if the setting operation cannot be performed or if the
warning message still appears, the system might have
malfunctioned. Although it is no problem to continue driving,
contact your Lexus dealer.
G13075
If the system malfunction is detected when dynamic radar
cruise control is in the “RADAR READY” mode or
operating, the master warning light comes on and the
“CRUISE” indicator light flashes. At this time a warning
tone sounds and the above message appears.
If this message appears, stop your vehicle in
a safe place, turn
the engine switch off, and then restart it to reset the system.
If the setting still cannot be made or the same message
appears again, the system might have malfunctioned.
Although it is no problem to continue driving, contact your
Lexus dealer.
NOTICE
While you are cruising with the dynamic radar cruise
control on, if the master warning light comes on, the
“CRUISE” indicator light flashes, “CHECK CRUISE
SYSTEM” appears on the multiinformation display and
the warning tone sounds, turn the engine switch off and
then on again. If the function is cancelled again after
setting or if settings cannot be made, the dynamic radar
cruise control system may be malfunctioning.
Although it is no problem to continue driving, have your
vehicle checked by your Lexus dealer.