check engine light Lexus GS430 2006 Scheduled Maintenance Guide / LEXUS 2006 GS430/GS300 FROM JAN. 2006 PROD. (OM30786U) User Guide

GAUGES, METERS AND SERVICE REMINDER INDICATORS
88
Rear Lights System Failure Warning
G13011
If there is a problem in the rear lights system (tail lights,
license plate light, stop lights, rear side marker light, high
mounted stoplight), 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.
 Low Washer Fluid Warning
G13020
When the fluid level in the tank becomes very low, the
master warning light flashes, a warning tone sounds and
the above message appears.
Fill the tank as soon as possible.
 Low Engine Oil Pressure Warning
G13012
When the engine oil pressure becomes too low, the
master warning light flashes, a warning tone sounds and
the above message appears.
If this message appears while you are driving, pull off the road
to a safe place and stop the engine immediately. Call a Lexus
dealer or qualified repair shop for assistance.
The message may appear when the oil level is extremely low.
It is not designed to indicate low oil level, and the oil level must
be checked using the oil level dipstick.
NOTICE
Do not drive the vehicle while this warning message is
displayed even for one block. It may ruin the engine.

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
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
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
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.

STARTING AND DRIVING
349
Engine switch
G31031a
By pushing the engine switch with an electronic key in
possession, you can select “ACC”, “IGON” or “OFF”
mode and start or stop the engine. (For details, see
“Selecting the mode” on page 350 and “Starting the engine” on
page 356 and “Stopping the engine” on page 357.)
When an electronic key is in the vehicle, it is automatically
detected and checked if it corresponds to the registered ID
code for the vehicle, thereby allowing engine operation and
mode selection.
Press the engine switch slowly and firmly. Quick operation
may not activate the desired mode. In the following conditions, the system malfunctions. Contact
your Lexus dealer.

If the engine switch is not illuminated when the clearance
lights are turned on.
 If the engine switch indicator light flashes amber.
 If the switch movement seems unusual.
If, in an emergency, you must turn the engine off while the
vehicle is moving, press the engine switch for more than 3
seconds. At this time, “ACC” mode is selected.
CAUTION
 Do not press the engine switch during driving, except
in an emergency situation.
 If you leave your vehicle in hot weather, the switch
surface may get hot. Take care not to get burned.

STARTING AND DRIVING
353
Steering lock
The steering wheel is locked when the engine switch is
turned to “OFF” from “ACC” or “IGON” mode and any
door is opened.
When the steering lock is activated, you may hear a sound
coming from the steering column, it is not a malfunction. If you
select the “OFF” mode while any door is open, the steering
wheel is not locked until it is closed.
If you select the mode other than “OFF” or start the engine, the
steering lock is disabled.
If there is trouble somewhere in the steering lock system, either
of the following warning messages will appear on the
multi−information display.
 S/T IS NOT UNLOCKED
 CHECK S/T LOCK
G31045
When pushing the engine switch while the brake pedal is
depressed, the steering lock is not unlocked if load is
applied to the steering wheel, and the above message
appears.
The engine will not start. At this time, the master warning light
comes on and the engine switch indicator light blinks green.

STARTING AND DRIVING
355
How to start the engine
Before starting the engine, be sure to follow the instructions.
CRANKING HOLD FUNCTION
Once you push the engine switch while the brake pedal is
depressed, the cranking hold function continues to crank the
engine in “IG−ON” mode until it starts.
The function stops cranking the engine after about 25 seconds
at maximum if the engine has not started yet. When you crank
the engine again, wait a few seconds and restart it.
BEFORE STARTING THE ENGINE
1. Check the area around the vehicle before entering it.
2. Adjust seat position, seatback angle, seat cushion angle,
seat cushion height, head restraint height and steering wheel
angle.
3. Adjust the inside and outside rear view mirrors.
4. Lock all doors.
5. Fasten seat belts.
Remember to check that the service reminder indicators
function when the engine switch is selected in “IG− ON” mode,
and check the fuel gauge to see that you have sufficient fuel. BEFORE CRANKING
1. Apply the parking brake firmly.
2. Turn off unnecessary lights and accessories.
3. Put the selector lever in ”P”. If you need to restart the engine
while the vehicle is moving, put the selector lever in ”N”. A
starter safety device will prevent the starter from operating if
the selector lever is in any drive position.
4. Depress
the brake pedal and hold it to the floor until driving
off.
The multiport fuel injection system/sequential multiport fuel
injection system in your engine automatically controls the
proper air −fuel mixture for starting. You can start a cold or hot
engine as follows:

STARTING AND DRIVING
356
Starting the engine
Normal starting procedure
G31035
When depressing the brake pedal while carrying an
electronic key, make sure the green engine switch
indicator light comes on. And then push the engine
switch to start the engine.
If you press the engine switch while the brake pedal is
depressed and the transmission is in “P” or “N”, the engine will
start even if initially in “OFF”, “ACC” or “IG −ON” mode.
If you start the engine in “OFF” mode, the engine immobilizer
is disabled, and the security indicator light goes off.
If you push the engine switch while the brake pedal is
depressed with the transmission not in “P” or “N”, “IG −ON”
mode will be selected with the engine not running. If the engine stalls ...
Simply restart it , using the correct procedure given in normal
starting.
If the engine will not start
See ”If your vehicle will not start” on page 468.
NOTICE

Do not race a cold engine.
 If the engine becomes difficult to start or stalls
frequently, have the engine checked immediately.