warning light Lexus IS250 2006 Using the audio system / LEXUS 2006 IS350/250 THROUGH APRIL 2006 PROD. (OM53508U) User Guide

254
4-2. Maintenance
Emission inspection and maintenance (I/M) programs
Some states have vehicle emission inspection programs which include
OBD (On Board Diagnostics) checks. The OBD system monitors the oper-
ation of the emission control system.
■ If the electronic engine control system warning light comes on
The OBD system determines that a problem exists somewhere in
the emission control system. Your vehicle may not pass the I/M test
and may need to be repaired. Contact your Lexus dealer to service
the vehicle.
■ Your vehicle may not pass the I/M test:
●When the battery is disconnected or discharged
Readiness codes that are set during ordinary driving are erased.
Also, depending on your driving habits, the readiness codes may
not be completely set.
● When the fuel tank cap is loose
The electronic engine control sy stem warning light comes on as a
temporary malfunction and your vehicle may not pass the I/M
test.
■ When the electronic engine contro l system warning light goes off
after several driving trips
The error code in the OBD system will not be cleared unless the
vehicle is driven 40 or more times.
■ If your vehicle does not pass the I/M test
Contact your Lexus dealer to prep are the vehicle for re-testing.

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4-3. Do-it-yourself maintenance
4
Maintenance and care
■When the initialization of the tire inflation pressure warning system has failed
Initialization can be completed in a few minutes. However, in the following cases,
the settings have not been recorded and the system will not operate properly. If
repeated attempts to record tire inflation pressure settings are unsuccessful, have
the vehicle inspected by your Lexus dealer.
●When operating the satellite switch, the warning light does not flash and the set-
ting message does not appear on the multi-information display. (The tires can-
not be initialized while the vehicle is running.)
●After driving for approximately 20 mi nutes since the initialization has been
completed, the warning light flashes.
■Routine tire inflation pressure checks
The tire inflation pressure warning system does not replace routine tire inflation
pressure checks. Make sure to check tire inflation pressure as part of your routine
of daily vehicle checks.

304
4-3. Do-it-yourself maintenance
■Driver’s side instrument panel
FuseAmpereCircuit
1FR P/SEAT LH30APo w e r s e a t
2A/C7. 5 AAir conditioning system
3MIR HTR15AOutside rear view mirror defoggers
4TV NO.110ADisplay
5FUEL OPEN10AFuel filler door opener
6TV NO.27. 5 A
7PSB30APre-collision seat belt
8S/ROOF25AElectric moon roof
9TA I L10ATail lights, license plate lights, parking
lights
10PA N E L7. 5 ASwitch illumination, air conditioning
system, display
11RR FOG7. 5 A
12ECU-IG LH10A
Cruise control, air conditioning sys-
tem, power steering, rain sensor, anti-
glare inside rear view mirror, shift lock
system, moon roof, tire inflation pres-
sure warning system
13FR S/HTR LH15ASeat heaters and ventilators

When trouble arises5
317
5-1. Essential information ............. 318If your vehicle needs to be towed............................................ 318
If you think something is wrong .......................................... 325
Fuel pump shut off system ..... 326
Event data recorder ................. 327
5-2. Steps to take in an emergency ............................ 329
If a warning light turns on or a warning buzzer
sounds... ...................................... 329
If a warning message is displayed .................................... 334
If you have a flat tire ................. 348
If the engine will not start ....... 356
If the shift lever cannot be shifted from P..................... 357
If you lose your keys ................ 358
When the electronic key battery is discharged ............ 359
If the vehicle battery is discharged ................................ 362 If your vehicle overheats ........ 365
If the vehicle becomes
stuck ............................................ 367

5
When trouble arises
329
5-2. Steps to take in an emergency
If a warning light turns on or a warning buzzer sounds...
Stop the vehicle immediately. Continuing to drive the vehicle may be dangerous.
The following warning indicates a possible problem in the brake system.
Immediately stop the vehi cle in a safe place and contact your Lexus
dealer.
*: Parking brake engaged warning buzzer:
 P. 3 3 9
Warning lightWarning light/Details
(U.S.A.)

(Canada)
Brake system warning light (warning buzzer)*
•Low brake fluid
• Malfunction in the brake booster system
This light also comes on when the parking brake is not
released. If the light turns off after the parking brake is fully
released the system is operating normally.
Calmly perform the following actions if any of the warning lights turn on or
flash. If a light turns on or flashes, bu t then turns off, this does not necessar-
ily indicate a malfunction in the system.

330
5-2. Steps to take in an emergency
Stop the vehicle immediately.The following warnings indicate the possibility of damage to the vehicle
that may lead to an ac cident. Immediately stop the vehicle in a safe place
and contact your Lexus dealer.
Have the vehicle inspected by y our 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.
Warning lightWarning light/Details
Charging system warning light
Indicates a malfunction in the vehicle’s charging system.
Warning lightWarning light/Details
(U.S.A.)

(Canada)
Malfunction indicator lampIndicates a malfunction in:
• The electronic engine control system;
• The electronic throttle control system; or
• The electronic automatic transmission control system.
SRS warning lightIndicates a malfunction in:
• The SRS airbag system; or
• The seat belt pretensioner system.

5
When trouble arises
331
5-2. Steps to take in an emergency
Have the malfunction repaired immediately.After taking the specified steps to co rrect the suspected problem, check
that the warning light turns off.
Warning lightWarning light/Details
(U.S.A.)

(Canada)
ABS warning light
Indicates a malfunction in:
•The ABS; or
• The brake assist system.
Electric power steering system warning light
• Indicates a malfunction in the EPS (Electric Power Steering) system.
Pre-collision system warning light (if equipped)
• Indicates a malfunction in the pre-collision system.
Warning lightWarning light/DetailsCorrection procedure
Open door warning light
(warning buzzer)
*1
Indicates that a door or a
trunk is not fully closed.
Check that all doors and the
trunk are closed.
Low fuel level warning lightRemaining fuel
(Approximately 2.9 gal. [11 L,
2.4 Imp.gal.] or less)
Refuel the vehicle.
Driver’s seat belt reminder
light (warning buzzer)
*2
Warns the driver to fasten
his/her seat belt.Fasten the seat belt.

332
5-2. Steps to take in an emergency
*1:Open door warning buzzer:
P. 3 3 9
*2:Driver's and front passenger’s seat belt reminders:
The driver’s and front passenger’s seat belts reminder sounds to alert the driver
and front passenger that his or her sear belt is not fastened. The buzzer sounds
intermittently for 10 seconds after the vehicle has reached a speed of at least 12
mph (20 km/h). Then, if the seat belt is still unfastened, the buzzer will sound in a
different tone for 20 more seconds.
Warning lightWarning light/DetailsCorrection procedure
Front passenger’s seat belt
reminder light
(warning buzzer)
*2
Warns the front passenger to
fasten his/her seat belt.
Fasten the seat belt.
Low tire pressure warning
light
Indicates low tire pressure.Adjust the tire pressure.
A malfunction in the tire pres-
sure warning system. P. 335
Master warning light
A buzzer sounds and the
warning light comes on and
flashes to indicate that the
master warning system has
detected a malfunction.
 P. 3 3 4

5
When trouble arises
333
5-2. Steps to take in an emergency
■If the electronic engine control system warning light comes on while driving
First check the following:
●Is your vehicle low on gas?
If it is, refuel the vehicle immediately.
●Is the fuel tank cap loose?
If it is, tighten it securely.
The light will go off after taking several driving trips.
If the light does not go off even after several trips, contact your Lexus dealer as soon
as possible.
■Front passenger detection sensor and passenger seat belt reminder
●If luggage is placed on the front passenger seat, the front passenger detection
sensor may cause the warning light to flash, even if a passenger is not sitting in
the seat.
●If a cushion is placed on the seat, the sensor may not detect a passenger, and the
warning light may not operate properly.

334
5-2. Steps to take in an emergency
If a warning message is displayed
Stop the vehicle immediately.A buzzer sounds and a warning message is shown on the multi-informa-
tion display. The following warnings indicate the possibility of damage to
the vehicle that may lead to an acci dent. Immediately stop the vehicle in a
safe place and contact your Lexus dealer.
Wa r n i n g m e s s a g eDetails
(Flashing)
Indicates an abnormal engine oil pressure.
The warning light may turn on if the engine oil pres-
sure is too low.
If a warning is shown on the multi-information display, stay calm and per-
form the following actions:
Master warning light
The master warning light also
comes on or flashes in order to
indicate that a message is cur-
rently being displayed on the
multi-information display.
Multi-information display
If any of the warning li ght turns on again after performing the following
actions, contact your Lexus dealer.