2007 Lexus GS350 engine

When trouble arises5
437
5-1. Essential information ........... 438If your vehicle needs to be 
towed.......................................... 438
If you think something is 
wrong .......................................... 445
Fuel pump shut off system ..... 446
Event data recorder ................. 447 5-2. Steps to take in an

emergency............................ 449
If a warning light turns on or a 
warning buzzer sounds............ 449
If a warning message is 
displayed.................................... 455
If you have a flat tire (Vehicles 
with run-flat tires) .................... 472
If you have a flat tire (Vehicles 
with standard tires) ................. 473
If the engine will not start ....... 483
If the shift lever cannot be 
shifted from P........................... 484
If you lose your keys ................. 485
If the electronic key does 
not operate properly ............ 486
If the vehicle battery is  discharged ............................... 488
If your vehicle overheats ........ 492
If the vehicle becomes  stuck ............................................ 495

438
5-1. Essential information
If your vehicle needs to be towed
Before towing
The following may indicate a problem with your transmission. Contact
your Lexus dealer before towing.
● The engine is running, but the v
ehicle will not move.
● The v
ehicle makes an abnormal sound.
Emergency towing
If a tow truck is not available, in an emergency your vehicle may be tem -
porarily towed using a cable or ch ain secur
ed to the emergency towing
eyelet. This should only attempted on hard, surfaced roads for short dis-
tances at low speeds. 
A driver must be in the vehicle to steer and oper
ate the brakes. The vehi-
cle’s wheels, drive train, axles, steering and br
akes must be in good condi -
tion.
If towing is necessary, we recommen d having your vehicle towed by your
Lexus dealer or a commercial towing service, using a lift-type truck or a flat
bed truck.

Use a safety chain system for all towing , a
nd abide by all state/provincial
and local laws.
The wheels and axle on the ground must be in good condition. 
If they are damaged, use a to wing dolly
or flat bed truck.

5
When trouble arises
439
5-1. Essential information
Towing eyelet
■Emergency towing procedureRelease the parking brake.
Put the shift lever in “N”.
The engine switch must be in the “ACC” mode (engine off) or the “IG-
ON” mode (engine on).
CAUTION
■Caution while towing
●Use extreme caution when towing the vehicle. 
Avoid sudden starts or erratic driving maneuvers which place excessive stress on
the emergency towing eyelet and the cable or chain.
●If the engine is not running, the power assi st for the brakes and steering will not
function, making steering and braking more difficult.
NOTICE
■To prevent causing serious damage to the transmission
Never tow this vehicle from the front with the rear wheels on the ground. 
This may cause serious dama ge to the transmission.
STEP1
STEP2
STEP3

5
When trouble arises
443
5-1. Essential information
From rear (2WD models)Switch to “ACC” mode so that the
steering wheel is unlock
ed.
From rear (4WD models)
Use a towing dolly under the front
wheel.
NOTICE
■To prevent damaging the vehicle
●Do not tow the vehicle with the engine switch “OFF”. 
The steering lock mechanism is not st rong enough to hold the front wheel
straight.
●When raising the vehicle, ensure adequate ground clearance for towing at the
opposite end of the raised vehicle. Wi thout adequate clearance, the vehicle
could be damaged while being towed.

5
When trouble arises
445
5-1. Essential information
If you think something is wrong
If you notice any of the following symptoms, your vehicle probably needs
adjustment or repair. Contact your Lexus dealer as soon as possible.
■ Visible symptoms
●Fluid leaks under the v
ehicle
(Water dripping from the air conditioning after use is normal.)
● Flat
-looking tires or uneven tire wear
●Engine coolant temper atur
e gauge needle continually points
higher than normal
■ A
udible symptoms
●Changes in e
xhaust sound
● Ex
cessive tire squeal when cornering
●Str
ange noises related to the suspension system
●P
inging or other noises related to the engine
■ Oper
ational symptoms
●Engine mis
sing, stumbling or running rough
●A
ppreciable loss of power
●V
ehicle pulls heavily to one side when braking
●V
ehicle pulls heavily to one side when driving on a level road
● L
oss of brake effectiveness, sp ongy feeling, pedal almost touches
the floor

446
5-1. Essential information
Fuel pump shut off system
■Follow the procedure below to restart the engine after the system is activated.Switch to “ACC” mode or “OFF”.
Restart the engine.
NOTICE
■Before starting the engine
Inspect the ground under the vehicle. 
If you find that fuel has leaked on to th e ground, the fuel system has been damaged
and is in need of repair. Do not restart the engine.
To minimize the risk of fuel leakage when the engine stalls or an airbag
inflates upon collision, the fuel pump shut off system stops supplying fuel to
the engine.
STEP1
STEP2

5
When trouble arises
447
5-1. Essential information
Event data recorder
In a crash or a near car crash event
The EDR may record some or all of the following information.
●Engine speed
● Whether the br
ake pedal was applied or not
● V
ehicle speed
●T
o what extent the accelerator pedal was depressed
●P
osition of the transmission shift lever
●Whether the driv
er and front passenger wore seat belts or not
● D
river's seat position
●SRS airbag deplo
yment data
● SRS airbag s
ystem diagnostic data
Your Lexus’ Electronic Control U nit (ECU) may contain another EDR.
Ther
e are a variety of driving situation s which include activating the vehi -
cle stability control (VSC) under whic h the V
SC EDR will record certain
information. The VSC EDR may record so me or all of the following infor-
mation:
● Behavior of the v
ehicle
● Steering wheel angle
●Vehicle speed
Your vehicle has computers that monitor and control certain aspects of
your vehicle. These computers assist in driving and maintaining optimal
vehicle performance.
Besides storing data useful for troublesh ooting, there is a system to record
data in a crash or a near car crash event. This is called an Event Data
Recorder (EDR).

450
5-2. Steps to take in an emergency
Stop the vehicle immediately.
The following warning indicates 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 lampMalfunction in:
• The electronic engine control system;
• The electronic throttle control system; or
• The transmission control system.
SRS warning lightMalfunction in:
• The SRS airbag system;
• Front passenger occupant classification system; or
• The seat belt pretensioner system.