2010 Lexus GS350 engine

When trouble arises5
519
GS_G_U (OM30C80U)
June 29, 2011 10:30 am
5-1. Essential information
Emergency flashers.............. 520
If your vehicle needs 
to be towed ............................. 521
If you think something is 
wrong ..................................... 530
Fuel pump shut off 
system ...................................... 531
Event data recorder .............. 5325-2. Steps to take in an 
emergency
If a warning light turns 
on or a warning buzzer 
sounds..................................... 534
If a warning message is 
displayed................................ 543
If you have a flat tire (Vehicles 
with standard tires) ............. 556
If you have a flat tire (Vehicles 
with run-flat tires)................ 566
If the engine will not start .... 568
If the shift lever cannot be 
shifted from “P”.................... 569
If you lose your keys .............. 570
If the electronic key does 
not operate properly............ 571
If the 12 volt battery is 
discharged ............................. 574
If your vehicle overheats ..... 578
If the vehicle becomes 
stuck......................................... 581
If your vehicle has to be stopped 
in an emergency .................. 583

520
GS_G_U (OM30C80U)
June 29, 2011 10:30 am
5-1. Essential information
Emergency flashers
NOTICE
■To prevent 12 volt battery discharge
Do not leave the emergency flashers on longer than necessary when the engine is
not running.
Use the emergency flashers if the vehicle malfunctions or is involved in an
accident.
Press the switch to flash all the
turn signal lights. To turn them
off, press the switch once again.

5
When trouble arises
521
5-1. Essential information
GS_G_U (OM30C80U)
June 29, 2011 10:30 am
If your vehicle needs to be towed
Before towing
The following may indicate a problem with your automatic transmission.
Contact your Lexus dealer before towing.
●The engine is running, but the vehicle will not move.
●The vehicle makes an abnormal sound.
If towing is necessary, we recommend 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, and abide by all state/provincial
and local laws.
If towing from the rear, the wheels and axle on the ground must be in good
condition.
If they are damaged, use a towing dolly or flat bed truck.

522
5-1. Essential information
GS_G_U (OM30C80U)
June 29, 2011 10:30 am
Emergency towing
If a tow truck is not available, in an emergency your vehicle may be tem-
porarily towed using a cable or chain secured to the emergency towing
eyelet. This should only be attempted on hard, surfaced roads for short
distances at low speeds.
A driver must be in the vehicle to steer and operate the brakes. The vehi-
cle’s wheels, drive train, axles, steering and brakes must be in good condi-
tion.
Towing eyelet
■Emergency towing procedure
Release the parking brake.
Put the shift lever in “N”.
The “ENGINE START STOP” switch must be in the ACCESSORY mode
(engine off) or the IGNITION ON mode (engine on).
STEP1
STEP2
STEP3

5
When trouble arises
523
5-1. Essential information
GS_G_U (OM30C80U)
June 29, 2011 10:30 am
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. Always use caution for the
surroundings and other vehicles while towing.
●If the engine is not running, the power assist for the brakes and steering will not
function, making steering and braking more difficult.
NOTICE
■To prevent causing serious damage to the automatic transmission
Never tow this vehicle from the front with the rear wheels (2WD models) or four
wheels (4WD models) on the ground.
This may cause serious damage to the automatic transmission.

5
When trouble arises
527
5-1. Essential information
GS_G_U (OM30C80U)
June 29, 2011 10:30 am
Towing with a wheel lift-type truck
From front
Use a towing dolly under the rear
wheels.
From rear (2WD models)
Turn the “ENGINE START STOP”
switch to the ACCESSORY mode
so that the steering wheel is
unlocked.
From rear (4WD models)
Use a towing dolly under the front
wheels.

528
5-1. Essential information
GS_G_U (OM30C80U)
June 29, 2011 10:30 am
NOTICE
■To prevent causing serious damage to the automatic transmission
Never tow this vehicle from the front with the rear wheels on the ground.
■To prevent damaging the vehicle
●Do not tow the vehicle with the “ENGINE START STOP” switch is OFF. 
The steering lock mechanism is not strong 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. Without adequate clearance, the vehicle
could be damaged while being towed.

530
5-1. Essential information
GS_G_U (OM30C80U)
June 29, 2011 10:30 am
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 vehicle
(Water dripping from the air conditioning after use is normal.)
●Flat-looking tires or uneven tire wear
●Engine coolant temperature gauge needle continually points
higher than normal
■Audible symptoms
●Changes in exhaust sound
●Excessive tire squeal when cornering
●Strange noises related to the suspension system
●Pinging or other noises related to the engine
■Operational symptoms
●Engine missing, stumbling or running rough
●Appreciable loss of power
●Vehicle pulls heavily to one side when braking
●Vehicle pulls heavily to one side when driving on a level road
●Loss of brake effectiveness, spongy feeling, pedal almost touches
the floor