2008 Lexus GS350 engine

455
4-3. Do-it-yourself maintenance
4
Maintenance and care
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June 19, 2008 12:54 pm
FuseAmpereCircuit
10IG210Ignition system, noise filter and ECT
ECU
11EFI NO.210
Fuel system, exhaust system, multi-
port fuel injection system/sequential
multiport fuel injection system, elec-
tronic engine control system, leak
detection pump
12H-LP R LWR15Headlight low beam (right)
13H-LP L LWR15Headlight low beam (left)
14F/ P M P25Fuel system
15EFI25
Multiport fuel injection system/
sequential multiport fuel injection
system, ECT ECU
16INJ25
Multiport fuel injection system/
sequential multiport fuel injection
system
17H-LP UPR15Headlight high beams
18HORN10Horns
19WA S H E R20Windshield wipers and washer
20FR TAIL10Parking lights, side marker light
21FR FOG15Front fog lights
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4-3. Do-it-yourself maintenance
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Light bulbs
You may replace the following bulbs yourself. For more information about
replacing other light bulbs, contact your Lexus dealer.
■Prepare a replacement light bulb
Check the wattage of the light bulb being replaced. ( →P. 5 5 2 )
■ Remove the engine compartment cover if necessary
→ P. 4 0 8
■ Front bulb locations
■ Rear bulb locations
Parking light
Headlight high beam
Rear turn signal light Back-up light
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When trouble arises5
477
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5-1. Essential information..... 478If your vehicle needs to be towed ............................ 478
If you think something is wrong ..................................... 484
Fuel pump shut off system .................................... 485
Event data recorder .............. 486 5-2. Steps to take in an
emergency ................... 488
If a warning light turns on or a warning buzzer sounds... .. 488
If a warning message is displayed................................. 497
If you have a flat tire (Vehicles with standard tires) .............. 512
If you have a flat tire (Vehicles with run-flat tires)................ 522
If the engine will not start .... 523
If the shift lever cannot be shifted from “P”.................... 524
If you lose your keys .............. 525
If the electronic key does not operate properly.......... 526
If the 12 volt battery is discharged ............................ 529
If your vehicle overheats ..... 533
If the vehicle becomes stuck........................................ 536
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5-1. Essential information
If your vehicle needs to be towed
Before towingThe 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.
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 attempted on hard, surfaced roads for short dis-
tances at low speeds.
A driver must be in the vehicle to steer and operate the brakes. The vehi-
cle’s wheels, drive train, axles, steer ing and brakes must be in good condi-
tion.
If towing is necessary, we recommend having your vehicle towed by your
Lexus dealer or a commercial towing se rvice, 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.
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When trouble arises
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5-1. Essential information
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Towing eyelet
■Emergency towing procedureRelease 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).
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 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.
STEP1
STEP2
STEP3
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5-1. Essential information
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Towing with a wheel lift-type truckFrom 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.
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5-1. Essential information
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Using a flat bed truckIf your Lexus is transported by a
flat bed truck, it should be tied
down at the locations shown in the
illustration.
If you use chains or cables to tie
down your vehicle, the angles
shaded in black must be 45°.
Do not overly tighten the tie downs
or the vehicle may be damaged.
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.
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5-1. Essential information
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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, sp ongy feeling, pedal almost touches
the floor
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