steering Lexus IS250 2007 Basic Functions / LEXUS 2007 IS350/250 (OM53578U) Service Manual

5
When trouble arises
329
5-1. Essential information
■Emergency towing procedure
Release the parking brake.
Put the transmission in N.
Put the engine switch in ACC mode (engine off ) or IG-ON mode (engine
running).
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 eyelets and the cables or chains.
●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 transmission
(for vehicles with an automatic transmission)
Never tow this vehicle from the front with the rear wheels on the ground.
This may cause serious damage to the transmission.
■When towing a vehicle without using a towing dolly
(for vehicles with a manual transmission)
The engine switch must not be OFF.
STEP1
STEP2
STEP3

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When trouble arises
333
5-1. Essential information
Switch to ACC mode so that the
steering wheel is unlocked.
From the rear (2WD models)
Use a towing dolly under the front
wheel.
From the rear (AWD models)
NOTICE
■To prevent damaging the vehicle
●Do not tow the vehicle with the engine switch 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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When trouble arises
337
5-1. Essential information
Event data recorder
In a crash or a near car crash event
The SRS airbag sensor assembly contains the EDR. In a crash or a near
car crash event, this device may record some or all of the following infor-
mation:
●Engine speed
●Whether the brake pedal was applied or not
●Ve h i c l e s p e e d
●To what extent the accelerator pedal was depressed
●Position of the transmission shift lever
●Whether the driver and front passenger wore seat belts or not
●Driver's seat position
●SRS airbag deployment data
●SRS airbag system diagnostic data
If your vehicles is equipped with a vehicle stability control (VSC) system
The VSC Electronic Control Unit (ECU) may contain another EDR. In
case the VSC or Brake Assist system is activated, or the lateral accelera-
tion is beyond a certain valve, this device may record some or all of the
following information:
●Behavior of the vehicle
●Steering wheel angle
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 troubleshooting, there is an event data
recorder (EDR) that records data in a crash or a near car crash event.

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When trouble arises
341
5-2. Steps to take in an emergency
Follow the correction procedures.
After taking the specified steps to correct 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;
• 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 light
Remaining fuel
(Approximately 2.9 gal. [11 L,
2.4 Imp.gal.] or less)
Refuel the vehicle.
(On the instru-
ment cluster)
Driver’s seat belt reminder
light (warning buzzer)
*2
Warns the driver to fasten
his/her seat belt.Fasten the seat belt.

5
When trouble arises
345
5-2. Steps to take in an emergency
Have the vehicle inspected by your Lexus dealer immediately.
A buzzer sounds and a warning message is shown on the multi-informa-
tion display. 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.
Wa r n i n g m e s s a g eDetails
(If equipped)
Indicates a malfunction in the AWD system.
(Flashing and then
continuously on)
Indicates a malfunction in the tire pressure warning
system. (P. 2 8 4 )
(Flashing)
Indicates a malfunction in the steering lock system.

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When trouble arises
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5-2. Steps to take in an emergency
Interior
buzzerExterior
buzzerWa r n i n g m e s s a g eDetailsCorrection
procedure
Once
(For vehicles with an
automatic transmission)
Indicates that a
door has been
opened or closed
and the engine
switch has been
switched twice to
ACC mode from
OFF.
Press the engine
switch while
applying the
brakes.
Once
(For vehicles with a
manual transmission)
Indicates that a
door has been
opened or closed
and the engine
switch has been
switched twice to
ACC mode from
OFF.
Press the engine
switch while
depressing the
clutch pedal.
Once
(Flashing)
Indicates that the
steering lock has
not released
within 3 seconds
of pressing the
engine switch.Press the engine
switch again while
turning the steer-
ing wheel with the
brake pedal
depressed.

366
5-2. Steps to take in an emergency
If the engine will not start
If the engine will not start, even though correct starting procedures are
being followed (
P. 98), consider each of the following points.
■The engine will not start even when the starter motor operates
normally.
One of the following may be the cause of the problem.
●There may not be sufficient fuel in the vehicle’s tank.
Refuel the vehicle.
●The engine may be flooded.
Try to restart the engine once more following correct starting
procedures. (P. 9 8 )
●There may be a malfunction in the engine immobilizer system.
(P. 54)
■The starter motor turns over slowly, the interior lights and head-
lights are dim, or the horn does not sound or sounds at a low vol-
ume.
One of the following may be the cause of the problem.
●The battery may be discharged. (P. 3 7 2 )
●The battery terminal connections may be loose or corroded.
■The starter motor does not turn over, the interior lights and head-
lights do not turn on, or the horn does not sound.
One of the following may be the cause of the problem.
●One or both of the battery terminals may be disconnected.
●The battery may be discharged. (P. 3 7 2 )
●There may be a malfunction in the steering lock system.
Contact your Lexus dealer if the problem cannot be repaired, or if
repair procedures are unknown.

389
6-1. Specifications
6
Vehicle specifications
Steering
Tires and wheels
Type A
Free playLess than 1.2 in. (30 mm)
Ti r e s i z e205/55R16 89W, T125/70D17 98M
(spare)
Front and rear tire inflation pres-
sure
(Recommended cold tire inflation
pressure)
Driving under normal conditions
Front tires:
35 psi (240 kPa, 2.4 kgf/cm
2 or bar)
Rear tires:
38 psi (260 kPa, 2.6 kgf/cm
2 or bar)
Driving at high speeds above 100 mph (160
km/h) (in countries where such speeds are per-
mitted by law)
Add 5.8 psi (40 kPa, 0.4 kgf/cm
2 or bar) to
the front tires and rear tires. Never exceed the
maximum cold tire inflation pressure indicated
on the tire sidewall.
Spare tire inflation pressure
(Recommended cold tire inflation
pressure)
60 psi (420 kPa, 4.2 kgf/cm2 or bar, )
Wheel size16  7JJ, 17  4T (spare)
Wheel nut torque76 ft•lbf (103 N•m, 10.5 kgf•m)

403
6-1. Specifications
6
Vehicle specifications
Warning: The temperature grades for this tire are established for a tire that
is properly inflated and not overloaded.
Excessive speed, underinflation, or excessive loading, either separately or in
combination, can cause heat buildup and possible tire failure.
Glossary of tire terminology
Tire related termMeaning
Accessory weight
The combined weight (in excess of those standard
items which may be replaced) of automatic transmis-
sion, power steering, power brakes, power windows,
power seats, radio and heater, to the extent that these
items are available as factory-installed equipment
(whether installed or not)
Cold tire inflation pres-
sureTire pressure when the vehicle has been parked for
three hours or more, or has not been driven more
than 1 mile or 1.5 km under that condition
Curb weight
The weight of a motor vehicle with standard equip-
ment, including the maximum capacity of fuel, oil and
coolant, and if so equipped, air conditioning and
additional weight optional engine
Maximum inflation pres-
sureThe maximum cold inflated pressure to which a tire
may be inflated, shown on the sidewall of the tire
Maximum loaded vehicle
weight
The sum of:
(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity weight
(d) Production options weight
Normal occupant weight150 lb. (68 kg) times the number of occupants speci-
fied in the second column of Table 1
* that follows

416
Alphabetical index
Alphabetical index
A/C (Air conditioning system) ........ 170
ABS (Anti-lock brake system) ......... 148
AFS (Adaptive front lighting
system) .................................................... 123
Adaptive front lighting system
(AFS)........................................................ 123
Air conditioning filter .......................... 299
Air conditioning system (A/C)
Air conditioning filter ....................... 299
Automatic air conditioning
system .................................................... 170
Airbags
Airbag operating conditions........... 63
Airbag precautions for your
child.......................................................... 67
Airbag warning light ........................340
Curtain shield airbag operating
conditions.............................................. 64
Curtain shield airbag
precautions .......................................... 67
Front passenger occupant
classification system.......................... 72
General airbag precautions ........... 67
Locations of airbags.............................. 61
Modification and disposal of
airbags ...................................................... 71
Proper driving posture ............. 59, 67
Side airbag operating
conditions.............................................. 64
Side airbag precautions .................... 67
SRS airbags ............................................... 61
Alarm ............................................................ 56
Antenna ..................................................... 186
Anti-lock brake system (ABS) ......... 148
Armrest..................................................... 232
Ashtrays .................................................... 225Audio system
Antenna............................................... 186
AUX adapter ...................................... 206
CD player/changer ........................... 189
MP3/WMA disc................................. 195
Optimal use ......................................... 203
Radio ......................................................... 182
Steering wheel audio switch.........207
Automatic air conditioning
system ......................................................170
Automatic headlight leveling
system ...................................................... 124
Automatic light control system......... 122
Automatic transmission
Automatic transmission .....................101
If the shift lever cannot be
shifted from P....................................367
S mode ..................................................... 103
AUX adapter ......................................... 206
BA (Brake assist) ................................... 148
Back-up lights
Wattage ................................................. 394
Battery
Checking................................................279
If the vehicle has discharged
battery .................................................. 372
Preparing and checking
before winter........................................ 161
Bottle holders.......................................... 218
Brake
Fluid ...........................................................278
Parking brake........................................108
Brake assist (BA) ................................... 148A
B