2006 LEXUS LS430 Owners Manual

5
When trouble arises
353
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.94), consider each of the following points. 
Contact your Lexus dealer if the problem cannot be repaired, or if repair pro -
cedures are unknown.
■ The engine will not start even wh en the starter motor operates nor-
mally
One of the following may be the cause of the problem.
• There may not be sufficient fuel in the vehicle’s tank. 
Add fuel to the vehicle.
• The engine may be flooded. 
Try to restart the engine once mor
e following correct starting
procedures (
P. 94 ). Hold the ignition switch in the START posi -
tion for a slightly longer period (u p to a maximum of 15 seconds).
■ The star
ter motor turns over slowly , the interior lights and headlights
are dim, or the horn does not sound or sounds at a low volume.
One of the following may be the cause of the problem.
• The battery may be discharged. (
P.356 )
• The battery terminal connectio ns may be loose or corr
oded.
■ The star
ter 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.356 )
• There may be a malfunction in the engine immobilizer system.  (
P.54)

354
5-2. Steps to take in an emergency
If the transmission selector lever cannot be shifted from P
If the transmission selector lever cannot be shifted with your foot on the
brake, there may be a problem with the shift lock system (a system to prevent
accidental operation of the selector lever). Have the vehicle inspected by
your Lexus dealer immediately.

The following steps may be used as an
emergency measure to ensure the
selector lever can be shifted.
Set the parking brake.
Turn the ignition switch to ACC.
Depress the brake pedal.
Pry the cover up with a flat head
s
crewdriver or equivalent.
Insert your finger, the sc rewd
river
or equivalent into the hole to push
down the shift lock override but -
ton. You can shift the selector lever
while pushing the button.

5
When trouble arises
355
5-2. Steps to take in an emergency
If you lose your keys
■If a key with a built-in remote control is lost
The vehicle settings can be changed so that the wireless remote control function
do
es not operate. 
Contact your Lexus dealer for more information.
New keys can be ordered from your Lexus dealer
If all the master keys are lost, the onboard computer must also be replaced.

356
5-2. Steps to take in an emergency
If the vehicle has a discharged battery
The following procedures may be used to start the engine in the event the
vehicle if battery is discharged.

You can call your Lexus dealer, Roadside Assistance or Lexus Customer Ser -
vice Assistance.
If you have a set of jumper (or boos ter) cables and a second vehicle with a
12-volt battery, you can jump start y our Lexus following the steps below.
Connecting the jumper cables.If required, remove all vent
plugs from the booster battery.
Lay a cloth o
ver the open vents
on the booster battery. (This
helps reduce the explosion haz -
ard, personal injuries and
bur
ns.)
Positive (+) battery terminal on
your vehicle.
Positive (+) battery terminal on
the second vehicle.
Negative (-) battery terminal on
the second vehicle.
Connect the jumper cable to
ground on your vehicle as
sho
wn in the illustration.
Start the engine of the second vehicle. 
Increase the engine speed slightly and maintain at that le
vel for
approximately five minutes.
Maintain the engine speed on the second vehicle and start the
vehicle’s engine.
Once the vehicle’s engine has st ar
ted, remove the exact reverse
jumper cables in the exact reverse or
der in which they were con-
nected.
1
2
3
4
5

5
When trouble arises
357
5-2. Steps to take in an emergency
■Avoiding a discharged battery
●Turn off the headlights and the audio system while the engine is turned off.
●Turn off any unnecessary electrical comp onents when the vehicle runs at a low
speed for an extended period, such as in heavy traffic, etc.
CAUTION
■Avoiding battery fires or explosions
Observe the following precautions to prevent accidentally igniting the flammable
ga

s that may be emitted from the battery.
• Make sure the jumper cable is connected to
the correct terminal and that it is
not unintentionally in contact with any part other than the intended terminal.
• Do not allow the booster cables to come into cont
act with the + and - terminals.
• Do not generate a flame near the battery b
y using a match, cigarette lighter, or
smoking.
■Battery precautions
The battery contains poisonous and corrosive electrolyte, while related parts con -
tain lead and lead compounds. 
Observe the following precautions when handling the battery.
• Do not lean over the battery
• When working with the battery, always we ar safety glas
ses and take care not to
allow any battery fluids (acid) to come into contact with skin, clothing or the
vehicle body.
• In the event that battery fluid comes into co
ntact with the skin or eyes, immedi-
ately wash the affected area with water and seek medical attention. Place a wet
sp
onge or cloth over the affected area until medical attention can be received.
• Always wash your hands after ha
ndling battery-related parts.
• Do not allow children near the battery.
Once the engine starts, have the vehicle checked at your Lexus dealer as
soon as possible.

358
5-2. Steps to take in an emergency
NOTICE
■To prevent damaging the vehicle
Do not pull- or push-start the vehicle, because the three-way catalytic converter
ma
y overheat and become a fire hazard.
■When handling jumper cables
Be careful that the jumper cables do not bec
ome tangled in the cooling fan or any
of the belts when connectin g or disconnecting them.

5
When trouble arises
359
5-2. Steps to take in an emergency
If your vehicle overheats
If your engine overheats
Stop the vehicle in a safe place and turn off the automatic climate
control.
Check to see if steam is coming out from under the hood.
If you see steam: 
Stop the engine.
If you do not see steam: 
Leave the engine running and carefully lift the hood.
Check to see if the cooling fan is operating.
If the fan is operating: 
Wait until the temperature of the engine (shown in the instrument clus -
ter) begins to fall and then stop the engine.
If the fan is not operating: 
Stop the engine and call your local Lexus dealer.
After the engine has cooled down
sufficiently, check the level of
engine coolant and inspect the
radiator core (radiator) for any
leaks.

360
5-2. Steps to take in an emergency
■Overheating
If you observe the following, your vehicle may be overheating.
• The engine coolant temperatur
e gauge enters the red zone or a loss of power is
experienced.
• Steam is coming out from under the hood.
CAUTION
■To prevent an accident or injury when in specting under the hood of your vehicle
●Keep hands and clothing away from the fan and other belts while the engine is
running.
●Do not loosen the radiator cap while the engine and radiator are hot. 
Serious injury could result from scalding hot fluid and steam blown out under
pr
essure.
NOTICE
■When adding engine coolant
Wait until the engine has cooled do wn befor
e adding engine coolant.
When adding coolant, do so slowly. Adding cool coolant to a hot engine too quickly
ca
n cause damage to the engine.
Add engine coolant if required.
Water can be used as an emer -
gency measure if engine coolant is
una
vailable.( P.367 )