1998 Lexus LS400 jump start terminals

IN CASE OF AN EMERGENCY
193
IF YOUR ENGINE STALLS WHILE
DRIVING
If your engine stalls while driving . . . .
1. Reduce your speed gradually, keeping a straight line. Move
cautiously off the road to a safe place.
2. Turn on your emergency flashers.
3. Try starting the engine again.
If the engine will not start, see ”If your vehicle will not start”.
CAUTION
If the engine is not running, the power assist for the brakes and
steering will not work, so steering and braking will be much
harder than usual.
IF YOUR VEHICLE WILL NOT
START
(a) Simple checks
Before making these checks, make sure you have followed the
correct starting procedure instructions in ”How to start the engine”
on page 159 and that you have sufficient fuel. Since your vehicle is
equipped with the engine immobiliser system, also check whether
the other keys will start the engine. If they work, your key may be
broken. Have the key checked at your Lexus dealer. If none of your
keys work, the system is possibly broken. Call your Lexus dealer.
See ”Keys” on page 8.If the engine is not turning over or is turning over too slowly
1. Check that the battery terminals are tight and clean.
2. If the battery terminals are O.K., switch on the interior light.
3. If the light is out, dim or goes out when the starter is cranked, the
battery is discharged. You may try jump starting. See ”(c) Jump
starting” for further instruction.
If the light is O.K., but the engine still will not start, it needs
adjustment or repair. Call a Lexus dealer, Roadside Assistance or
Customer Service Assistance. (See ”Foreword”.)
NOTICE
Do not pull or pushstart the vehicle. It may damage the
vehicle or cause a collision when the engine starts. Also the
threeway catalytic converter may overheat and become a fire
hazard.
If the engine turns over at its normal speed but will not start
1. The engine may be flooded because of repeated cranking. See
”(b) Starting a flooded engine” for further instructions.
2. If the engine still will not start, it needs adjustment or repair. Call
a Lexus dealer, Roadside Assistance or Customer Service
Assistance. (See ”Foreword”.)

IN CASE OF AN EMERGENCY
195
40L002-7
5
Discharged battery 6
Booster battery
JUMP STARTING PROCEDURE
1. If the booster battery is installed in another vehicle, make sure the
vehicles are not touching. Turn off all unnecessary lights and
accessories.2. If required, remove all the vent plugs from the booster battery.
Lay a cloth over the open vents on the booster battery. (This helps
reduce the explosion hazard, personal injuries and burns.)
If the booster battery is an extended maintenance interval battery, it
is not necessary to remove the vent plugs.
3. If the engine in the vehicle with the booster battery is not running,
start it and let it run for about 5 minutes. During jump starting, run
the engine at about 2000 rpm with the accelerator pedal lightly
depressed.
4. Locate positive (+) and negative () terminals of each battery.
Connect the jumper cables in the exact order (
1
2
3
4
)
shown in the illustration.
1
Connect a positive (red) jumper cable clamp to the positive (+)
terminal of the discharged battery.
2
Connect the clamp at the other end of the positive (red) cable
to the positive (+) terminal of the booster battery.
3
Connect a negative (black) cable clamp to the negative ()
terminal of the booster battery.
4
Connect the clamp at the other end of the negative (black) cable
to a solid, stationary, unpainted metallic point (e.g. engine
hanger) away from the battery. Do not connect it to or near any
part that moves when the engine is cranked.

IN CASE OF AN EMERGENCY
196
CAUTION
When making the connections, to avoid serious injury, do not
lean over the battery or accidentally let the jumper cables or
clamps touch anything except the correct battery terminals or
the ground.
5. Start your engine in the normal way. After starting, run it at about
2000 rpm for several minutes with the accelerator pedal lightly
depressed.
6. Carefully disconnect the cables in the exact reverse order: the
negative cable and then the positive cable.
7. Carefully dispose of the battery cover cloths which may now
contain sulfuric acid.
8. If removed, replace all the battery vent plugs.
If the cause of your battery discharging is not apparent (for example,
lights left on), you should have it checked.
IF YOUR VEHICLE OVERHEATS
If your engine coolant temperature gauge indicates overheating,
if you experience a loss of power, or if you hear a loud knocking
or pinging noise, the engine has probably overheated.
When the engine overheats
Pull safely off the road, stop the vehicle and turn on your emergency
flashers. Put the transmission in ”P” and apply the parking brake.
A: If steam is coming from your engine:
Turn off the engine. Leave the hood closed until there is no sign of
steam or coolant. Your engine could have been seriously damaged
already. Call your Lexus dealer for assistance.
CAUTION
To help avoid personal injury, keep the hood closed until there
is no steam. Escaping steam or coolant is sign of very high
pressure.