Lexus GS300, User Manual

Page: 486 / 622

IN CASE OF AN EMERGENCY
465
G40027
GS300 5 Discharged battery 6 Booster battery
GS300 only—Before carrying out the following procedure,
remove the engine compartment cover. (See page 504.)
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.
When boosting, use the battery of matching or higher quality.
Any other battery may be difficult to jump start with.
If jump starting is difficult, charge the battery for several
minutes.
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 (such
as shown in the illustration) away from the battery. Do not
connect it to or near any part that moves when the engine
is cranked.