battery Lexus GX470 2005 Scheduled Maintenance Guide / LEXUS 2005 GX470 (OM60B11U) Repair Manual

ELECTRICAL COMPONENTS
601
No.FUSEAMPERECIRCUIT
1SPARE10Spare fuse
2ALT140
Charging system and all
components in ªAM1º,
ªHEATERº, ªCDS FANº, ªFR
FOGº, ªDEFOGº, ªAIR SUSº,
ªAC INVº, ªSEAT HEATERº,
ªOBDº, ªSTOPº, ªJ/Bº, ªRR ACº,
ªMIR HEATERº, ªBATT CHGº,
ªTOWING BRKº and ªTOWINGº
fuses
3SPARE15Spare fuse
4HEATER50Air conditioning system
5AIR
SUS50Rear height control air
suspension
6AM150
All components in ªACCº, ªCIGº,
ªIG1º, ªFR WIP±WSHº, ªRR
WIPº, ªRR WSHº, ªDIFFº,
ªECU±IGº, ªTEMSº and ªSTAº
fuses
7TOWING BRK30Trailer brake controller
8J/B50
All components in ªP FR P/Wº,
ªP RR P/Wº, ªD RR P/Wº, ªD
P/SEATº, ªP P/SEATº, ªTAILº,
ªPANELº and ªPOWER OR
TI&TEº fuses
9BATTCHG30Trailer sub battery
10TOWING40Trailer lights
No.FUSEAMPERECIRCUIT

ELECTRICAL COMPONENTS
608
CHECKING BATTERY CONDITION
Precautions
CAUTION
BATTERY PRECAUTIONS
The battery produces flammable and explosive
hydrogen gas.
Do not cause a spark by contacting the battery
terminals with tools.
 Do not smoke or light a match near the battery.
The electrolyte contains poisonous and corrosive
sulfuric acid.
 Avoid contact with eyes, skin or clothes.
 Never inhale or swallow electrolyte.
 Wear protective safety glasses when working near
the battery.
 Keep children away from the battery.
EMERGENCY MEASURES
 If electrolyte gets in your eyes, flush your eyes with
clean water for at l east 15 minutes and get immediate
medical attention. If possible, continue to apply
water with a sponge or cloth while traveling to the
medical office.

ELECTRICAL COMPONENTS
610
Checking battery exterior
1Terminals2Hold±down clamp
Check the battery for corroded or loose connections,
cracks, or loose hold±down clamps.
1. If the battery is corroded, wash it off with a solution of warm
water and baking soda. Coat the terminals with grease to
prevent further corrosion.
2. If the connections are loose, tighten the clamp bolts Ð but
do not overtighten.
3. Tighten the hold±down clamp only enough to keep the
battery firmly in place. Overtightening may damage the battery
case.

ELECTRICAL COMPONENTS
611
NOTICE
Make sure the engine and all accessories are turnedoff before performing maintenance.
When checking the battery, remove the ground cable
first and reinstall it last.
Be careful not to cause a short circuit with tools.
Take care no solution gets into the battery when washing it.
If the battery is disconnected or run down
The power windows and moon roof may not operate
automatically and the jam protection function will not function
correctly after you reconnect, replace or recharge the battery.
In any of these cases, you should normalize the power
windows and moon roof. To normalize the power windows and
moon roof, see pages 50 and 118.
Checking battery condition
Check the battery condition by the indicator color.
1BLUE Ð Good condition.
2WHITE Ð Charging necessary. Have the battery
checked by your Lexus dealer.
3RED Ð Have the battery checked by your Lexus dealer.

ELECTRICAL COMPONENTS
612
NOTICE
Do not refill the battery with water.

ELECTRICAL COMPONENTS
613
BATTERY RECHARGINGPRECAUTIONS
During recharging, the battery is producing hydrogen
gas.
Therefore, before recharging:
1. If recharging with the battery installed on the vehicle, be
sure to disconnect the ground cable.
2. Make sure the power switch on the recharger is off when
connecting the charger cables to the battery and when
disconnecting them.
CAUTION
Always charge the battery in an unconfined area. Do
not charge the battery in a garage or closed room
where there is not sufficient ventilation.
 Only do a slow charge (5 A or less). Charging at a
quicker rate is dangerous. The battery may explode
causing personal injuries.
NOTICE
Never recharge the battery while the engine is running.
Also, make sure all accessories are turned off.

ELECTRICAL COMPONENTS
617

Driver's side instrument panel

Good
Blown
If the headlights or other electrical components do not
work and the blade type fuses are O.K., check the
cartridge type fuses. If any of the cartridge type fuses are
blown, they must be replaced.
If there is an overload in the circuits from the battery, the fuses
are designed to blow before the entire wiring harness is
damaged.
CAUTION
Always use a genuine Lexus fuse or equivalent for
replacement. Never install an ordinary wire Ð even for
a temporary fix. This may cause extensive damage and
possibly a fire.
NOTICE
Before replacing the fuses, have the cause of electrical overload determined and repaired by your Lexus dealer.