2008 Lexus GX470 power

313
4-2. Maintenance
4
Maintenance and care
General maintenance
Engine compartment
ItemsCheck points
Battery• Maintenance-free (P. 3 3 3 )
Brake fluid• At the correct level? ( P. 3 3 0 )
Engine coolant• At the correct level? ( P. 3 2 8 )
Engine oil• At the correct level? ( P. 3 2 3 )
Exhaust system• No fumes or strange sounds?
Power steering fluid• At the correct level? ( P. 3 3 1 )
Radiator/condenser/hoses• Not blocked with foreign matter?
(P. 3 2 9 )
Wa s h e r f l u i d• At the correct level? ( P. 3 3 5 )
Listed below are the general maintenance items that should be performed
at the intervals specified in the “Warranty and Services Guide/Owner’s
Manual Supplement”. It is recomme nded that any problem you notice
should be brought to the attention of your Lexus dealer or qualified service
shop for advice.

318
4-3. Do-it-yourself maintenance
ItemsPa r t s a n d t o o l s
Engine oil level (P. 3 2 3 )
• “Toyota Genuine Motor Oil” or
equivalent
• Rag or paper towel, funnel (used only for adding engine oil)
Fuses ( P. 3 5 5 )• Fuse with same amperage rating as
original
Power steering fluid level ( P. 3 3 1 )
• Automatic transmission fluid
DEXRON® II or III
•Rag or paper towel
• Clean funnel
Radiator and condenser ( P. 3 2 9 )
Tire inflation pressure ( P. 3 4 3 )• Tire pressure gauge
• Compressed air source
Wa s h e r f l u i d ( P. 3 3 5 )
• Water washer fluid containing anti-
freeze (for winter use)
•Funnel

321
4-3. Do-it-yourself maintenance
4
Maintenance and care
Engine compartment
Engine oil level dipstick(P. 323)
Engine oil filler cap (P. 324)
Brake fluid reservoir (P. 330)
Fuse box ( P. 355)
Battery ( P. 333)Condenser ( P. 3 2 9 )
Electric cooling fan
Engine coolant reservoir (P. 328)
Radiator ( P. 3 2 9 )
Washer fluid tank ( P. 3 3 5 )
Power steering fluid reservoir (P. 3 3 1 )

331
4-3. Do-it-yourself maintenance
4
Maintenance and care
Power steering fluid■ Fluid level
The fluid level should be within the appropriate range.
Full (when cold)
Add fluid (when cold)
Full (when hot)
Add fluid (when hot)
Hot: The vehicles has been driv en around 50 mph (80 km/h) for 20
minutes, or slightly longer in frigid temperatures. (Fluid temperature,
140F - 175 F [60C - 80 C]).
Cold: The engine has not been ru n for about 5 hours. (Room tempera-
ture, 50 F - 85F [10C - 30 C]).
NOTICE
■If the fluid level is low or high
It is normal for the brake fluid level to go down slightly as the brake pads wear or
when the fluid level in the accumulator is high.
If the reservoir needs frequent refilli ng, it may indicate a serious problem.

332
4-3. Do-it-yourself maintenance
■Checking the fluid level
Make sure to check the fluid type and prepare the necessary items.
Clean all dirt off the reservoir.
Remove the cap by turning it counterclockwise.
Wipe the dipstick clean.
Reinstall and remove the reservoir cap again.
Check the fluid level.
Fluid typeAutomatic transmission fluid DEXRON® II or III
ItemsRag or paper, clean funnel (only for adding fluid)
CAUTION
■When checking the reservoir
Take care, as the reservoir may be hot.
NOTICE
■When adding fluid
Avoid overfilling, or the power steering may be damaged.
■After replacing the reservoir cap
Check the steering box case, vane pump and hose connections for leaks or dam-
age.
STEP1
STEP2
STEP3
STEP4
STEP5

333
4-3. Do-it-yourself maintenance
4
Maintenance and care
Battery■ Exterior
Make sure that the battery terminals are not corroded and that there
are no loose connections, cracks, or loose clamps.
Terminals
Hold-down clamp
■ Checking condition
Check the battery condition by the indicator color.
Blue: Good.
White: Charging is necessary.Have the vehicle inspected
by your Lexus dealer.
Red: Not working properly, have the battery checked by your
Lexus dealer.
■Before recharging
When recharging, the battery produces hydrogen gas which is flammable and
explosive. Therefore, before recharging:
●If recharging with the battery installed on the vehicle, be sure to disconnect the
ground cable.
●Make sure the power switch on the charger is off when connecting and discon-
necting the charger cables to the battery.

357
4-3. Do-it-yourself maintenance
4
Maintenance and care
Fuse layout and amperage ratings■ Engine compartment
FuseAmpereCircuit
1ALT140
Charging system, AM1, HEATER,
CDS FAN, FR FOG, DEFOG, AIR
SUS, AC INV, SEAT HEATER, OBD,
STOP, J/B, RR AC, MIR HEATER,
BATT CHG, TOWING BRK, TOW-
ING
2HEATER50Air conditioning system
3AIR SUS50Rear height control air suspension
4AM150
ACC, CIG, IG1, FR WIP-WSH, RR
WIP, RR WSH, DIFF, ECU-IG,
TEMS, STA
5TOWING BRK30Trailer brake controller
6J/B50
P FR P/W, P RR P/W, D RR P/W, D
P/ S E AT, P P/ S E AT, TA I L , PA N E L ,
POWER OR TI&TE
7BATT CHG30Trailer sub battery

358
4-3. Do-it-yourself maintenance
FuseAmpereCircuit
8TOW I N G40Trailer lights
9CDS FAN20Electric cooling fan
10RR A/C30Rear air conditioning system
11MIR HEATER10Outside rear view mirror defogger
12STOP10
Stop lights, high mounted stoplight,
shift lock control system, vehicle sta-
bility control system, electronic mod-
ulated suspension, rear height control
air suspension, multiport fuel injec-
tion system/sequential multiport fuel
injection system
13AC INV15Power outlet (115V AC)
14FR FOG15Front fog lights
15OBD7. 5On-board diagnosis system
16HEAD (LO RH)10Right hand headlight (low beam)
17HEAD (LO LH)10Left hand headlight (low beam)
18HEAD (HI RH)10Right hand headlight (high beam)
19HEAD (HI LH)10Left hand headlight (high beam)
20EFI NO.210
Multiport fuel injection system/
sequential multiport fuel injection
system
21HEATER No.27. 5Air conditioning system
22DEFOG30Rear window defogger
23AIRSUS NO.210Rear height control air suspension
24S E AT H E AT E R20Seat heaters