2012 Lexus GX460 air suspension

655
4-3. Do-it-yourself maintenance
4
Maintenance and care
GX460_U.S.A. (OM60J00U)Under the instrument panel
FuseAmpereCircuit
1P/O U T L E T15 APo w e r o u t l e t
2ACC7. 5 A
Outside rear view mirror motor,
BODY ECU, air conditioning system,
audio system, navigation system,
parking assist system, back up relay,
DSS#2 ECU, AT indicator, EFI ECU,
shift lock ECU, DCM, MAYDAY
ECU
3BKUP LP10 A
Back-up lights, audio system, multi
information display, DSS#2 ECU,
parking assist sensor
4TOW I N G B K L P10 ATo w i n g
5AV S20 AAir suspension system
6KDSS10 AKDSS ECU

657
4-3. Do-it-yourself maintenance
4
Maintenance and care
GX460_U.S.A. (OM60J00U)
19ECU-IG NO.210 A
Rear window defogger, outside rear
view mirror memory, seat heater/ven-
tilator switch, inverter relay, air condi-
tioning system, EC mirror, BODY
ECU, exhaust gas sensor, parking
assist sensor, navigation system,
DSS#2 ECU, meter switch, accessory
meter, folding seat ECU, O/H IG,
head light cleaner, rear air condition-
ing system, deicer, D-module, rain
sensor, air suspension, RR VLV ECU,
steering heater, LKA, P/SEAT IND
20S/HTR FR20 ASeat heater and ventilator
21P/ S E AT F R30 AFront power seat (right)
22DOOR P30 A
Front power window (passenger’s
side), outside rear view mirror mem-
ory
23DOOR10 APo w e r w i n d o w
24DOOR D25 AFront power window (driver’s side)
25DOOR RR25 ARear power window (right)
26S/ROOF25 AMoon roof
27WIP30 AWindshield wipers and washer
28WA S H E R20 AWindshield wipers and washer, rear
window wipers and washer
29COOLING10 ACool box
FuseAmpereCircuit

5
When trouble arises
681
5-1. Essential information
GX460_U.S.A. (OM60J00U)
■Before emergency towingThe “ENGINE START STOP” switch must be in the ACCESSORY mode
(engine off) or IGNITION ON mode (engine running).
Put the four-wheel drive control switch in H4. (The center differential is
unlocked.)
Put the vehicle height in the N mode and press height control switch to
turn off the rear height control air suspension.
Shift the shift lever in N.
Release the parking brake.
CAUTION
■Caution while towing
●Use extreme caution when towing the vehicle.
Avoid sudden starts or erratic driving maneuvers which place excessive stress on
the emergency towing eyelets and the cables or chains. Always be cautious of the
surroundings and other vehicles while towing.
●Do not turn the “ENGINE START STOP” switch off.
Doing so will lock the steering wheel an d prevent operation, possibly causing an
accident and resulting in death or serious injury.
●If the engine is not running, the power assist for the brakes and steering will not
function, making steering and braking more difficult.
STEP1
STEP2
STEP3
STEP4
STEP5

5
When trouble arises
683
5-1. Essential information
GX460_U.S.A. (OM60J00U)
If you think something is wrong
If you notice any of the following symptoms, your vehicle probably needs
adjustment or repair. Contact your Lexus dealer as soon as possible.
■Visible symptoms
● Fluid leaks under the vehicle
(Water dripping from the air conditioning after use is normal.)
● Flat-looking tires or uneven tire wear
● Engine coolant temperature gauge needle continually points
higher than normal
■ Audible symptoms
● Changes in exhaust sound
● Excessive tire squeal when cornering
● Strange noises related to the suspension system
● Pinging or other noises related to the engine
■ Operational symptoms
● Engine missing, stumbling or running roughly
● Appreciable loss of power
● Vehicle pulls heavily to one side when braking
● Vehicle pulls heavily to one side when driving on a level road
● Loss of brake effectiveness, sp ongy feeling, pedal almost touches
the floor

702
5-2. Steps to take in an emergency
GX460_U.S.A. (OM60J00U)
(If equipped)
Indicates a malfunction in the rear height control air
suspension system
(Flashes)
(If equipped)Indicates a malfunction in the pre-collision system
(If equipped)
Indicates a malfunction in the intuitive parking assist The malfunctioning assist-sensor is flashing.
Wa r n i n g m e s s a g eDetails

5
When trouble arises
705
5-2. Steps to take in an emergency
GX460_U.S.A. (OM60J00U)
*: The graphic is shown on the Rear height control air suspension display.
Indicates that the glass
hatch is not fully closed
*
If the vehicle reaches a
speed of 3 mph
(5 km/h),
flashes and a buzzer
sounds to indicate that
the glass hatch is not yet
fully closed.
Close the glass hatch.
(Flashes)
(If equipped)
Indicates that the moon
roof is not fully closed
(with the “ENGINE
START STOP” switch off,
and the driver’s door
open)
Close the moon roof.
Wa r n i n g m e s s a g eDetailsCorrection procedure

5
When trouble arises
721
5-2. Steps to take in an emergency
GX460_U.S.A. (OM60J00U)
If you have a flat tire
Remove the flat tire and replace it with the spare provided.
■Before jacking up the vehicle
● Stop the vehicle on a hard, flat surface.
● Set the parking brake.
● Shift the shift lever to P.
● Vehicles with rear height control air suspension: Turn off the
height control. ( →P. 316)
● Stop the engine.
● Turn on the emergency flashers. (→ P. 6 76 )
■ Location of the spare tire, jack and tools
Spare tire
Jack
Tool box

732
5-2. Steps to take in an emergency
GX460_U.S.A. (OM60J00U)
CAUTION
■Using the tire jack
Improper use of the tire jack may lead to death or injuries due to the vehicle sud-
denly falling off the jack.
●Do not use the tire jack for any purpose other than replacing tires or installing and
removing tire chains.
●Only use the tire jack that comes with this vehicle for replacing a flat tire.
Do not use it on other vehicles, and do not use other tire jacks for replacing tires
on this vehicle.
●Always check that the tire jack is securely set to the jack point.
●Be sure to turn off the rear height control air suspension and stop the engine.
●Do not raise the vehicle while someone is in it.
●When raising the vehicle, do not put an object on or under the jack.
●Do not raise the vehicle to a height greater than that required to replace the tire.
●Use a jack stand if it is necessary to get under the vehicle.
●Do not put any part of your body under the vehicle supported by a jack.
●Do not start or run the engine while your vehicle is supported by the jack.
Take particular care when lowering the vehicle to ensure that no one working on or
near the vehicle may be injured.
■Using the jack handle
Tighten all the jack handle bolts securely using a Phillips-head screwdriver, to pre-
vent the extension parts from coming apart unexpectedly.