check engine Lexus GX460 2014 Using the air conditioning system and defogger / LEXUS 2014 GX460 (OM60K80U) Service Manual

5197-2. Steps to take in an emergency
GX460_OM_OM60K80U_(U)
7
When trouble arises
Indicates that the automatic transmission fluid tempera-
ture is too high A buzzer also sounds.
 Immediately stop the vehicle in a safe place, shift the
shift lever to P and wait until the warning message
and light go off. If the warning message and light go
off, you may start the vehicle again.
If the warning message and light do not go off, con-
tact your Lexus dealer.
Indicates a malfunction in the automatic transmission
system A buzzer also sounds.
 Have the vehicle inspected by your Lexus dealer.
Indicates that the moon roof is not fully closed (with the
engine switch off, and the driver’s door open)
A buzzer also sounds.
 Close the moon roof.
Indicates that engine oil level is low
A buzzer also sounds.
 Check the level of engine oil, and add if necessary.
Indicates a malfunction in:
• The LED headlight system;
• The automatic headlig ht leveling system; or
• The Automatic High Beam system (if equipped) A buzzer also sounds.
 Have the vehicle inspected by your Lexus dealer.
Indicates that the wash er fluid level is low
 Add washer fluid.
Wa r n i n g m e s s a g eDetails/Actions
(Flashes)

5297-2. Steps to take in an emergency
GX460_OM_OM60K80U_(U)
7
When trouble arises
CAUTION
■Using the tire jack
Improper use of the tire jack may cause the vehicle to suddenly fall off the jack, leading
to death or serious injury.
●Do not use the tire jack for any purpose ot her 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.
●Do not put any part of your body under the vehicle while it is supported by the jack.
●Do not start or run the engine while your vehicle is supported by the jack.
●Do not raise the vehicle while someone is inside.
●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.
●Be sure to turn off the height control and stop the engine.
Take particular care when lowering the ve hicle to ensure that no one working on or
near the vehicle will be injured.
■Using the jack handle
Tighten all the jack handle bolts securely using a Phillips-head screwdriver, to prevent
the extension parts from coming apart unexpectedly.

5467-2. Steps to take in an emergency
GX460_OM_OM60K80U_(U)
Start the engine of the second vehicle. Increase the engine speed slightly and
maintain at that level for approximately 5 minutes to recharge the battery of
your vehicle.
Open and close any of the doors of your vehicle with the engine switch off.
Maintain the engine speed of the second vehicle and start the engine of your
vehicle by turning the engine switch to IGNITION ON mode.
Once your vehicle’s engine has started, remove the jumper cables in the exact
reverse order in which they were connected.
Once the engine starts, have the vehicle checked at your Lexus dealer as soon
as possible.
■Starting the engine when the battery is discharged
The engine cannot be started by push-starting.
■To prevent battery discharge
●Turn off the headlights and the audio system while the engine is off.
●Turn off any unnecessary electrical components when the vehicle is running at a low
speed for an extended period, such as in heavy traffic.
■Charging the battery
The electricity stored in the battery will discharge gradually even when the vehicle is not
in use, due to natural discharg e and the draining effects of certain electrical appliances. If
the vehicle is left for a long time, the battery may discharge, and the engine may be
unable to start. (The battery recharges automatically during driving.)
■When recharging or replacing the battery
●Make sure that the key is not inside the vehicle when recharging or replacing the bat-
tery. The key may be locked in the vehicle if the alarm is activated. ( P. 6 9 )
●In some cases, it may not be possible to unlock the doors using the smart access system
with push-button start when the battery is discharged. Use the wireless remote control
or the mechanical key to lock or unlock the doors.
●The engine may not start on the first attempt after the battery has recharged but will
start normally after the second attempt. This is not a malfunction.
●The engine switch mode is memorized by the vehicle. When the battery is recon-
nected, the system will return to the mode it was in before the battery was discharged.
Before disconnecting the battery, turn the engine switch off. If you are unsure what
mode the engine switch was in before the battery discharged, be especially careful
when reconnecting the battery.
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5497-2. Steps to take in an emergency
GX460_OM_OM60K80U_(U)
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When trouble arises
The coolant level is satisfactory if it is between the “F” and “L” lines on the res-
ervoir. Reservoir
“F”
“L”
Radiator cap
Add coolant if necessary. ( P. 4 5 2 )
Water can be used in an emergency if
coolant is unavailable.
Start the engine and turn the air conditioning system on to check that the radi-
ator cooling fans operate and to check for coolant leaks from the radiator or
hoses.
The fans operate when the air conditioning system is turned on immediately after a
cold start. Confirm that the fans are oper ating by checking the fan sound and air flow.
If it is difficult to check th ese, turn the air conditioning system on and off repeatedly.
(The fans may not operate in freezing temperatures.)
If the fans are not operating:
Stop the engine immediately and contact your Lexus dealer.
If the fans are operating:
Have the vehicle inspected at the nearest Lexus dealer.
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556
GX460_OM_OM60K80U_(U)8-1. Specifications
■Engine number
The engine number is stamped on the engine block as shown.
*: The engine oil capacity is a reference quantity to be used when changing the engine
oil. Warm up and turn off the engine, wait more than 5 minutes, and check the oil level
on the dipstick.
Engine
Model4.6L 8-cylinder (1UR-FE)
Ty p e8-cylinder V type, 4-cycle, gasoline
Bore and stroke3.70  3.27 in. (94.0  83.0 mm)
Displacement281.2 cu.in. (4608 cm3)
Drive belt tensionAutomatic adjustment
Fuel
Fuel typeUnleaded gasoline only
Octane rating91 (Research Octane Number 96) or higher
Fuel tank capacity (Reference)23.0 gal. (87 L, 19.1 Imp.gal.)
Lubrication system
Oil capacity
(Drain and refill — reference*)
With filter
Without filter8.2 qt. (7.8 L, 6.9 Imp.qt.)
7.8 qt. (7.4 L, 6.5 Imp.qt.)

GX460_OM_OM60K80U_(U)
5598-1. Specifications
8
Vehicle specifications
*: Your Lexus vehicle is filled with “Toyota Genuine Differential Gear Oil” at the factory.Use Lexus approved “Toyota Genuine Differential Gear Oil” or an equivalent of
matching quality to satisfy the above specif ication. Please contact your Lexus dealer
for further details.
*: Your Lexus vehicle is filled with “Toyota Genuine Differential Gear Oil” at the factory. Use Lexus approved “Toyota Genuine Differential Gear Oil” or an equivalent of
matching quality to satisfy the above specif ication. Please contact your Lexus dealer
for further details.
Electrical system (battery)
Specific gravity reading at
68 F (20 C):12.6  12.8 V Fully charged
12.2  12.4 V Half charged
11.8  12.0 V Discharged
(*: Voltage is checked 20 minutes after the engine
and all the lights are turned off.)
Charging rates5 A max.
Front differential
Oil capacity1.48 qt. (1.40 L, 1.23 Imp.qt.)
Oil type and viscosity*Toyota Genuine Differential Gear Oil LT 75W-85
GL-5 or equivalent
Rear differential
Oil capacity2.85 qt. (2.70 L, 2.38 Imp.qt.)
Oil type and viscosity*Toyota Genuine Differential Gear Oil LT 75W-85
GL-5 or equivalent

604What to do if... (Troubleshooting)
GX460_OM_OM60K80U_(U)
What to do if... (Troubleshooting)
●If you lose your mechanical keys, new genuine mechanical keys can be made
by your Lexus dealer. ( P. 8 9 )
●If you lose your electronic keys, the risk of vehicle theft increases significantly.
Contact your Lexus dealer immediately. ( P. 8 9 )
●Is the electronic key battery weak or depleted? ( P. 4 7 9 )
●Is the engine switch in IGNITION ON mode?
When locking the doors, turn the engine switch off. ( P. 1 8 2 )
●Is the electronic key left inside the vehicle?
When locking the doors, make sure that you have the electronic key on your
person.
●The function may not operate properly du e to the condition of the radio wave.
( P. 1 1 0 )
●Is the child-protector lock set?
The rear door cannot be opened from in side the vehicle when the lock is set.
Open the rear door from outside and then unlock the child-protector lock.
( P. 9 5 )
If you have a problem, check the following before contacting your Lexus
dealer.
The doors cannot be locked, unlocked, opened or closed
You lose your keys
The doors cannot be locked or unlocked
The rear door cannot be opened

611Alphabetical index
GX460_OM_OM60K80U_(U)
Emergency flashers ............................. 498
EngineAccessory mode................................. 182
Compartment....................................... 451
Hood ....................................................... 450
How to start the engine ..................... 181
Identification number ...................... 556
If the engine will not start............... 540
Ignition switch (engine switch)....... 181
Overheating ........................................ 548
Engine compartment cover ...............451
Engine coolant....................................... 455 Capacity ................................................ 558
Checking............................................... 455
Preparing and checking before winter ................................... 366
Engine immobilizer system ................. 66
Engine oil ................................................. 453 Capacity ................................................ 556
Checking................................................453
Preparing and checking before winter ................................... 366
Engine switch ............................................ 181
Engine switch light ............................... 392
EDR .................................................................10 Flat tire .......................................................527
Floor mats.................................................... 24
Fluid
Automatic transmission ................. 560
Brake..........................................................561
Steering .................................................. 562
Washer ................................................... 463
Fog lights.................................................. 200 Switch ................................................. 200
Wattage .................................................563
Four-wheel drive system................... 332
Front passenger occupant classification system ............................45
Front passenger’s seat belt reminder light ..................................... 509
Front position lights ............................... 192 Light switch............................................. 192
Wattage .................................................563
Front seats .................................................. 115 Adjustment............................................... 115
Cleaning................................................. 437
Correct driving posture .................... 26
Driving position memory.................128
Head restraints ..................................... 132
Seat heaters ..........................................390
Seat position memory .......................128
Front turn signal lights ..........................190 Replacing light bulbs .......................490
Turn signal lever .................................. 190
Wattage .................................................563F
*:For vehicles with a navigation system or a multimedia system, refer to the
“NAVIGATION SYSTEM OWNER’S MANUAL” or “MULTIMEDIA OWNER’S MANUAL”.

617Alphabetical index
GX460_OM_OM60K80U_(U)
Door lock switches ..............................99
Driving position memory switches ................................................ 128
Emergency flashers switch .......... 498
Engine switch .......................................... 181
Fog light switch .................................. 200
Four-wheel drive control switch.................................................... 332
Headlight cleaner switch .............. 209
Height control button ...................... 327
LDA switch ...........................................228
Light switches ....................................... 192
Moon roof switches........................... 145
Multi-terrain Monitor switch ....... 303
Multi-terrain Select switch............ 298
“ODO TRIP” button .................... 78, 81
Outside rear view mirror switches ................................................ 139
Parking assist........................................ 234
PCS off switch .................................... 358
Power door lock switch ....................99
Power window switch .......................142
Rear window wiper and washer switch...................................207
Rear window and outside rear view mirror
defoggers switch ............................. 381
Seat heater switches........................ 390
Talk switch Tilt and telescopic steering
control switch.....................................135
Vehicle-to-vehicle distance button ..................................................... 219
VSC OFF switch ............................... 343
Window lock switch .......................... 142
Windshield wipers and washer switch .................................. 202
Tachometer ................................................ 77
Tail lights .................................................... 192 Light switch............................................. 192
Talk switch
*
Telephone switch
*
Theft deterrent system Alarm .......................................................... 68
Engine immobilizer system ............. 66
Tire inflation pressure........................... 471 Maintenance data................................ 471
Tires ............................................................464 Chains ..................................................... 366
Checking ............................................... 464
If you have a flat tire .......................... 527
Inflation pressure.................................. 471
Information............................................ 567
Replacing ............................................... 527
Rotating tires ........................................ 464
Size ........................................................... 562
Snow tires ..............................................368
Spare tire................................................ 527
Tire pressure warning system .................................................. 465
T
*:For vehicles with a navigation system or a multimedia system, refer to the
“NAVIGATION SYSTEM OWNER’S MANUAL” or “MULTIMEDIA OWNER’S MANUAL”.