2012 Lexus GX460 check engine light

696
5-2. Steps to take in an emergency
GX460_U.S.A. (OM60J00U)
The tire pressure warning system may become inoperative in the following condi-
tions:
(When the condition becomes normal, the system will work properly.)
●If electronic devices or facilities using similar radio wave frequencies are nearby.
●If a radio set at similar frequencies is in use in the vehicle.
●If a window tint that affects the radio wave signals is installed.
●If there is a lot of snow or ice on the vehicle, in particular around the wheels or
wheel housings.
●If non-genuine Lexus wheels are used. (Even if you use genuine Lexus wheels,
the tire pressure warning system may not work properly with some types of
tires.)
●If tire chains are used.
●If the spare tire is in a location subject to poor radio wave signal reception.
● If a large metallic object which can interfere with signal reception is put in the
luggage compartment.
■If the tire pressure warning light comes on after blinking for 1 minute frequently
If the tire pressure warning light comes on after blinking for 1 minute frequently
when the engine switch is turned to the “ON” position, have it checked by your
Lexus dealer.
■After changing the engine oil (U.S.A. only)
Make sure to reset the oil maintenance data. (→P. 6 1 4 )

710
5-2. Steps to take in an emergency
GX460_U.S.A. (OM60J00U)
Have the malfunction repaired immediately.After taking the specified steps to correct the suspected problem, check
that the warning message and light go off.
InteriorbuzzerExterior buzzerWarning messageDetailsCorrection
procedure
Sounds
once
(Flashes)
The electronic key
is not detected
when an attempt
is made to start
the engine.
Confirm the loca-
tion of the elec-
tronic key.

742
5-2. Steps to take in an emergency
GX460_U.S.A. (OM60J00U)
■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, etc.
■Charging the battery
The electricity stored in the battery will discharge gradually even when the vehicle
is not in use, due to natural discharge 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.)
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 START STOP” switch off.
Maintain the engine speed of the second vehicle and start the
engine of your vehicle by turning the “ENGINE START STOP”
switch to IGNI TION ON mode.
Once your vehicle’s engine has started, remove the jumper
cables in the exact reverse order in which they were con-
nected.
Once the engine starts, have the vehicle checked at your Lexus dealer
as soon as possible.STEP3
STEP4
STEP5
STEP6

758
6-1. Specifications
GX460_U.S.A. (OM60J00U)
Electrical system
Front differential
*: 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 specification. Please contact your Lexus
dealer for further details.
Battery
Open voltage* 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 rates5A max.
Oil capacity1.48 qt. (1.40 L, 1.23 Imp.qt.)
Oil type and viscosity*Toyota Genuine Differential
Gear Oil LT 75W-85 GL5 or equivalent

823
Alphabetical index
GX460_U.S.A. (OM60J00U)
Electronic keyIf the electronic key does not
operate properly ............................ 739
Emergency, in case of
If the electronic key does not operate properly ............................ 739
If the engine will not start ............... 735
If the shift lever cannot be shifted from P.................................... 737
If the vehicle has discharged
battery.................................................... 741
If the warning buzzer sounds..... 688
If the warning light turns on ......... 688
If the warning message is
displayed ............................................ 700
If you have a flat tire .......................... 721
If you lose your keys ........................ 738
If you think something is
wrong...................................................683
If your vehicle becomes stuck .....747
If your vehicle has to be stopped in an emergency ......... 749
If your vehicle needs to be towed ....................................................677
If your vehicle overheats.................744
Emergency flashers
Switch ...................................................... 676 Engine
Accessory mode..................................179
Compartment..................................... 609
Engine switch .........................................179
Hood ....................................................... 608
How to start the engine ....................179
Identification number .......................753
If the engine will not start................735
Ignition switch ........................................179
Overheating ......................................... 744
Engine compartment cover .............. 610
Engine coolant Capacity ................................................. 757
Checking ................................................ 616
Preparing and checking before winter ................................... 366
Engine coolant temperature gauge....................................................... 195
Engine immobilizer system..................115
Engine oil Capacity .................................................755
Checking .................................................. 611
Preparing and checking before winter ................................... 366
Engine oil maintenance data............. 613
Engine switch ...........................................179
Engine switch light................................. 519
Event data recorder ........................... 685E
*: For vehicles with a navigation system, refer to the “Navigation System Owner’s Manual”.

829
Alphabetical index
GX460_U.S.A. (OM60J00U)
Switch“ENGINE START STOP”
switch ..................................................... 179
Engine switch ........................................ 179
“2nd STRT” switch ............................. 188
Center differential lock/unlock
switch ................................................... 323
“DAC” switch ...................................... 332
Emergency flasher Switch ............ 676
Fog light switch................................... 233
Hazard light Switch .......................... 676
Heated steering wheel switch .... 549
Height control off switch .................316
Ignition switch........................................ 179
Light switches........................................ 219
Power door lock switch.................... 50
Power window switch........................ 101
“RSCA OFF” switch .......................... 137
Rear window defogger switch
*.................................................... 411
Transmission shift switch .................189
Window lock switch ........................... 101
Wipers and washer switch........... 236
Tachometer .............................................. 195
Tail lights Replacing light bulbs ........................672
Switch ........................................................ 219
Talk switch
*............................................ 490
Telephones switch
*............................ 490
Theft deterrent system Alarm ........................................................... 117
Engine immobilizer system ..............115 Tire inflation pressure .........................635
Tire information
Glossary ................................................. 774
Size............................................................770
Tire identification number..............769
Uniform Tire Quality Grading .... 772
Tires Chains .................................................... 366
Checking .............................................. 628
If you have a flat tire ............................ 721
Inflation pressure................................ 762
Information ........................................... 768
Pressure warning system.............. 628
Replacing ................................................. 721
Rotating tires ....................................... 628
Size............................................................ 762
Snow tires ............................................. 366
Spare tire .................................................. 721
Tire pressure warning system ................................................. 628
Tools .............................................................721
Total load capacity ............................... 364
Towing Dinghy towing .................................... 389
Emergency towing............................ 677
Trailer towing .......................................370
T
*: For vehicles with a navigation system, refer to the “Navigation System Owner’s Manual”.