2023 TOYOTA TUNDRA check engine

596What to do if... (Troubleshooting)
What to do if... (Troubleshooting)
●If you lose your keys or mechanical keys, new genuine mechanical keys
can be made by your Toyota dealer. ( P. 115)
●If you lose your keys or electronic keys, the risk of vehicle t heft increases
significantly. Contact your Toyota dealer immediately. ( P. 118)
●Is the key battery weak or depleted? (P. 451)
●Vehicles with a smart key system:
Is the engine switch in IGNITION ON mode?
When locking the doors, turn the engine switch off. ( P. 206)
●Vehicles with a smart key system:
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 due to the condition of t he radio
wave. ( P. 134)
●Is the child-protector lock set?
The rear door cannot be opened from inside the vehicle when the lock is
set. Open the rear door from outside and then unlock the child-protector
lock. ( P. 123)
If you have a problem, check the following before contacting
your Toyota 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 opene d (Double Cab models only)

598What to do if... (Troubleshooting)
●Vehicles without a smart key system:
It is locked to prevent theft of the vehicle if the key is removed from the
engine switch. ( P. 203)
●Vehicles with a smart key system:
It is locked automatically to prevent theft of the vehicle. ( P. 208)
●Is the window lock switch pressed?
The power window except for the one at the driver’s seat cannot be oper-
ated if the window lock switch is pressed. ( P. 156)
●The auto power off function will be operated if the vehicle is left in ACCES-
SORY or IGNITION ON mode (the engine is not running) for a peri od of
time. ( P. 207)
●The seat belt reminder light is flashing
Are the driver and the front passenger wearing the seat belts? (P. 483)
●The parking brake indicator is on
Is the parking brake released? ( P. 219)
Depending on the situation, other types of warning buzzer may also sound.
( P. 483, 496)
●Is the electronic key left inside the vehicle?
Check the message on the multi-information display. ( P. 489)
The steering wheel cannot be turned after the engine is
stopped
The windows do not open or close by operating the power
window switches
The engine switch is turned off automatically
(vehicles with a smart key system)
A warning buzzer sounds during driving
A warning buzzer sounds w hen leaving the vehicle
(vehicles with a smart key system)

602Alphabetical index
Child safety ................................ 53Airbag precautions .................. 39
Battery precautions ............... 533
Child restraint system ............. 54
How your child should wear the seat belt ................. 32
Installing child restraints ......... 58
Moon roof precautions .......... 165
Power back window precautions ......................... 161
Power window lock switch .... 156
Power window precautions ... 158
Rear door child-protector ...... 123
Removed wireless remote control/electronic key
battery precautions ............. 453
Seat belt extender precautions ........................... 35
Seat belt precautions .............. 57
Seat heater precautions........ 351
Child-protectors....................... 123
Cleaning ........................... 402, 406 Aluminum wheels.................. 403
Exterior ................................. 402
Interior................................... 406
Seat belts .............................. 407
Clock
*
Compass .................................. 397
Condenser ................................ 425
Console box ............................. 358
Consumption screen ....... 103, 109
Cooling system ........................ 423 Capacity ................................ 547
Checking ............................... 423
Engine overheating ............... 534
Preparing and checking before winter....................... 329 Crawl Control ........................... 318
CRS ............................................. 54
Cruise control
Cruise control ....................... 280
Dynamic radar cruise control ................................ 266
Cup holders ............................. 359
Curtain shield airbags............... 37
Customizable features ............ 568
Daytime running light system.................................... 222
Deck hooks .............................. 367
Defogger Outside rear view
mirrors ........................ 340, 347
Windshield .................... 340, 347
Differential................................ 548
Dimensions .............................. 540
Dinghy towing.......................... 201
Display
Drive information .................. 103
Dynamic radar cruise control ................................ 266
LDA (Lane Departure Alert) ....... 258
Multi-information display ....... 102
Warning message................. 489
Do-it-yourself maintenance .... 415
Door lock Doors .................................... 119
Key ....................................... 119
Smart key system ................. 120
Wireless remote control ........ 119
D

604Alphabetical index
Emergency flashers ................ 472
EngineCompartment ........................ 419
Engine switch................ 202, 205
Hood ..................................... 417
How to start the engine......................... 202, 205
Identification number ............ 543
If the engine will not start ...... 526
Ignition switch (engine switch) ........... 202, 205
Immobilizer system ................. 78
Overheating .......................... 534
Engine coolant ......................... 423 Capacity ................................ 547
Checking ............................... 423
Preparing and checking before winter....................... 329
Engine coolant temperature
gauge........................................ 98
Engine immobilizer system ...... 78
Engine oil ................................. 421 Capacity ................................ 545
Checking ............................... 421
Oil level warning message .... 492
Oil pressure warning message ............................. 490
Preparing and checking
before winter....................... 329
Engine switch (ignition switch)............. 202, 205
Engine switch light (ignition switch light) ............ 353
Event data recorder (EDR) ........ 11 Flat tire ..................................... 511
Floor mats .................................. 26
Fluid
Automatic transmission ........ 549
Brake .................................... 550
Power steering...................... 550
Washer ................................. 430
Fog lights ................................. 229 Replacing light bulbs ............ 464
Switch ................................... 229
Wattage ................................ 553
Four-wheel drive system ........ 303
Front passenger occupant classification system .............. 48
Front personal lights............... 354
Front seats ............................... 139 Adjustment............................ 139
Cleaning ............................... 406
Correct driving posture ........... 28
Head restraints ..................... 145
Seat heaters ......................... 351
Front side marker lights
Light switch ........................... 220
Replacing light bulbs ............ 462
Wattage ................................ 553
Front turn signal lights Replacing light bulbs ............ 463
Turn signal lever ................... 218
Wattage ................................ 553F

612Alphabetical index
Tachometer ................................ 98
Tail lights .................................. 220Light switch ........................... 220
Replacing light bulbs............. 466
Wattage ................................ 553
Tailgate Removing the tailgate ........... 127
Tailgate ................................. 126
Talk switch
*
Telephone switches*
Theft deterrent system Alarm ...................................... 88
Engine immobilizer system ..... 78
Tire inflation pressure ............. 442 Maintenance data ................. 551
Warning light ......................... 484
Warning message ......... 491, 493
Tire information ....................... 557 Glossary................................ 563
Size ....................................... 559
Tire identification number ..... 558
Uniform Tire Quality
Grading............................... 561
Tire pressure warning system .................................... 432
Initializing .............................. 433
Installing tire pressure warning valves and
transmitters......................... 432
Registering ID codes ............ 434
Tire pressure warning reset
switch ................................. 433
Warning light ......................... 484
Warning message ......... 491, 493 Tires .......................................... 431
Chains .................................. 330
Checking............................... 431
If you have a flat tire ............. 511
Inflation pressure .................. 551
Information............................ 557
Replacing.............................. 511
Rotating tires ........................ 431
Size....................................... 551
Snow tires ............................. 331
Spare tire .............................. 512
Tire pressure warning system .......... ...................... 432
Warning light......................... 484
Warning message......... 491, 493
Tonneau cover ......................... 368
Tools ......................................... 512
Top tether strap ................... 66, 68
Total load capacity .......... 182, 541
Towing
Bumper towing...................... 190
Dinghy towing ....................... 201
Emergency towing ................ 479
Trailer towing ........................ 183
Toyota Safety Sense P ............ 237
Automatic High Beam ........... 224
Dynamic radar cruise control ................................ 266
LDA (Lane Departure Alert) ....... 258
PCS
(Pre-Collision System) ....... 245
TRAC (Traction Control) ......... 323
Transmission ........................... 211 Automatic transmission ........ 211
If the shift lever cannot be shifted from P ..................... 214
Manual transmission............. 216
Power mode switch .............. 212
S mode ................................. 213
T