Page 458 of 504
4588-2. Steps to take in an emergency
AYGO_OM_Europe_OM99R19E
If the electronic key does not operate properly  
(vehicles with a smart entry & start system)
Use the mechanical key (P.  1 1 2 ) 
in order to perform the following 
operations:
Locks all the doors 
Unlocks all the doors
If communication between the electronic key and vehicle is 
interrupted ( P. 132) or the electronic key cannot be used 
because the battery is depleted, the smart entry & start system
and wireless remote control cannot be used. In such cases, the 
doors can be opened and the engine can be started by following 
the procedure below.
Locking and unlocking the doors
1
2 
         
        
        
     
        
        Page 459 of 504
4598-2. Steps to take in an emergency
8
When trouble arises
AYGO_OM_Europe_OM99R19E
Ensure that the shift lever is in N and depress the brake pedal 
(multi-mode manual transmission) or clutch pedal (manual trans- 
mission). 
Touch the corner of the elec- 
tronic key with the indicator to 
the engine switch.
When the electronic key is 
detected, a buzzer sounds and the 
engine switch will turn to IGNITION 
ON mode. 
When the smart entry & start sys- 
tem is deactivated in customization 
setting, the engine switch will turn
to ACCESSORY  mode.
Firmly depress the brake pedal (multi-mode manual transmission) 
or clutch pedal (manual transmission) and check that smart entry & 
start system indicator light (green) turns on. 
Press the engine switch. 
In the event that the engine still cannot be started, contact any autho- 
rized Toyota retailer or Toyota authorized repairer, or any reliable 
repairer.
Starting the engine 
         
        
        
     
        
        Page 460 of 504
4608-2. Steps to take in an emergency
AYGO_OM_Europe_OM99R19E
■Stopping the engine 
Shift the shift lever to N and press the engine switch as you normally do when 
stopping the engine. 
■ Replacing the key battery 
As the above procedure is a temporary measure, it is recommended that the 
electronic key battery be replaced immediately when the battery is depleted.
( P. 383) 
■ Changing engine switch modes 
Release the brake pedal (multi-mode m anual transmission) or clutch pedal 
(manual transmission) and press t he engine switch in step   above. 
The engine does not start and modes will be changed each time the switch is
pressed. ( P. 187) 
■ When the electronic key does not work properly 
● Make sure that the smart entry & start system has not been deactivated in 
the customization setting. If it is off, turn the function on.  
(Customizable features:  P. 485) 
● Check if battery-saving mode is set. If it is set, cancel the function.  
( P. 132) 
         
        
        
     
        
        Page 463 of 504

4638-2. Steps to take in an emergency
8
When trouble arises
AYGO_OM_Europe_OM99R19E 
■ Precautions when the battery is discharged (vehicles with a smart entry 
& start system) 
● In some cases, it may not be possible to unlock the doors using the smart 
entry & start system 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 
reconnected, 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 dis- 
charged, be especially careful when reconnecting the battery. 
■ When replacing the battery 
● Use a battery that conforms to European regulations. 
● Use a battery with the same case size as the previous one;  
vehicles without cold area specifications or a stop & start system: (LN0), 
20 hours rate capacity (20HR) is equiva lent (35Ah) or greater, and perfor- 
mance rating (CCA) is equivalent (300A) or greater;  
vehicles with cold area specifications: (LN0), 20 hours rate capacity (20HR) 
is equivalent (42Ah) or greater, and  performance rating (CCA) is equivalent 
(390A) or greater; or  
vehicles with a stop & start system: (LN2), 20 hours rate capacity (20HR) is 
equivalent (60Ah) or greater, and performance rating (CCA) is equivalent
(540A) or greater. 
• If the sizes differ, the battery cannot be properly secured. 
• If the 20 hour rate capacity is low, even if the time period where the vehi-
cle is not used is a short time, the battery may discharge and the engine 
may not be able to start. 
● For details, consult any authorized Toyota retailer or Toyota authorized 
repairer, or any reliable repairer. 
         
        
        
     
        
        Page 488 of 504

488What to do if... (Troubleshooting)
AYGO_OM_Europe_OM99R19E
What to do if... (Troubleshooting)
●If you lose your keys or mechanical keys, new genuine keys or mechanical 
keys can be made by any authorized Toyota retailer or Toyota authorized 
repairer, or any reliable repairer. ( P.  1 1 2 )
●Vehicles with a smart entry & start system  
If you lose your electronic keys, the risk of vehicle theft increases signifi- 
cantly. Contact any authorized Toyota retailer or Toyota authorized
repairer, or any reliable repairer immediately. ( P. 117)
●Is the key battery weak or depleted? (P. 383)
●Vehicles with a smart entry & start system  
Is the engine switch in IGNITION ON mode?  
When locking the doors, turn the engine switch off. ( P. 187)
●Vehicles with a smart entry & start 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 the radio
wave. ( P. 122, 132)
●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. 121)
If you have a problem, check the following before contacting any 
authorized Toyota retailer or Toyota authorized repairer, or any 
reliable repairer.
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 (5-door models) 
         
        
        
     
        
        Page 489 of 504

489What to do if... (Troubleshooting)
AYGO_OM_Europe_OM99R19E
●Vehicles with a multi-mode manual transmission 
Do you turn the key with the brake pedal depressed firmly? ( P. 182)
●Vehicles with a manual transmission  
Do you turn the key with the clutch pedal depressed firmly? ( P. 182)
●Is the battery discharged? (P. 461)
●Vehicles with a multi-mode manual transmission 
Did you press the engine switch while firmly depressing the brake pedal? 
( P. 185)
●Vehicles with a manual transmission 
Did you press the engine switch while firmly depressing the clutch pedal?
( P. 185)
●Is the electronic key anywhere detectable inside the vehicle? (P. 130)
●Is the steering wheel unlocked? (P. 188)
●Is the electronic key battery weak or depleted?  
In this case, the engine can be started in a temporary way. ( P. 459)
●Is the battery discharged? (P. 461)
●Vehicles without a smart entry & start system  
Is the engine switch in the “ON” position? 
If you cannot release the shift lever by depressing the brake pedal with the 
engine switch in the “ON” position:  P. 457
●Vehicles with a smart entry & start system  
Is the engine switch in IGNITION ON mode? 
If you cannot release the shift lever by depressing the brake pedal with the 
engine switch in IGNITION ON mode:  P. 457
If you think something is wrong 
The engine does not start  
(vehicles without a smart entry & start system) 
The engine does not start  
(vehicles with a smart entry & start system) 
The shift lever cannot be shifted even if you depress the 
brake pedal (vehicles with a multi-mode manual transmis- 
sion) 
         
        
        
     
        
        Page 490 of 504

490What to do if... (Troubleshooting)
AYGO_OM_Europe_OM99R19E
●Vehicles without a smart entry & start system  
It is locked to prevent theft of the vehicle if the key is removed from the 
engine switch. ( P.  1 8 3 )
●Vehicles with a smart entry & start system  
It is locked automatically to prevent theft of the vehicle. ( P. 188)
●The auto power off function will be operated if the vehicle is left in ACCES- 
SORY or IGNITION ON mode (the engine is not operating) for a period of 
time. ( P. 187)
●The seat belt reminder light is flashing  
Are the driver and the passengers wearing the seat belts? ( P. 421)
●The brake system warning light is on  
Is the parking brake released? ( P. 198)
Depending on the situation, other types of warning buzzer may also 
sound. ( P. 417) 
●When a warning light turns on, refer to P. 417.
The steering wheel cannot be turned after the engine is 
stopped 
The engine switch is turned off automatically  
(vehicles with a smart entry & start system) 
A warning buzzer sounds during driving 
A warning light turns on 
         
        
        
     
        
        Page 493 of 504

493Alphabetical index
AYGO_OM_Europe_OM99R19E
Back door ................................. 123 
Back-up lights 
Replacing light bulbs ............. 400
Wattage................................. 482
Battery ...................................... 367
Battery checking ................... 367
If the vehicle battery is  
discharged .......................... 461 
Preparing and checking 
before winter....................... 253
Replacing .............................. 463
Warning light ......................... 417
Bluetooth®*
Audio system ........................ 304 
Hands-free system  
(for cellular phone).............. 306
Bottle holders........................... 337
Brake
Emergency brake signal ....... 247
Fluid ...................................... 480 
Parking brake ........................ 198 
Warning light ......................... 417
Brake assist.............................. 247
Break-in tips ............................  173
Brightness control
Instrument cluster light  
control................................. 106 
Canvas top ............................... 166 
Care................................... 346, 350 
Aluminum wheels.................. 347
Canvas top............................ 346
Exterior ................................. 346
Interior................................... 350
Seat belts .............................. 351 
Chains....................................... 253 
Child restraint system ............... 50
Fixed with a seat belt .............. 60
Fixed with an ISOFIX 
rigid anchor........................... 67
Points to remember ................ 51
Riding with children................. 49 
Types of child restraint system  
installation method ............... 55
Using an anchor bracket ......... 73
Child safety ................................ 49
Airbag precautions .................. 37
Back door precautions .......... 126 
Battery precautions ....... 367, 464 
Canvas top precautions ........ 167
Child restraint system ............. 50
How your child should wear 
the seat belt.......................... 31
Installing child restraints ......... 55 
Power window precautions ... 163 
Rear door child-protectors .... 121
Removed key battery 
precautions......................... 385
Seat belt precautions .............. 32
Seat heater precautions........ 333
BC
*: For vehicles with a multimedia system , refer to “Multimedia owner’s manual”.