5017-2. Steps to take in an emergency
7
When trouble arises
HIGHLANDER HV_U
■Starting the hybrid system 
when the 12-volt battery is dis-
charged
The hybrid system cannot be started 
by push-starting.
■To prevent 12-volt battery dis-
charge
●Turn off the headlights and the 
audio system while the hybrid sys-
tem is off.
●Turn off any unnecessary electri-
cal components when the vehicle 
is running at a low speed for an 
extended period, such as in heavy 
traffic.
■When the 12-volt battery is 
removed or discharged
●Information stor ed in the ECU is 
cleared. When the 12-volt battery 
is depleted, have the vehicle 
inspected at you r Toyota dealer.
●Some systems may  require initial-
ization. ( P.542)
■When removing the 12-volt bat-
tery terminals
When the 12-volt battery terminals 
are removed, the information stored 
in the ECU is cleared. Before 
removing the 12-volt battery termi-
nals, contact your Toyota dealer.
■Charging the 1 2-volt battery
The electricity stor ed in the 12-volt 
battery will discharge gradually even 
when the vehicle is not in use, due 
to natural discharge and the drain-
ing effects of certain electrical appli-
ances. If the vehicle is left for a long 
time, the 12-volt battery may dis-
charge, and the hybrid system may 
be unable to start. (The 12-volt bat-
tery recharges aut omatically while 
the hybrid system is operating.)
■When recharging or replacing 
the 12-volt battery
●In some cases, i t may not be pos-
sible to unlock the doors using the 
smart key system when the  12-volt battery is
 discharged. Use 
the wireless remote  control or the 
mechanical key to lock or unlock 
the doors.
●The hybrid syste m may not start 
on the first attempt after the 
12-volt battery has recharged but 
will start normally after the second 
attempt. This is not a malfunction.
●The power switch mode is memo-
rized by the vehicle. When the 
12-volt battery is reconnected, the 
system will return to the mode it 
was in before the 12-volt battery 
was discharged. Before discon-
necting the 12-volt battery, turn 
the power switch off.
If you are unsure what mode the 
power switch was in before the 
12-volt battery discharged, be 
especially careful when recon-
necting the 12-volt battery.
●The power back door must be ini-
tialized. ( P.142)
■When replacing t he 12-volt bat-
tery
●Use a Central  Degassing type 
12-volt battery (European Regula-
tions).
●Use a 12-volt battery that the case 
size is same as the previous one 
(LN2), 20 hour rate capacity 
(20HR) is equivalent (55Ah) or 
greater, and per formance rating 
(CCA) is equivalent (345A) or 
greater.
• If the sizes differ, the 12-volt bat- tery cannot be properly secured.
• If the 20 hour rate  capacity is low, 
even if the time p eriod where the 
vehicle is not used is a short time, 
the 12-volt battery may discharge 
and the hybrid system may not be 
able to start.
●Use a 12-volt battery with a han-
dle. If a 12-volt battery without a 
handle is used, removal is more 
difficult.
●After replacing, firmly attach the 
following items to the exhaust hole 
of the 12-volt battery. 
561Alphabetical Index
HIGHLANDER HV_UCruise control
Dynamic radar cruise control with full-speed range .......... 271
Cup holders ............................ 367
Current fuel consumption94, 102
Curtain shield airbags ............. 34
Customizable features ........... 530
D
Daytime running light system229 Replacing light bulbs ............ 449
Defogger Outside rear view mirrors ... 344, 348
Rear window ................ 344, 348
Windshield.................... 344, 347
Differential Rear differential oil ............... 514
Digital Rearview Mirror .......... 167
Dimension ............................... 510
Dinghy towing ........................ 212
Display Dynamic radar cruise control with full-speed range .......... 271
Energy monitor ..................... 117
Head-up display ................... 112
Intuitive parking assist .......... 292
LTA (Lane Tracing Assist) ..... 266
Multi-informatio n display 92, 101
RCTA .................................... 300
Toyota Multi-operation touch 340
Warning message ................ 476
Distance until next engine oil  change..................................... 91
Do-it-yourself maintenance ... 407
Door courtesy lights .............. 362
Door lock Back door ............................. 135
Side doors ............................ 131
Smart key system................. 146
Wireless remote control ....... 129 Doors
Automatic door locking and unlocking system ................134
Back door .............................135
Door glasses ........................179
Door lock ..............................135
Open door warning buzzer .132,  134
Outside rear view mirrors .....177
Rear door child-protectors ....134
Drive distance ...................96, 106
Drive information ..............96, 106
Driver’s seat position memory Driving position memory .......159
Memory recall function .........161
Drive-start control ..................191
Driving Break-in tips .........................191
Correct driving posture ...........25
Driving mode select switch ...322
Hybrid vehicle dri ving tips .....331
Procedures ...........................190
Winter drive tips....................333
Driving informatio n display ...93, 
102
Driving mode select switch ...322
Driving position memory .......159 Memory recall function .........161
Driving range ....................94, 102
Driving support system informa- tion display......................96, 105
Dynamic radar cruise control  with full-speed range............271Warning message.................281
E
ECB (Electronically Controlled  Brake System).......................325
ECO Accelerator Guidance....94,  103
Eco drive mode .......................322
Eco score ..........................94, 103