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Owners Manual_Europe_M62060_en
8-2. Steps to take in an emergency
Starting the fuel cell system when
the 12-volt battery is discharged
The fuel cell system cannot be started
by push-starting.
To prevent 12-volt battery dis-
charge
Turn off the headlights and the audio
system while the fuel cell system is
off.
Turn off any unnecessary electrical
components when the vehicle is run-
ning at a low speed for an extended
period, such as in heavy traffic.
When the 12-volt battery is
removed or discharged
Information stored in the ECU is
cleared. When the 12-volt battery is
depleted, have the vehicle inspected
at any authorized Toyota retailer or
Toyota authorized repairer, or any reli-
able repairer.
Some systems may require initializa-
tion. (P.485)
If the 12-volt battery discharges, it
may not be possible to shift the shift
position to other positions.
In this case, the vehicle cannot be towed
without lifting both rear wheels because
the rear wheels will be locked.
When removing the 12-volt battery
terminals
When the 12-volt battery terminals are
removed, the information stored in the
ECU is cleared. Before removing the 12-
volt battery terminals, contact any
authorized Toyota retailer or Toyota
authorized repairer, or any reliable
repairer as soon as possible.
Charging the 12-volt battery
The electricity stored in the 12-volt bat-
tery 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 vehi-
cle is left for a long time, the 12-volt bat-
tery may discharge, and the fuel cell
system may be unable to start. (The 12-
volt battery recharges automatically
while the fuel cell system is operating.)
When recharging or replacing the
12-volt battery
In some cases, it may not be possible
to unlock the doors using the smart
entry & start system when the 12-volt
battery is discharged. Use the wire-
less remote control or the mechanical
key to lock or unlock the doors.
The fuel cell system may not start on
the first attempt after the 12-volt bat-
tery has recharged but will start nor-
mally after the second attempt. This is
not a malfunction.
The power switch mode is memorized
by the vehicle. When the 12-volt bat-
tery is reconnected, the system will
return to the mode it was in before the
12-volt battery was discharged.
Before disconnecting the 12-volt bat-
tery, 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 reconnecting the 12-volt
battery.
When the 12-volt battery is recon-
nected, start the fuel cell system,
depress the brake pedal, and confirm
that it is possible to shift into each shift
position.
If the battery is removed or the termi-
nals disconnected without operating
the water release function during cold
weather, the vehicle may not start due
to the fuel cell system being frozen. To
prevent this, operate the water
release function before removing the
battery or disconnecting the terminals.
(P.194)
When replacing the 12-volt battery
Use a Central Degassing type 12-volt
battery (European Regulations).
Use a 12-volt battery with the same
case size as the previous 12-volt bat-
tery and an equivalent 20 hour rate
capacity (20HR) or greater.
458


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