649
7-2. Steps to take in an emergency
7
When trouble arises
● The power switch mode is memorized 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 disconnecting
the 12-volt battery, turn the power switch
to 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.
● 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 all wheels because the all
wheels will be locked. (P.607)
■ Replacing the 12-volt battery
● Use a 12-volt battery that conforms to
European regulations.
● Use a 12-volt battery that the case size is
same as the previous one (LN4), 20
hours rate capacity (20HR) is equivalent
(80Ah) or greater, and performance rat-
ing (CCA) is equivalent (685A) or
greater.
• If the sizes differ, the 12-volt battery can-
not be properly secured.
• If the 20 hour rate capacity is low, even if
the time period where the vehicle is not
used is a short time, the 12-volt battery
may discharge and hybrid system may
not be able to start.
• If an improper 12-volt battery is used, 12-
volt battery performance may decrease
and the hybrid system may not be able to
restart.
● Use a Central Degassing type 12-volt
battery (European Regulations).
● Use a 12-volt battery with a handle.
If a 12-volt battery without a handle is
used, removal is more difficult.
● 7-passenger models: Remove the deck
board before removing the 12-volt bat-
tery cover. (P.651)
● After replacing, firmly attach the follow-
ing items to the exhaust hole of the 12-
volt battery.
• Use the exhaust hose that was attached
to the 12-volt battery before replacing
and confirm that it is firmly connected to
the hole section of the vehicle.
• Use the exhaust hole plug included with
the new 12-volt battery or the one
installed on the 12-volt battery prior to
the replacement. (Depending on the new
12-volt battery installed, the exhaust hole
may be plugged.)
Exhaust hole
Exhaust hose
Hole section of the vehicle
● For details, consult your Lexus dealer.
■ When removing the 12-volt battery
terminals
Always remove the negative (-) terminal
first. If the positive (+) terminal contacts
any metal in the surrounding area when
the positive (+) terminal is removed, a
spark may occur, leading to a fire in addi-
tion to electrical shocks and death or
serious injury.
■ Avoiding 12-volt battery fires or
explosions
Observe the following precautions to
prevent accidentally igniting the flamma-
ble gas that may be emitted from the 12-
volt battery:
● Make sure each jumper cable is con-
nected to the correct terminal and that
it is not unintentionally in contact with
any other than the intended terminal.
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