2012 Lexus CT200h hybrid battery

511
4-3. Do-it-yourself maintenance
4
Maintenance and care
CT200h_OM_OM76067E_(EE)
Before recharging
When recharging, the 12-volt battery produces hydrogen gas which is flam-
mable and explosive. Therefore, observe the following precautions before
recharging:
If recharging with the 12-volt battery installed on the vehicle, be sure to
disconnect the ground cable.
Make sure the power switch on the charger is off when connecting and
disconnecting the charger cables to the 12-volt battery.
After recharging/reconnecting the 12-volt battery
Unlocking the doors using the smart entry & start system may not be
possible immediately after reconnecting the 12-volt battery. If this hap-
pens, use the wireless remote control or the mechanical key to lock/
unlock the doors.
Start the hybrid system with the “POWER” switch in ACCESSORY
mode. The hybrid system may not start with the “POWER” switch
turned OFF. However, the hybrid system will operate normally from the
second attempt.
The “POWER” switch mode is recorded by the vehicle. If the battery is
reconnected, the vehicle will return the “POWER” switch mode to the
status it was in before the battery was disconnected. Make sure to turn
off the power before disconnect the battery. Take extra care when con-
necting the battery if the “POWER” switch mode prior to discharge is
unknown.
Restart the hybrid system, depress the brake pedal, and confirm that it is
possible to shift into each shift position.
If the system will not start even after multiple attempts at all methods above,
contact any authorized Lexus dealer or repairer, or another duly qualified
and equipped professional.

514
4-3. Do-it-yourself maintenance
CT200h_OM_OM76067E_(EE)
CAUTION
When disconnecting the 12-volt battery
NOTICE
When recharging the 12-volt battery
Never recharge the 12-volt battery while the hybrid system is operating.
Also, be sure all accessories are turned off.
Do not disconnect the negative (-) termi-
nal on the body side as shown. The dis-
connected negative (-) terminal may
touch the positive (+) terminal, which
may cause a short and result in death or
serious injury.

539
4-3. Do-it-yourself maintenance
4
Maintenance and care
CT200h_OM_OM76067E_(EE)
38EFI NO. 210 A
Multiport fuel injection system/
sequential multiport fuel injection
system, exhaust system, key off
pump module, electric cooling
fans
39M-HTR10 AOutside rear view mirror defoggers
40SPARE30 ASpare fuse
41SPARE10 ASpare fuse
42SPARE7.5 ASpare fuse
43EFI MAIN20 A
Multiport fuel injection system/
sequential multiport fuel injection
system, cooling system, EFI NO.2
44BATT FAN10 ABattery cooling fan
45IG220 A
Hybrid system, multiport fuel
injection system/sequential multi-
port fuel injection system, MET,
IGN, power management system
FuseAmpereCircuit

5When trouble arises
561
CT200h_OM_OM76067E_(EE)
5-1. Essential information
Emergency flashers .......... 562
If your vehicle needs to
be towed ......................... 563
If you think something
is wrong ......................... 5705-2. Steps to take in an
emergency
If a warning light turns
on or a warning buzzer
sounds ............................ 571
If a warning message is
displayed ........................ 578
If you have a flat tire
(vehicles with a
spare tire) ....................... 599
If you have a flat tire
(vehicles without a
spare tire) ....................... 613
If the hybrid system will
not start .......................... 627
If you lose your keys ....... 629
If the electronic key does
not operate properly....... 630
If the 12-volt battery
is discharged .................. 633
If your vehicle overheats . 639
If the vehicle becomes
stuck............................... 644
If your vehicle has to be
stopped in an
emergency...................... 646

562
CT200h_OM_OM76067E_(EE)
5-1. Essential information
Emergency flashers
Emergency flashers
If the emergency flashers are used for a long time while the hybrid system is
not operating (while the “READY” indicator is not illuminated), the 12-volt
battery may discharge.
The emergency flashers are used to warn other drivers when the vehi-
cle has to be stopped in the road due to a breakdown, etc.
Press the switch.
All the turn signal lights will
flash. To turn them off, press
the switch once again.

5
563
5-1. Essential information
When trouble arises
CT200h_OM_OM76067E_(EE)
If your vehicle needs to be towed
Before towing
The following may indicate a problem with your hybrid transmis-
sion. Contact any authorized Lexus dealer or repairer, or another
duly qualified and equipped professional before towing.
The hybrid system is operating but the vehicle will not move.
The vehicle makes an abnormal sound.
If there is a malfunction in the P position control system, the smart
entry & start system or the immobilizer system, or if the 12-volt
battery is discharged, the vehicle cannot be towed with the front
wheels on the ground, as the front wheels may be locked. In this
case, transport the vehicle with both front wheels or all four wheels
lifted.
If towing is necessary, we recommend having your vehicle towed by
any authorized Lexus dealer or repairer, or another duly qualified and
equipped professional or a commercial towing service, using a lift-
type truck or flat bed truck.
Use a safety chain system for all towing, and abide by all state/provin-
cial and local laws.

586
5-2. Steps to take in an emergency
CT200h_OM_OM76067E_(EE)
Warning messageDetailsCorrection procedure
Indicates that the hybrid
system has overheated
This message may be
displayed when driv-
ing under severe oper-
ating conditions.
(For example, when
driving up a long steep
hill.)
Stop and check.
(P. 639)
(Flashes)
Indicates that the trac-
tion battery is low
When stopping the
vehicle for a long
period of time, shift the
shift position to P. The
battery cannot be
charged with the shift
position in N.
(Flashes)
Indicates that the trac-
tion battery power has
dropped because a long
period of time has
elapsed after shifting
the shift position to N
Restart the hybrid sys-
tem when starting the
vehicle.
(Flashes)
Indicates that the
driver’s door was
opened with the shift
position in any position
other than P
Shift the shift position
to P.

596
5-2. Steps to take in an emergency
CT200h_OM_OM76067E_(EE)
Interior
buzzerExte-
rior
buzzer
Warning messageDetailsCorrection
procedure

Power was
turned off due to
the automatic
power off func-
tion.
Next time when
starting the
hybrid system,
increase the
engine speed
slightly and
maintain that
level for approx-
imately 5 min-
utes to recharge
the 12-volt bat-
tery.
Once
The electronic
key has a low
battery.Replace the
electronic key
battery. (P.
527)