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512
Maintenance
12-Volt Battery
Checking the 12-Volt Battery
Check the battery condition monthly. Look at
the test indicator window and check the
terminals for corrosion.
The battery condition is monitored by the
sensor on the negative terminal. If there is a
problem with the sensor, the warning
message on the driver information interface
will let you know. Have your vehicle checked
by an authorized Honda Clarity Plug-In Hybrid
dealer.
If your vehicle’s battery is disconnected or goes dead:
• The audio system is disabled.
2 Reactivating the audio system P. 206
•The clock resets.
2 Clock P. 136
•The vehicle cannot be charged. After reconnecting the batte ry, turn the power
system on, then turn it off.
Confirm that charging is possible.
2 Turning on the Power P. 378
2 Charging P. 458
•
The immobilizer system needs to be reset.
2 Immobilizer System Indicator P. 97
112-Volt Battery
WARNING: Battery post, terminals,
and related accessories contain lead
and lead compounds.
Wash your hands after handling.
The test indicator’s color in formation is on the battery.
When you find corrosion, cl ean the battery terminals
by applying a baking powder and water solution.
Clean the terminals with a damp towel. Cloth/towel
dry the battery. Coat the terminals with grease to
help prevent future corrosion.
3WARNING
The battery gives off explosive hydrogen
gas during normal operation.
A spark or flame can cause the battery to
explode with enough force to kill or
seriously hurt you.
When conducting any battery
maintenance, wear prot ective clothing and
a face shield, or have a skilled technician do
it.
Test Indicator Window
Canadian models only
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513
uu12-Volt Battery uCharging the 12-Volt Battery
Maintenance
Charging the 12-Volt Battery
Disconnect both battery cables to prevent damaging your vehicle’s electrical system.
Always disconnect the negative (–) cable first, and reconnect it last.112-Volt Battery
When replacing the battery, the replacement must be
of the same specifications.
Consult an authorized Honda Clarity Plug-In Hybrid
dealer for more information.
The indicators for the Vehicle Stability Assist
TM (VSA ®)
system, VSA ® OFF, Collision Mitigation Braking
System
TM (CMBSTM), and low tire pressure/Tire
Pressure Monitoring System (TPMS) may come on
along with a message in the driver information
interface when you turn the power system on after
reconnecting the battery.
Drive a short distance at 12 mph (20 km/h). The
indicator should go off. If it does not, have your
vehicle checked by an aut horized Honda Clarity Plug-
In Hybrid dealer.
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524
uuAccessories and Modifications uModifications
Maintenance
Modifications
Do not modify your vehicle in a manner that may affect its handling, stability, or
reliability, or install non-genuine Honda parts or accessories that may have a similar
effect.
Even minor modifications to vehicle systems can affect overall vehicle performance.
Always make sure all equipment is prop erly installed and maintained, and do not
make any modification to your vehicle or its systems that might cause your vehicle
to no longer meet federal, state, prov ince, territory, and local regulations.
The on-board diagnostic port (OBD-II/SAE J1962 connector) installed on this vehicle
is intended to be used with automobile system diagnostic devices or with other
devices that Honda has approved. Use of any other type of device may adversely
affect the vehicle’s electronic systems or allow them to be compromised, possibly
resulting in a system malfunction, drained battery, or other unexpected problems.
Do not modify or attempt to repair your vehicle’s high-voltage hybrid power system
or otherwise modify vehicle electrical systems. Disassembling or modifying electrical
equipment can result in a crash or a fire.
If you ever need to replace your vehicle’s high-voltage battery assembly outside of
warranty coverage, we highly recommend that you only use a genuine Honda high-
voltage battery assembly. Genuine Hond a high-voltage battery assemblies are
designed to work with your vehicle’s hybrid power system and have been designed,
engineered and manufactured to avoid ov ercharging situations. Non-genuine high-
voltage battery assemblies may not have be en similarly designed, engineered and
manufactured, and installation of such assemblies could result in overcharging, fires,
loss of power, or other conditions that may increase the likelihood of a crash or
injury.
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525
Handling the Unexpected
This chapter explains how to handle unexpected troubles.
If a Tire Goes FlatTemporarily Repairi ng a Flat Tire....... 526
Handling of the Jack ......................... 538
Power System Won’t Start Checking the Procedure ................... 539
If the Smart Entry Remote Battery is Weak .......................................... 541
Emergency Power System Off........... 542
Jump Starting .................................... 543
Overheating How to Handle Overheating ............. 546
Indicator, Coming On/Blinking
If the Low Oil Pressure Warning Appears .. 549
If the 12-Volt Battery Charging System Indicator Comes On ....................... 550
If the Malfunction Indicator Lamp Comes
On or Blinks ..................................... 551
If the Brake System Indicator (Red) Comes On or Blinks ....................................... 552
If the Electric Power Steering (EPS) System Indicator Comes On ........................... 553
If the Brake System Indicator (Red) Comes On or Blinks at the Same Time
When the Brake System Indicator
(Amber) Comes On ...................... 554
If the Low Tire Pressure/TPMS Indicator
Comes On or Blinks ....................... 555
If the Transmission System Indicator Blinks
along with the Warning Message .... 556
Fuses Fuse Locations ................................. 557
Inspecting and Changing Fuses ........ 564
Emergency Towing ........................... 565
When You Cannot Unlock the Fuel Fill
Door ................................................. 566
When You Cannot Open the Charge
Lid ................................................. 567
When You Cannot Open the Trunk .. 568
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528
uuIf a Tire Goes Flat uTemporarily Repairing a Flat Tire
Handling the Unexpected
1. Remove the charging cable by releasing the
belt.
2. Pull the strap on the right side of the trunk
and open the lid.
3. Open the fastener and take the kit out of
the trunk.
4. Place the kit face up, on flat ground near
the flat tire, and away from traffic. Do not
place the kit on its side.
Charging Cable
Fastener
Strap
Lid
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539Continued
Handling the Unexpected
Power System Won’t Start
Checking the Procedure
When the READY indicator does not come on and the Ready To Drive message
does not appear on the driver informatio n interface, check the following items and
take appropriate action.
ChecklistConditionWhat to Do
Check if the related
indicator or driver
information interface
messages come on.The Remove Charger Connector message appearsRemoving a charge connector. Set the power
mode to ACCESSORY, then to ON.
The Low Battery Charge . Power Reduced. message appearsCharge the High Voltage battery.
2Charging P. 458
The Temperature Is Too Cold For Vehicle To Operate
message appears.2 Driver Information Interface Warning and
Information Messages P. 103
The To Start, Hold Remote Near Start Button message
appears.
u Make sure the smart entry remote is in its operating range.
2 POWER Button Operating Range P. 158
2If the Smart Entry Remote Battery is Weak
P. 541
The POWER SYSTEM indicator comes on.Have your vehicle checked by an authorized
Honda Clarity Plug-In Hybrid dealer.
The transmission system indicator blinks and Transmission
Problem Apply Parking Brake When Parked message
appears.The power system can be activated as a
temporary measure.
2 If the Transmission System Indicator Blinks
along with the Warning Message P. 556
Check the brightness
of the interior lights. The interior lights are dim or do not come on at
all. Have the 12-volt battery checked by an
authorized Honda Clarity Plug-In Hybrid dealer.
The interior lights come on normally. Check all fuses, or have your vehicle checked by
an authorized Honda Clarity Plug-In Hybrid
dealer.
2 Inspecting and Changing Fuses P. 564
1Checking the Procedure
If you must start the vehi cle immediately, use an
assisting vehicle or booster battery to jump start it.
2 Jump Starting P. 543
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543Continued
Handling the Unexpected
Jump Starting
Turn off the power to electric devices, such as the audio and lights. Turn off the
power system, then open the hood. 1.Open the battery terminal cover.
2. Connect the first jumper cable to your
vehicle’s 12-volt battery + terminal.
3. Connect the other end of the first jumper
cable to the booster battery + terminal.
u If you use a booster battery, only use a
12-volt booster battery.
u When using an automotive battery
charger, select a charging voltage lower
than 15-volts. Chec k the charger manual
for the proper setting.
4. Connect the second jumper cable to the
booster battery - terminal.
■Jump Starting Procedure1Jump Starting
Securely attach the jumper cable clips so that they do
not come off when the power system vibrates. Also
be careful not to tangle the jumper cables or allow
the cable ends to touch each other while attaching or
detaching the jumper cables.
12-volt Battery performa nce degrades in cold
conditions and may prevent the power system from
starting.
3WARNING
A 12-volt battery can explode if you do not
follow the correct procedure, seriously
injuring anyone nearby.
Keep all sparks, open flames, and smoking
materials away from the 12-volt battery.
Battery Terminal Cover
Booster Battery
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550
uuIndicator, Coming On/BlinkinguIf the 12-Volt Battery Charging System Indicator Comes On
Handling the Unexpected
If the 12-Volt Battery Charging System Indicator
Comes On
■Reasons for the indicator to come on
Comes on when the 12-volt battery is not being charged.
■What to do when the indicator comes on
Turn off the climate con trol system, rear defogger, and other electrical
systems, and immediately contact an authorized Honda Clarity Plug-In
Hybrid dealer for repairs.
1 If the 12-Volt Battery Chargi ng System Indicator Comes On
If you need to stop temporarily, do not turn off the
power system. Restarting the power system may
rapidly discharge the battery.
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