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13
Quick Reference Guide
Auto Engine Stop/Start
The car will select the appropriate source of power depending on the drive mode you select.
As a result, the engine will automatically start or stop as needed  to either charge the battery or provide supplemental power.
Under certain circumstances, the engine may turn on or, if it is already on, it may not turn off.
● You are going uphill or accelerating aggressively.
● The climate control system is in heavy use.
● The Ambient temperature is too hot or too cold.
● The High Voltage Battery state of charge is very low.
● The vehicle is running a system check.
System Check
When the engine initially  starts (between the time the  POWER button is turned on and turned of f), the vehicle conducts a system check.
● While the check is being conducted, the engine may periodically turn on and off. This, however, is normal.
● The curved blue line in the  POWER/CHARGE Gauge will not appear during the system check ( EV indicator may still turn on).
● Once the engine starts, it will continue to run until the system reaches operating temperature.
The curved blue line in the  POWER/CHARGE Gauge will reappear once the system check is completed.
2 POWER/CHARGE Gauge  (P122)
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Quick Reference Guide
Energy Efficiency
As with a gasoline powered vehicle, the fuel efficiency and the range of this vehicle is most impacted by the driver’s driving style. Aggressive 
acceleration and high-speed driving can easily trigger the system  to switch the propulsion source to the gasoline-powered engin e. Climate 
control system usage also has a str ong impact with heavy usage negatively affecting the vehicle’s range.
Battery Type
There are two types of batteries used in this vehicle, a standa rd 12-volt battery that powers the airbags, the interior and exterior lights, and 
other standard 12-volt systems, and a high voltage battery that  is used to power the propulsion motor and recharge the 12-volt  battery.
Hybrid Vehicles
High voltage parts and high voltag e wires in this vehicle are sheathed in electromagnetic shielding material; therefore, the am ount of 
electromagnetic waves emitted is no more gr eater than those emitted by household appliances or the  electrical parts in conventional 
vehicles.
Sounds Unique to the Honda Plug-In System
When you first start driving this vehicle, you likely will hear  some unfamiliar sounds, particularly when you first turn on the power system, 
while driving, and just after parking. Some of these sounds are  unique to this vehicle‘s powertrain, fuel, and climate control systems; others 
are similar to sounds generated by conventional automobiles that typically are masked by louder noises absent from a vehicle of  this design. 
These sounds are not a cause for concern, and you will soon recognize them as normal and thus be able to detect any new or unus ual noise 
should one develop.
After shutting off the engi ne, you may hear certain noises coming from the vehicle. Here’s the lowdown:
● Noise from Under Vehicle:  This noise is caused by the vacuum pump inside the fuel evaporation leakage check module (ELCM). 
Depending on conditions, the pump will come on for about  15 minutes about 5 to 10 hours  after engine shutoff. This noise is just normal 
vehicle operation and don’t indicate a vehicle problem.
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Quick Reference Guide
Safe Driving (P 41)
Airbags (P 54)
● Your vehicle is fitted with ai rbags to help protect you and 
your passengers during a moderate-to-severe collision.
Child Safety (P 69)
● All children 12 and younger should be seated in the rear seat.
● Smaller children should be properly restra ined in a forward-facing child seat.
● Infants must be properly restraine d in a rear-facing child seat.
Before Driving Checklist (P 46)
● Before driving, check that the  front seats, head restraints, 
steering wheel, and mirrors have been properly adjusted.
Seat Belts (P 47)
● Fasten your seat belt and sit upright well 
back in the seat.
● Check that your passengers are wearing 
their seat belts correctly.
Fasten your lap belt as 
low as possible.
Exhaust Gas Hazard (P 82)
● Your vehicle emits dangerous exhaust gases that contain 
carbon monoxide. Do not run the engine in confined 
spaces where carbon monoxide gas can accumulate.
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Quick Reference Guide
Maintenance (P 473)
Under the Hood (P 482)
● Check engine oil, coolants and windshield washer fluid. Add 
when necessary.
● Check brake fluid.
● Check the 12-volt battery condition monthly.
aPull the hood release handle under the corner of the 
dashboard.
bLocate the hood latch lever,  push it to the side, and then 
raise the hood. Once you have raised the hood slightly, you 
can release the lever.
cWhen finished, close the hood  and make sure it is firmly 
locked in place.
Lights (P 496)
● Inspect all lights regularly.
Wiper Blades (P 498)
● Replace blades if they leave streaks 
across the windshield.
Tires (P 501)
● Inspect tires and  wheels regularly.
● Check tire pressures regularly.
● Install snow tires for winter driving.
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Quick Reference Guide
Why doesn’t the curved 
blue line in the meter 
appear even when the EV 
indicator is on?The vehicle is performing a system check.
2Auto Engine Stop/Start  (P13)
Why does the beeper 
sound when I start driving?The beeper sounds when the driver and/or front passenger are 
not wearing their seat belts.
Why does a beeper sound 
when I walk away from the 
vehicle after I close the 
door?The beeper sounds if you move outside the walk away auto lock 
operating range before the door completely closes.
2Locking the doors and trunk (Walk away auto lock ®)  (P 140)
Pressing the electric 
parking brake switch does 
not release the parking 
brake. Why?Press the electric parking brake  switch with the brake pedal 
depressed.
Depressing the accelerator 
pedal does not release the 
parking brake 
automatically. Why?●Fasten the driver’s seat belt.
●Check if the transmission is in (P or (N. If so, select any other 
position.
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uuIndicators u
Instrument Panel
IndicatorNameOn/BlinkingExplanationMessage
READY Indicator
●Comes on when the vehicle is 
ready to drive.●May go off if the  POWER SYSTEM  or 
transmission system indicator comes on.
2 Turning on the Power  P. 378
Malfunction 
Indicator Lamp
●Comes on when you set the power 
mode to ON, and goes off either 
when the power system is on or 
after several seconds if the vehicle 
did not start. If “readiness codes” 
have not been set, it blinks five 
times before it goes off.
●Comes on if there is a problem 
with the emissions control system.
●Blinks when a misfire in the 
engine's cylinders is detected.
●Readiness codes are part of the on board 
diagnostics for the emissions control 
systems.
2 Testing of Readiness Codes  P. 573●Comes on while driving - Have your 
vehicle checked by an  authorized Honda 
Clarity Plug-In Hybrid dealer.
●Blinks while driving  - Stop in a safe 
place where there are no flammable 
objects. Stop the power system for 10 
minutes or more, and wait for the engine 
to cool down. Then, t ake the vehicle to an 
authorized Honda Clarity Plug-In Hybrid 
dealer.
2 If the Malfunction Indicator Lamp 
Comes On or Blinks P. 549
12-Volt Battery 
Charging System 
Indicator
●Comes on when you set the power 
mode to ON, and  goes off when 
the power system is on.
●Comes on when the 12-volt 
battery is not charging.
●Comes on while driving  - Turn off the 
climate control system and rear defogger 
in order to reduce electricity 
consumption.
2 If the 12-Volt Battery Charging 
System Indicator Comes On  P. 548
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92
uuIndicators u
Instrument Panel
IndicatorNameOn/BlinkingExplanationMessage
Transmission 
System Indicator
●All the gear positions may light for 
several seconds, and go off.●When all the gear positions illuminate, 
immediately stop your vehicle in a safe 
place.
●Indicators go off if there is no problem. 
However, even if they go off, take your 
vehicle to an authorized Honda Clarity 
Plug-In Hybrid dealer for inspection.
●The indicated current gear 
selection blinks if there is a 
problem with the transmission 
system.●Avoid sudden start and acceleration, and 
stop in a safe place immediately.
●Have your vehicle checked by an 
authorized Honda Clarity Plug-In Hybrid 
dealer.
●The indicated current gear 
selection or all the gear positions 
blink if you cannot select 
(P due 
to a transmission system failure.
●The engine can be activated as a 
temporary measure.
2 If the Transmission System Indicator 
Blinks along with the Warning 
Message  P. 554
●Set the parking brake when parking.●Have your vehicle checked by an 
authorized Honda Clarity Plug-In Hybrid 
dealer immediately.
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104
uuIndicators uDriver Information Interface Wa rning and Information Messages
Instrument Panel
MessageConditionExplanation
●Appears when there is a problem with the sensor on 
the 12-volt battery.●Have your vehicle checked by an authorized Honda 
Clarity Plug-In Hybrid dealer.
2 Checking the 12-Volt Battery  P. 510
●Appears along with the battery charging system 
indicator when the battery is not charging.●Turn off the climate control system and rear defogger to 
reduce electricity consumption.
2If the 12-Volt Battery Charging System Indicator 
Comes On  P. 548
●Appears when the engine  oil pressure is low.●Appears while driving - Immediately stop in a safe 
place.
2If the Low Oil Pressure Warning Appears  P. 547
●Appears when the engine coolant temperature gets 
abnormally high.
2Overheating  P. 544
●Appears when the engine coolant temperature is 
near its upper limit.●Drive slowly to prevent overheating.
●Appears if there is a pr oblem with the cooling 
system.●Drive slowly to prevent ov erheating and have your 
vehicle checked by an author ized Honda Clarity Plug-In 
Hybrid dealer as soon as possible.
●Appears when the fuel fill cap is loose or is not 
installed.
2 Tighten Fuel Cap Message  P. 549
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