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20
Quick Reference Guide
Ion Exchanger
An ion exchanger is installed in the fluid lines for the fuel cell in order to maintain the 
insulation properties of the fuel cell insulating fluid (FC insulating fluid).
If the message  Service Due Soon A  appears on the driver information interface, ion 
exchange filter replacement is necessary. Be sure to consult an authorized Honda Clarity 
Fuel Cell dealer. 2 Indicators  (P89)
Exhaust Pipe
Water is expelled from the tail pipe while the vehicle is running or while the High Voltage 
battery is being charged. This also happens af ter the vehicle has been running or when you 
shut down the FC system by setting  the power mode to OFF. If you stand to the left rear of 
the vehicle, you may be sprayed by this waste water.
Never drink water expelled from the pipe. Though this water is harmless, it is not suitable 
for drinking. 
While the vehicle is parked during cold temperatures, the FC system may automatically turn 
on and discharge water from the ex haust pipe. If this water is discharged as a vapor, it may 
appear as a white mist. This, however, is not indicative of a problem.
Do not obstruct or block the exhaust pi pe as the FC system may stop working.
Maintenance, Repair, and Disposal
Always consult an authorized Honda Clarity Fuel Cell dealer regarding maintenance, repair, 
and disposal.
Fuel cells and High Voltage batteries that have been removed from disposed vehicles are 
collected through authorized Honda Clarity Fuel Cell dealers. Do not dispose of those 
batteries yourself.
WARNING
Do not directly touch any water emissions 
from the exhaust pipe.
Water created during FC power generation 
is discharged from the exhaust pipe in the 
form of either liquid (water) or gas (steam). 
Directly touching this water may cause 
burns.
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453Continued
Maintenance
Maintenance MinderTM
If the vehicle has maintenance items due within 30 days, you will see the 
Maintenance Minder messages appear on the driver information interface every 
time you set the power mode to ON. The  messages notify you when to bring your 
vehicle to an authorized Honda Clarity Fuel Cell dealer for indicated maintenance 
services.
To Use Maintenance MinderTM
1. Set the power mode to ON.
2. Press the   (display/ information) button.
3. Press the   /   button to select the   icon, and press the  ENTER button.
■Displaying the Maintenance Minder Information1Displaying the Maintena nce Minder Information
Based on the vehicle operati on hours, remaining ion 
exchanger life is calculated.
There is a list of maintenance service items you can 
view on the driver in formation interface.
2 Maintenance Service Items  P. 455
 /   Button
Maintenance Item Code(s)
 Button
ENTER  Button
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454
uuMaintenance MinderTMuTo Use Maintenance MinderTM
Maintenance
The system message indicator ( ) comes on al ong with the Maintenance Minder message.
*1 : The power system indicator comes on when  an ion exchanger replacement is past due.
*2 : The messages appear alternately when  an ion exchanger replacement is past due.
■Indicator, Warning Message and Maintenance Minder 
Information on the Driver Information Interface
IndicatorWarning MessageMaintenance Minder 
InformationExplanationInformation
—
Service Due SoonOne or more of the service 
items are required in less than 
30 days. Press the   button 
to switch to another display.The remaining days will 
be counted down per 
day.
—
Service Due NowOne or more of the service 
items are required in less than 
10 days. Press the   button 
to switch to another display.Have the indicated 
service performed as 
soon as possible.
Service Past DueThe indicated maintenance 
service is still not done after the 
remaining time reaches 0. Press 
the   button to switch to 
another display.Your vehicle has passed 
the service required 
point.
Immediately have the 
service performed and 
make sure to reset the 
Maintenance Minder
TM.*1
—*2
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uuMaintenance MinderTMuTo Use Maintenance MinderTM
456
Maintenance
Reset the maintenance minder informat ion display if you have performed the 
maintenance service.
Have an authorized Honda Clarity Fuel Ce ll dealer reset the maintenance item code 
for ion exchanger replacement as it is not possible to do this on your own.
1. Set the power mode to ON.
2. Press the   (display/information) button.
3. Press the   /   button to sele ct the   icon, and press the ENTER button.
4. Press and hold the  ENTER button for about 10 seconds  to enter the reset mode.
5. Press   /   to select a maintenance item to reset, or to select  All Due Items 
(You can also select  Cancel to end the process).
6. Press the  ENTER button to reset the selected item.
7. Repeat from step 4 for other items you wish to reset.
■Resetting the Display1Resetting the Display
NOTICE
Failure to reset the Maintenance MinderTM display 
after a maintenance servic e results in the system 
showing incorrect maintenance intervals, which can 
lead to serious mechanical problems.
The authorized Honda Clarity Fuel Cell dealer will 
reset the Maintenance Minder
TM display after 
completing the required ma intenance service. If 
someone other than an authorized Honda Clarity 
Fuel Cell dealer performs  maintenance service, reset 
the Maintenance Minder
TM display yourself.
You can also reset the Maintenance Minder
TM display 
using the audio/information touch screen. 2 Customized Features  P. 300
 /   /   /   
Button34
ENTER  Button
 Button
34
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