2004 HONDA CIVIC HYBRID coolant temperature

If the IMA battery is too hot or too
cold, the IMA system shuts down to
protect the battery. This disables the
IMA assist and Auto Idle Stop, even
though the Battery Level Gauge may
show that the battery is well-charged.
Theref ore, those f unctions may not
operate when you f irst start driving
in very hot or cold weather.This shows the temperature of the
engine’s coolant. During normal
operation, the reading should be in
the middle of the gauge. In severe
driving conditions, the reading may
reach near the red mark. If it
reaches the red (Hot) mark, pull
safely to the side of the road. Turn to
page f or instructions and
precautions on checking the engine’s
cooling system.
The battery temperature will
normalize af ter a f ew minutes of
driving, and the IMA system will
work normally.
This gauge shows you the status of
the Integrated Motor Assist (IMA).
When the IMA battery is being
charged, the lef t side of the gauge
illuminates. When the IMA is
assisting the engine, the right side of
the gauge illuminates. 187
Charge/Assist Gauge
Temperature Gauge
Gauges
Inst rument s and Cont rols63
IMA CHARGE
GAUGEIMA ASSIST
GAUGE

If the interior is very warm,you can
cool it down more rapidly by partially
opening the windows, turning on the
A/C, and setting the fan to
maximum speed in Fresh Air mode.
In AUTO mode, the system controls
the air f low direction automatically
between the dashboard vents and
the f loor vents.
The f low-through ventilation system
draws in outside air, circulates it
through the interior, then exhausts it
through vents near the rear side
panels.
Turn the temperature control dial
all the way to the lef t.
Make sure the A/C is of f .
Select and Fresh Air mode.
Set the f an to the desired speed.
The heater uses engine coolant to
warm the air. If the engine is cold, it
will be several minutes bef ore you
f eel warm air coming through the
system. Turn on the A/C by pressing the
button. The light in the button
comesonwhenafanspeedis
selected.
Make sure the temperature
control dial is all the way to the left.
Select .
If the outside air is humid, select
Recirculation mode. If the outside
air is dry, select Fresh Air mode.
Set the f an to the desired speed.
Air conditioning places an extra load
on the engine. Watch the engine
coolant temperature gauge (see page
). If it moves near the red zone,
turn of f the A/C until the gauge
reads normally. Select and Fresh Air mode.
Set the f an to the desired speed.
Adjust the warmth of the air with
the temperature control dial.
1.
2.
3.
4. 1.
2.
3.
4.
5. 2.
3. 1.
63
Ventilation
Using the Heater Using the A /C
Comf ort and Convenience Feat ures
Vents, Heating, and A/C
91

To maximize f uel economy, your
Civic Hybrid has an Auto Idle Stop
f unction. Under certain conditions,
the engine will shut of f when you
come to a stop. Those conditions are:The engine coolant is nearly up to
normal operating temperature.
The vehicle’s speed is below 19
mph (30 km/h) and you are
pressing on the brake pedal to
come to a stop.
You depress the clutch pedal.
You are not pressing on the
accelerator pedal.
The IMA battery is charged
enough to operate the system. The Auto Idle Stop f unction may not
activate if the IMA battery
temperature is too hot or too cold. During Auto Idle Stop, the IMA
charge and power brake vacuum
reserve is monitored by the system.
If either drops below a desired level,
and the shif t lever is in Neutral, the
engine will restart so it can recharge
the IMA battery or replenish the
vacuum supply.
The ECON mode is selected, and
the outside temperature is above
f reezing, or the f an speed control
dial is off (see page ).
There is adequate vacuum reserve
f or the power brakes.
When these conditions are met, the
engine will shut of f as you come to a
stop. It will start again automatically
when you depress the clutch pedal
f ully and move the shif t lever to f irst
gear. There is no need to start the
engine with the ignition switch.
It is recommended that you move
the shift lever to Neutral and remove
your f oot f rom the clutch pedal while
you are stopped. Sitting with the
clutch pedal depressed and the shif t
lever in gear will cause the engine to
continue running, def eating the f uel
economy benef its of the Auto Idle
Stop f unction. 89
5-speed Manual T ransmission
Auto Idle Stop
Driving131

To maximize f uel economy, your
Civic Hybrid has an Auto Idle Stop
f unction. Under certain conditions,
the engine will shut of f when you
come to a stop. Those conditions are:The engine coolant is nearly up to
normal operating temperature.
The shift lever is in D or N.
You are not pressing on the
accelerator pedal.
The IMA battery is charged
enough to operate the system.
The ECON mode is selected, and
the outside temperature is above
f reezing, or the f an speed control
dial is off (see page ). There is adequate vacuum reserve
f or the power brakes.
When these conditions are met af ter
the vehicle speed has exceeded 10
mph (16 km/h), the engine will shut
of f as you are braking to a stop and
the vehicle speed goes below 5 mph
(8 km/h).
The engine will start again when you
release the brake pedal. It will also
restart, even if you are still pressing
the brake pedal, under these
conditions: You move the shif t lever f rom D
or N to R or L.
You are on an incline, and the
vehicle begins rolling. During Auto Idle Stop, the IMA
charge and power brake vacuum
reserve is monitored by the system.
If the vacuum reserve drops below
an optimal level, the engine will
restart to replenish the vacuum
supply. If the IMA charge drops
below an optimal level and the shif t
lever is in Neutral or Park (P), the
engine will restart to recharge the
IMA battery.
The Auto Idle Stop f unction may not
activate if the IMA battery
temperature is too hot or too cold.
You press the accelerator pedal.
89
Auto Idle Stop
Automatic Transmission (CVT)
Driving137

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Follow the Severe Maintenance
Schedule if you drive your vehicle
MAINLY under one or more of the
f ollowing conditions:
Driving less than 5 miles (8 km) per
trip or, in f reezing temperatures,
driving less than 10 miles (16 km)
per trip.
Driving in extremely hot [over 90°F
(32°C)] conditions.
Extensive idling or long periods of
stop and go driving, such as a taxi or
a commercial delivery vehicle.
Driving with a roof rack, or driving
in mountainous conditions.
Driving on muddy, dusty, or de-iced
roads. Follow the
Maintenance Schedule f or Severe
Conditions.
Maint enance Canadian Owners
148
miles x 1,000
km x 1,000
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10
16 20
32 40
6450
80 70
112 80
128 100
160
Check oil and coolant at each fuel stop 130
208
140
224
Service the items listed at the indicated distance (or time, if given).
Every 10,000 miles (16,000 km)
Check inflation and condition once a month
Every 5,000 miles (8,000 km) or every 6 months, whichever comes first
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At 120,000 miles (192,000 km) or 10 years, then every
60,000 miles (96,000 km) or 5 years
Every 3 years (independent of mileage) Every 15,000 miles (24,000 km)
Check engine oil and coolant
Check tires
Replace engine oil
Rotate tires (follow pattern on page
172)
Replace engine oil filter
Check front and rear brake wear
Lubricate all hinges, locks and latches
Inspect the following items: Tie rod ends, steering gear box, and boots
Suspension components, Driveshaft boots
Check parking brake adjustment
Inspect the following items: Brake hoses and lines (including ABS)
All fluid levels and condition of fluids
Exhaust system , Fuel lines and connections
Lights and controls/vehicle underbody
Inspect and adjust drive belts
Replace dust and pollen filter
Replace air cleaner element
Replace spark plugs
Inspect valve clearance
Replace CVT fluid
Replace manual transmission fluid
Inspect idle speed
Inspect idle speed
Replace engine coolant
Replace brake fluid
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30
48 60
9690
144 110
176120
192 150
240
Every 160,000 miles (256,000 km) See dust and pollen filter on page for
replacement information under special
driving conditions.
Use normal schedule except in dusty
condition.
See information on maintenance and
emission warranty on page .
1:
2:
3:
: For ULEV model
4 : For AT-PZEV model
146167
1
3
4 2
Maintenance Schedule for Severe Conditions

Saf ely pull to the side of the road.
Put the transmission in Neutral or
Park, and set the parking brake.
Turn of f all the accessories, and
turn on the hazard indicator.
If you see steam and/or spray
coming f rom under the hood, turn
of f the engine. Wait until you see
no more signs of steam or spray,
then open the hood.If you do not see steam or spray,
leave the engine running and
watch the temperature gauge. If
the high heat is due to overloading,
the engine should start to cool
down almost immediately. If it
does, wait until the temperature
gauge comes down to the midpoint,
then continue driving.
If the temperature gauge stays at
the red mark, turn of f the engine.Look f or any obvious coolant leaks,
such as a split radiator hose.
Everything is still extremely hot,
so use caution. If you f ind a leak, it
must be repaired bef ore you
continue driving (see
on page ).
If you don’t f ind an obvious leak,
check the coolant level in the
radiator reserve tank. Add coolant
if the level is below the MIN mark.
1.
2.
3.
4.5.
6.
199
If theEngineOverheats
T aking Care of t he Unexpect ed
Emergency
Towing
188

Using gloves or a large heavy
cloth, turn the radiator cap
counterclockwise without pushing
down to the first stop. After the
pressure releases, push down on
the cap, and turn it until it comes
off.
Start the engine, and set the
temperature control dial to
maximum. Add coolant to the
radiator up to the base of the f iller
neck. If you do not have the
proper coolant mixture available,
you can add plain water.
Remember to have the cooling
system drained and ref illed with
the proper mixture as soon as you
can.Put the radiator cap back on
tightly. Run the engine and watch
the temperature gauge. If it goes
back to the red mark, the engine
needs repair (see
on page ).
If the temperature stays normal,
check the coolant level in the
radiator reserve tank. If it has
gone down, add coolant to the
MAX mark. Put the cap back on
tightly.
If there was no coolant in the
reserve tank, you may need to add
coolant to the radiator. Let the
engine cool down until the reading
reaches the middle of the
temperature gauge, or lower,
bef ore checking the radiator.
8.
9. 10.
11.
7.
199
If theEngineOverheats
T aking Care of t he Unexpect ed
Emergency
Towing
189
Removing the radiator cap
while the engine is hot can
cause the coolant to spray out,
seriously scalding you.
Always let the engine and
radiator cool down before
removing the radiator cap.

Î
............................
Capacities Chart .204
.............
Carbon Monoxide Hazard . 46
.............................
Carrying Cargo .123
Cassette Player ............................................
Care .106
...................................
Operation .105
..............
CAUTION, Explanation of . ii
.........................................
CD Care .101
...................................
CD Changer .100
.......
CD Changer Error Message . 103
.......................
CD Error Message .102
.........................................
CD Player .99
....................................
Ceiling Light .83
........................
Certif ication Label .202
............................................
Chains .174
....................
Changing a Flat Tire .179
Changing Oil ........................................
How to .153
......................................
When to .147
...
Charging System Indicator . 54,191
............
Checklist, Bef ore Driving . 128
.....................................
Child Saf ety .29
..............................
Booster Seats .43
...................................
Child Seats .29 .....
Important Saf ety Reminders . 29
..........................................
Inf ants .34
............................
Large Children .42
.........................................
LATCH .38
...........................
Lower Anchors .37
.....................
Risks With Airbags .30
.............................
Small Children .35
.........................................
Tethers .41
........
Where Should A Child Sit? . 30
..................
Childproof Door Locks . 73
.........................
Clock, Setting the .108
...................................
Clutch Fluid .160
........................
CO in the Exhaust .208
............
Cold Weather, Starting in . 129
..............................
Compact Spare .178
...............
Consumer Inf ormation . 214
.............
Controls, Instruments and . 49
Coolant ........................................
Adding .155
....................................
Checking .118
.........................
Proper Solution .155
...................
Temperature Gauge . 63
Crankcase Emissions Control ........................................
System .209
................
Cruise Control Indicator . 56............
Cruise Control Operation . 109
................
Cup (Beverage) Holders . 85
..........
Customer Relations Of f ice . 216
................
DANGER, Explanation of . ii
...................................
Dashboard .2, 50
................
Daytime Running Lights . 66
Daytime Running Lights .......................................
Indicator .66
.................................
Dead Battery .186
............
Def ects, Reporting Saf ety . 216
..........................
Def og and Def rost .93
................
Def ogger, Rear Window . 68
................
Def rosting the Windows . 93
....................................
Dimensions .204
...............
Dimming the Headlights . 66
Dipstick ..........
Automatic Transmission . 158
..................................
Engine Oil .118
..........................
Directional Signals .66
........
Disc Brake Wear Indicators . 140
.....................
Disposal of Used Oil .155
Doors ..............
Locking and Unlocking . 73
Index
C
D
II