2005 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.
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. 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, such as very hot
weather or a long period of uphill
driving, the reading may reach near
the red mark. If it reaches the red
(Hot) mark, pull saf ely to the side of
theroad.Seepage for
instructions and precautions on
checking the engine’s cooling
system.
186
Charge/Assist Gauge
Temperature Gauge
Gauges
Inst rument s and Cont rols
63
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 airf 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 window.
Set the temperature to the lower
limit.
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. Select .
The system automatically
switches to Fresh Air mode.
Set the f an to the desired speed.
Adjust the warmth of the air with
the temperature control dial.
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.
Turn on the A/C by pressing the
button. The indicator in the button
comesonwhenafanspeedis
selected.
Make sure the temperature is set
to maximum cool.
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.
1.
2.
3.
4.
1.
2.
3.
4.
5.63
1.
2.
3.
Ventilation
Using the Heater Using the A /C
Vents, Heating, and A/C
Features
89

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. 87
Auto Idle Stop
Manual T ransmission
Driving
129

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.
87
Auto Idle Stop
Automatic Transmission (CVT)
Driving
135

If the vehicle overheats, you should
take immediate action. The only
indicationmaybethetemperature
gauge climbing to or above the red
mark. Or you may see steam or
spray coming f rom under 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 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. 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 accessories, and turn
on the hazard warning lights.
The reading on the vehicle’s
temperature gauge should stay in
the midrange. If it climbs to the red
mark, you should determine the
reason (hot day, driving up a steep
hill, etc.).
1.
2.3.
4.
5.
197
If theEngineOverheats
Emergency
Towing
186
Steam and spray from an
overheated engine can
seriously scald you.
Do not open the hood if steam
is coming out.
Driving with the temperature gauge
reading at the red mark can cause
serious damage to the engine.

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 you do not f ind an obvious leak,
check the coolant level in the
radiator reserve tank. Add coolant
if the level is below the MIN mark.
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.
Using gloves or a large heavy
cloth, turn the radiator cap
counterclockwise, without pushing
down, to the f irst stop. Af ter 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 heat. 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 ).
8.
9. 10.
11.
7. 6.
197
If theEngineOverheats
Emergency
Towing
T aking Care of t he Unexpect ed
187
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
Bulb Replacement....................
Turn Signal Lights . 160
..............................
Bulbs, Halogen .159
............................
Capacities Chart .202
.............
Carbon Monoxide Hazard . 45
.............................
Carrying Cargo .121
Cassette Player ............................................
Care .105
...................................
Operation .103
..............
CAUTION, Explanation of . ii
.........................................
CD Care .100
.....................................
CD Changer .99
.....
CD Changer Error Messages . 102
.........
CD Player Error Messages . 101
.........................................
CD Player .98
....................................
Ceiling Light .84
........................
Certif ication Label .200
............................................
Chains .172
....................
Changing a Flat Tire .177
Changing Oil ........................................
How to .151
......................................
When to .145
...
Charging System Indicator . 54,189 ............
Checklist, Bef ore Driving . 126
.....................................
Child Saf ety .27
..............................
Booster Seats .42
...................................
Child Seats .34
.....
Important Saf ety Reminders . 27
..........................................
Inf ants .32
............................
Large Children .41
.........................................
LATCH .36
...........................
Lower Anchors .36
......................
Risks with Airbags .28
.............................
Small Children .33
.........................................
Tethers .40
.........
Where Should a Child Sit? . 28
..................
Childproof Door Locks . 73
.........................
Clock, Setting the .107
...................................
Clutch Fluid .158
........................
CO in the Exhaust .207
............
Cold Weather, Starting in . 127
..............................
Compact Spare .176
...............
Consumer Inf ormation . 212
.............
Controls, Instruments and . 49
Coolant ........................................
Adding .153
....................................
Checking .116
.........................
Proper Solution .153
...................
Temperature Gauge . 63Crankcase Emissions Control
........................................
System .207
................
Cruise Control Indicator . 56
............
Cruise Control Operation . 108
.................
Cup (Beverage) Holder . 83
..........
Customer Relations Of f ice . 212
................
DANGER, Explanation of . ii
...................................
Dashboard .3, 50
................
Daytime Running Lights . 66
Daytime Running Lights .......................................
Indicator .57
.................................
Dead Battery .184
............
Def ects, Reporting Saf ety . 214
..........................
Def og and Def rost .90
................
Def ogger, Rear Window . 68
................
Def rosting the Windows . 90
....................................
Dimensions .202
...............
Dimming the Headlights . 66
Dipstick ..........
Automatic Transmission . 156
..................................
Engine Oil .116
..........................
Directional Signals .66
........
Disc Brake Wear Indicators . 138
Index
C
D
II

CONT INUED
.....................
Disposal of Used Oil .153
Doors ..............
Locking and Unlocking . 73
......................
Power Door Locks .73
..........
DOT Tire Quality Grading . 204
Downshif ting, Manual .............................
Transmission .128
...........
Driver and Passenger Safety . 5
...........................................
Driving .127
....................................
Economy .117
..................
Dust and Pollen Filter . 165
..............................
Economy, Fuel .117
......
Electric Power Steering (EPS) . 55
..................................
Emergencies .175
............................
Jump Starting .184
.......................................
Towing .197
.............
Hazard Warning Button . 67
.............
Battery, Jump Starting . 184
...........
Brake System Indicator . 191
................
Changing a Flat Tire . 177
.....
Charging System Indicator . 189
..................
Checking the Fuses . 192
.....
Low Oil Pressure Indicator . 188 ...
Malf unction Indicator Lamp . 190
..................
Overheated Engine . 186
...........................
Emergency Brake .81
......................
Emergency Flashers .67
......................
Emergency Towing .197
............
Emergency Trunk Opener . 74
.......................
Emissions Controls .207
.............
Emissions Testing, State . 210
Engine ....
Coolant Temperature Gauge . 63
......
Engine Speed Limiter . 128,133
.........................
If It Won’t Start .182
Malf unction Indicator ................................
Lamp .54, 190
........
Oil Pressure Indicator . 54,188
..............
Oil, What Kind to Use . 150
...............................
Overheating .186
............................
Specif ications .202
.......................................
Starting .127
.
Evaporative Emissions Controls . 207
...............................
Exhaust Fumes .45
Expectant Mothers, Use of Seat ........................................
Belts by .16 .....................................
Fan, Interior .88
.........................................
Features, .85
....................
Filling the Fuel Tank . 113
Filters .........................
Dust and Pollen .165
...............................................
Oil .151
.............
Flashers, Hazard Warning . 67
...................
Flat Tire, Changing a . 177
Fluids ..........
Automatic Transmission . 156
..........................................
Brake .158
.........................................
Clutch .158
..............
Manual Transmission . 157
..................
Windshield Washer . 155
FM Stereo Radio .....................................
Reception .96
..........................
Four-way Flashers .67
..............................
Front Airbags .9 ,21
........................................
Front Seat .77
......................................
Adjusting .77
.....................................
Airbags .9, 21
Index
F
E
INDEX
III