2012 CHEVROLET VOLT heater

Black plate (3,1)Chevrolet Volt Owner Manual - 2012
Driving and Operating 9-3
Use Mountain Mode prior to
climbing long, steep grades in
mountainous areas. Be sure to
engage Mountain Mode before
starting to climb. Mountain Mode
reduces electric range and power
but may be needed to maintain
speeds above 96 km/h (60 mph)
when climbing grades of 5% or
greater.
Use L (Low) in heavy stop‐and‐go
traffic or when traveling downhill.
L (Low) requires less brake pedal
application and provides a
controlled, efficient way to slow the
vehicle down.
Climate Setting
Using the heat and air conditioning
systems decreases the energy
available for electric driving.
Optimal energy efficiency is
achieved with the heat, air
conditioning, and fan turned off.Less energy is used at low fan
speeds. When using the fan:
.Fan Only is the most energy
efficient climate setting as long
as
0is not selected.
.ECO is for moderate air
conditioning and heater
operation and is the next most
energy efficient setting as long
as
0is not selected.
.Comfort provides the most
comfort but is the least energy
efficient.
Use the auto heated seat feature
instead of climate settings. Heating
the seat uses less energy than
heating the vehicle interior. Use remote start to heat or cool the
interior when the vehicle is plugged
in to maximize the electric range by
utilizing electricity from the electrical
outlet.
Engine Assisted Heating operation,
if equipped, can be personalized.
See
Vehicle Personalization on
page 5‑56 for more information.
In hot weather, avoid parking in
direct sunlight or use sunshades
inside the vehicle.
Turn off the front and rear window
defog/defrost when they are no
longer needed.
Avoid driving with the windows open
at highway speeds.

Black plate (15,1)Chevrolet Volt Owner Manual - 2012
Vehicle Care 10-15
Cooling System (Engine)
When it is safe to lift the hood:
A. Engine Coolant Surge Tank andPressure Cap
B. Engine Cooling Fans (Out of View)
{WARNING
The electric fans under the hood
can start up even when the
engine is not running and can
cause injury. Keep hands,
clothing, and tools away from any
underhood electric fan.
If the coolant inside the coolant
surge tank is boiling, do not do
anything else until it cools down.
The vehicle should be parked on a
level surface.
The coolant level should be up to
the cold fill line. If it is not, there
might be a leak at the radiator
hoses, heater hoses, radiator, water
pump, or somewhere else in the
cooling system.
{WARNING
Heater and radiator hoses, and
other engine parts, can be very
hot. Do not touch them. If you do,
you can be burned.
Do not run the vehicle if there is a
leak. If you run the engine, it
could lose all coolant. That could
cause an engine fire, and you
could be burned. Get any leak
fixed before you drive the vehicle.
If there seems to be no leak, with
the engine on, check to see if the
electric cooling fans are running.
If the engine is overheating, the fans
should be running. If it is not, the
vehicle needs service. Turn off the
vehicle.

Black plate (16,1)Chevrolet Volt Owner Manual - 2012
10-16 Vehicle Care
Cooling System (High
Voltage Battery)
During vehicle operation and also
during charging, the high voltage
battery cells in the vehicle are kept
within a normal operating
temperature range. If the
temperature rises above this
temperature, the battery cooling
system turns on the air conditioning
compressor and cools the coolant
until the correct temperature is
reached. If the temperature falls
below this temperature, a high
voltage heater, located in the
battery, heats the coolant until the
correct temperature is reached.
What to Use
The high voltage battery coolant
reservoir in the vehicle is filled with
a 50/50 mixture of DEX-COOL
engine coolant and deionized water.
If using this mixture, nothing else
needs to be added.
The coolant needs to be replaced
every 5 years or 240 000 km
(150,000 mi), whichever occurs first.
Checking Coolant
The vehicle must be on a level
surface when checking the coolant
level.
The high voltage battery coolant
reservoir is located on the
passenger side of the engine
compartment. SeeEngine
Compartment Overview on
page 10‑8 for more information on
location.
Check to see if coolant is visible in
the high voltage battery coolant
reservoir. If coolant is visible but the
coolant level is below the cold fill
line, there could be a leak in the
cooling system.
The high voltage battery coolant
should only be serviced by a
qualified technician.

Black plate (18,1)Chevrolet Volt Owner Manual - 2012
10-18 Vehicle Care
Engine Coolant
The engine cooling system in the
vehicle is filled with DEX-COOL
engine coolant. The coolant needs
to be replaced every 5 years or
240 000 km (150,000 mi), whichever
occurs first.
The following explains the cooling
system and how to check and add
coolant when it is low. If there is a
problem with engine overheating,
seeEngine Overheating on
page 10‑21.
What to Use
{WARNING
Adding only plain water or some
other liquid to the cooling system
can be dangerous. Plain water
and other liquids, can boil before
the proper coolant mixture will.
The coolant warning system is set
for the proper coolant mixture.
With plain water or the wrong
mixture, the engine could get too
hot but you would not get the
overheat warning. The engine
could catch fire and you or others
could be burned. Use a
50/50 mixture of deionized water
and DEX-COOL coolant. Use a 50/50 mixture of deionized
water and DEX-COOL coolant.
If using this mixture, nothing else
needs to be added. This mixture:.Gives freezing protection down
to
−37°C (−34°F), outside
temperature.
.Gives boiling protection up to
129°C (265°F), engine
temperature.
.Protects against rust and
corrosion.
.Will not damage aluminum parts.
.Helps keep the proper engine
temperature.
Notice: If an improper coolant
mixture is used, the engine could
overheat and be badly damaged.
The repair cost would not be
covered by the vehicle warranty.
Too much water in the mixture
can freeze and crack the engine,
radiator, heater core, and other
parts.

Black plate (35,1)Chevrolet Volt Owner Manual - 2012
Vehicle Care 10-35
Mini Fuses Usage4 Ignition Coils/
Injectors
5 Not Used
6a Empty
6b Not Used 7 Empty
8 Empty
9 Heated Mirrors
10 Air Conditioning
Control Module
11 Traction Power
Inverter
Module
–Battery
12 Not Used
13 Cabin Heater Pump
and Valve
14 Not Used Mini Fuses Usage
15 Traction Power
Inverter Module and
Transmission
Control
Module
–Battery
17 Engine Control
Module
–Battery
22 Left High‐Beam
Headlamp
24 Empty
25 Empty
26 Not Used
31 Not Used
32 Run/
Crank
–Sensing
Diagnostic Module
(SDM), Instrument
Cluster, Passenger
Airbag Display,
Automatic Dimming
Inside Rearview
Mirror (If Equipped) Mini Fuses Usage
33 Run/Crank for
Vehicle Integration
Control Module
34 Vehicle Integration
Control
Module
–Battery
35 Not Used
36 Power Electronics
Coolant Pump
37 Cabin Heater
Control Module
38 Rechargeable
Energy Storage
System (High
Voltage Battery)
Coolant Pump