brakes KIA OPTIMA PHEV 2020 Service Manual

793
Maintenance
Underbody maintenance
Road salt and other corrosive chemi-
cals are used in cold weather states to
melt snow and prevent ice accumula-
tion. If these chemicals are not regu-
larly removed, they will corrode the
vehicle underbody and over time dam-
age fuel lines, the fuel tank retention
system, the vehicle suspension, the
exhaust system, and even the body
frame. The National Highway Traffic
Safety Administration has warned all
vehicle owners of all brands of the
need to take the following steps:
Wash the undercarriage of yourvehicle regularly during the winter
and whenever your vehicle has
been exposed to such salts or
chemicals.
Do a thorough washing of the undercarriage at the end of the
winter.
Use professional service techni- cians or governmental inspection
stations to annually inspect for cor-
rosion. Immediately seek an inspection of
your vehicle if you become visually
aware of corrosion flaking or scal-
ing or if you become aware of a
change in vehicle performance,
such as soft or spongey brakes,
fluids leaking, impairment of direc-
tional control, suspension noises
or rattling metal straps.
Aluminum wheel maintenance
The aluminum wheels are coated
with a clear protective finish.
Do not use any abrasive cleaner,polishing compound, solvent, or
wire brushes on aluminum wheels.
They may scratch the finish.
Clean the wheel when it has cooled.
Use only a mild soap or neutral detergent, and rinse thoroughly with
water. Also, be sure to clean the
wheels after driving on salted roads.
This helps prevent corrosion.
Avoid washing the wheels with highspeed vehicle wash brushes.
Do not use any alkaline or acid detergents It may damage and cor-
rode the aluminum wheels coated
with a clear protective finish.

Maintenance
94
7
Corrosion protection
Protecting your vehicle from corrosion
By using advanced design and con-
struction practices to combat corro-
sion, we produce vehicles of excel-
lent quality. However, this is only part
of the job. To achieve the long-term
corrosion resistance your vehicle can
deliver, the owner's cooperation and
assistance is also required.
Common causes of corrosion
The most common causes of corro-
sion on your vehicle are:
Road salt, dirt and moisture that is
allowed to accumulate underneath
the vehicle.
Removal of paint or protective coatings by stones, gravel, abra-
sion or minor scrapes and dents
which leave unprotected metal
exposed to corrosion. High-corrosion areas
If you live in an area where your vehi-
cle is regularly exposed to corrosive
materials, corrosion protection is
particularly important. Some of the
common causes of accelerated cor-
rosion are road salts, dust control
chemicals, ocean air and industrial
pollution.
Moisture breeds corrosion
Moisture creates the conditions in
which corrosion is most likely to
occur. For example, corrosion is
accelerated by high humidity, partic-
ularly when temperatures are just
above freezing. In such conditions,
the corrosive material is kept in con-
tact with the vehicle’s surface by
moisture that evaporates slowly.
Mud is particularly corrosive
because it dries slowly and holds
moisture in contact with the vehicle.
Although the mud appears to be dry,
it can still retain the moisture and
promote corrosion.WARNING
After washing the vehicle, test
the brakes while driving slowly
to see if they have been affected
by water. If braking performance
is impaired, dry the brakes by
applying them lightly while
maintaining a slow forward
speed.

I3
Index
Brake fluid ....................................................................7-25\
Checking the brake fluid level ....................................7-25
Brake system..................................................................5-19 Anti-lock Brake System (ABS) ..................................5-33
Auto hold ....................................................................5-29\
Electronic Parking Brake (EPB) ................................5-22
Electronic Stability Control (ESC) ............................5-34
Good braking practices ..............................................5-41
Hill-start Assist Control (HAC) ..................................5-40
Parking brake - Foot type ..........................................5-21
Power brakes ..............................................................5-19
Vehicle Stability Management (VSM)........................5-39
Warning messages ......................................................5-31
Bulb wattage ....................................................................8-3
Checking fluid levels ....................................................7-17
Child Restraint System (CRS) ......................................3-33 Children always in the rear ........................................3-33
Installing a Child Restraint System (CRS) ................3-37
Selecting a Child Restraint System (CRS) ................3-34
Clean air ......................................................................4-\
137
Climate control air filter ................................................7-30 Filter inspection ..........................................................7-30
Consumer assistance (U.S. only) ..................................8-11 Emergency roadside assistance ..................................8-11
Registering your vehicle in a foreign country ............8-13 Toll free consumer assistance ....................................8-11
Trip interruption ..........................................................8-12
Coolant ........................................................................\
..7-21 Changing the coolant ..................................................7-24
Checking the coolant level..........................................7-21
Engine coolant ............................................................7-22
Inverter coolant ..........................................................7-22
Recommended coolant ................................................7-23
Cruise Control System ..................................................5-72 To cancel cruise control, do one of the following ......5-74
To decrease the cruising speed ..................................5-74
To increase cruise control set speed ..........................5-73
To resume cruising speed at more than approximately 20 mph (30 km/h) ....................................................5-75
To set cruise control speed..........................................5-73
To temporarily accelerate with the cruise control on ..5-74
To turn cruise control off, do one of the following ....5-75
Declaration of Conformity ..........................................4-156 FCC ........................................................................\
..4-156
Defroster ......................................................................4-\
118 Rear window defroster ..............................................4-118
Dimensions ......................................................................8-\
2
Door locks......................................................................4-\
13 Child-protector rear door lock ....................................4-16
Impact sensing door unlock system ............................4-16
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