2016 Hyundai Equus check engine

7-27
Maintenance07
The high-pressure cooling system
has a reservoir filled with the year-
round antifreeze coolant. The reser-
voir is already filled at the factory.
Check the antifreeze protection and
coolant level at least once a year, at
the beginning of the winter season,
and before traveling to a colder
region.
Checking the coolant level
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(Continued)

operating, but when the
engine and radiator are hot,
do not remove the radiator
cap or the drain the plug. Hot
coolant and steam may blow
out under pressure, causing a
serious injury.
The electric motor (of
the cooling fan) is
controlled by the
engine coolant tem-
perature, refrigerant
pressure and driving speed. It
may operate, even when the
engine is not running. Use
extreme caution, when working
near the cooling fan blades. So,
you are not injured by the fan-
blade rotation. As the engine
coolant temperature decreases,
the electric motor will automati-
cally turn off. This is a normal.
When your vehicle is equipped
with GDI, the electric motor (of
the cooling fan) may operate
until the negative battery cable
is disconnected.
WARNING
Removing the radia-
tor cap
Never attempt to remove the radiator cap while the engine
is running, or when the engine
is hot. This may damage the
cooling system and the
engine, resulting in a serious
personal injury due to the hot
coolant or steam.
Turn the engine off and wait until it cools down. Use
extreme care when removing
the radiator cap. Wrap a thick
towel around it, and slowly turn
it in a counterclockwise direc-
tion to the first stop. Step back
while the pressure is released
from the cooling system.
When you are sure all the pres-
sure is released, press down
on the cap over a thick towel,
and turn it in a counterclock-
wise direction to remove it.
(Continued)
WARNING

7-28
Maintenance
Check all the cooling system hoses
and heater hoses. If necessary,
replace any swollen or deteriorated
one. The coolant level should
be between F and L marks
on the coolant reservoir,
when the engine is cool.
When the coolant level is low, add
distilled (deionized) water. Bring up
the level to F, but do not overfill.
When frequent additions are
required, have an authorized
EQUUS dealer inspect your cooling
system.
Recommended engine coolant
When adding coolant, use the deionized water, distilled water or
soft water. Never add hard water in
the coolant. An improper coolant
mixture may result in serious mal-
function or engine damage.
The engine parts are made of alu- minum and must be protected by
an ethyleneglycol-based coolant
from any corrosion and freezing.
DO NOT USE alcohol or methanol coolant, nor mix them with the
authorized coolant. Do not use the solution of which
the antifreeze portion is above
60% or below 35%. This may
reduce the solution effects.
Mix the water and antifreeze in the half-and-half ratio. This solution will
work in most situations.
For the proper mixture ratio, refer to
the following table.
Information
The half-and-half ratio solution of
water and antifreeze is effective at a
temperature of -31°F (-35°C) and
higher.
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OVI075004N
5°F (-15°C) 35 65
-13°F (-25°C) 40 60
-31°F (-35°C) 50 50
-49°F (-45°C) 60 40
Ambient
Temperature Mixture Percentage (volume)
Antifreeze Water

7-30
Maintenance
Checking the brake fluid level
Check the fluid level in the reservoir
on a regular basis. The fluid level
should be between MAX and MIN
marks on the reservoir.
Before opening the reservoir cap to
add brake fluid, clean the area
around the reservoir cap to prevent
brake fluid from being contaminated.
When the level is low, add fluid near
to the MAX level. The level decreas-
es, as the vehicle drives. This is a
normal, associated with the wear-out
of the brake linings. When the fluid
level is excessively low, have the
brake system checked by an author-
ized EQUUS dealer.
Use only the authorized brake fluid.(Refer to “Recommended lubricantsor capacities” in the chapter 8.)
Never mix different types of fluid.
Do not spill the brake fluid over
the body paint. This may damage
the paint. The brake fluid, which is
exposed in the air for an extended
period of time, should not be
used, as its quality cannot be
guaranteed. It should be disposed
in a proper manner. Do not add
unauthorized fluid. A few drops of
mineral-based oil, such as engine
oil, in your brake system may
damage brake system parts.
NOTICE
B B R
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- Loss of brake fluid
When the brake system
requires frequent fluid addition,
the vehicle should be inspected
by an authorized EQUUS dealer.
WARNING
- Brake fluid
When changing and adding
brake fluid, pay special atten-
tion to it. Before washing your
hands, do not touch your eyes.
When the brake fluid should
come in contact with your eyes,
immediately wash them with
fresh tap water. Immediately
have your eyes examined by a
doctor.
WARNING
OVI075006N

7-31
Maintenance07
Checking the power steering
fluid level
Check the fluid level in the power
steering reservoir on a regular basis,
after parking on a level ground. The
fluid level should be between MAX
and MIN marks on the gauge at a
normal temperature.
Before adding power steering fluid,
clean the area around the reservoir
cap to prevent power steering fluid
contamination.
When the level is low, add the fluid
near to the MAX level.
When the power steering system
requires frequent fluid addition, have
the vehicle inspected by an author-
ized EQUUS dealer. To avoid damage to the power
steering pump, do not operate
the vehicle for a prolonged peri-
od of time, when the power
steering fluid level is low.
Never start the engine when the reservoir tank is empty.
Pay special attention while adding the fluid. So, any dirt
does not get into the tank.
Low level of the fluid may increase the steering effort and
noise from the power steering
system.
The use of the unauthorized fluid may reduce the effects of
the power steering system and
damage it.
Use only the authorized power steer-ing fluid. (Refer to "Recommendedlubricants or capacities" in the chap-ter 8.)
Checking the power steering
hose
Check the connections for any oil
leakage, damages and twists, before
driving.
NOTICE
P P O
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OVI075162N

7-56
Maintenance
A vehicle’s electrical system is pro-
tected from a possible electrical
overloading damage by fuses.
This vehicle has 4 fuse panels - two
on the driver’s side, another on the
panel bolster of the passenger's
side, and the other in the engine
compartment.
When any of your lights, acces-
sories, or controls does not operate,
check the appropriate circuit fuse.
When a fuse is out, some elements
may melt inside.
When the electrical system does not
operate, check the fuse panel on the
driver's side first.
Before replacing the fuse, disconnect
the negative battery cable. Always
replace it with a fuse of the same rat-
ing. When the newly-replaced fuse
blows, there may be an electrical
problem. Avoid using any pertinent
systems. Immediately consult an
authorized EQUUS dealer.
Three kinds of fuses are to be used:
a blade type for lower amperage rat-ing, and a cartridge type and a fusiblelink for higher amperage ratings.
Information
The actual fuse, relay panels, and
labels may differ from the equipped
items.
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F F U
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OVI075172N
Normal
Normal
Blade type
Cartridge type
Fusible link Blown
Blown
Normal Blown
- Fuse replacement
Never replace a fuse with the
one of a different rating.
A higher capacity fuse may cause damage or a fire.
Never use a wire or an alu- minum foil, instead of a prop-
er fuse - even as an emergent
measure. It may damage
extensive wirings and cause a
fire.
WARNING
Do not use a screwdriver or any
other metal object to remove a
fuse. It may cause a short cir-
cuit and damage the system.
CAUTION

7-58
Maintenance
3.Pull straight out a fuse, which is suspected to be out. Use the fuse
puller provided in the panels either
on the driver’s side or the front pas-
senger’s side.
4. Check the removed fuse. When the fuse is out, replace it.
Spare fuses are provided in the
fuse panels in the front passen-
ger's side. (or in the fuse panel of
the engine compartment)
5. Install a new fuse of the same rat- ing, and tightly secure it in the
clips.
When it is loosely fit, consult an
authorized EQUUS dealer.
When you do not have a spare fuse,
use a fuse of the same rating from a
circuit, such as a cigarette lighter fuse,
which may not be needed to drive. When the headlamps or other electri-
cal components do not operate, but
when the fuses are not blown out,
check the fuse panel in the engine
compartment. In case that a fuse is
blown out, it must be replaced.fuse is
blown, it must be replaced.
Fuse switch
Always set the transportation fuse
switch in the "ON" position. When
you press it OFF, some devices,
such as the audio and the digital
clock, must be reset. Also, the Smart
Key may not properly operate.
Always set the transportation
fuse switch in the "ON" position
while driving.
Do not repeatedly press the transportation fuse switch. The
fuse switch may be worn out.
Information
When you do not drive your vehicle
more than 1 month, press OFF the
transportation fuse switch to prevent
a battery discharge.
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NOTICE
OVI075101N
Driver’s side
OVI075174N
Front passenger’s side
OVI075102N

7-59
Maintenance07
Engine compartment fuse
replacement
1. Turn OFF the ignition switch andall the other switches.
2. Open the fuse panel cover by pressing the tab.
3. Check the removed fuse. When the fuse is out, replace it. To
remove or insert the fuse, use the
fuse puller in the panel on the front
passenger’s side.
4. Install a new fuse of the same rat- ing, and tightly secure it in the
clips. When it is loosely fit, consult
an authorized EQUUS dealer. After checking the fuse panel in
the engine compartment, securely
close the fuse panel cover. If not,
electrical failures may occur due
to a possible water contact.
Main fuse
When the main fuse is out, it must be
removed in the following procedure:
1. Open the fuse panel cover on the
right side of the engine compart-
ment.
2. Loosen the nuts, as shown in the above illustration.
3. Use a new fuse of the same rating.
4. Install the new fuse in the reverse order.
Information
When the main fuse is blown out, con-
sult an authorized EQUUS dealer.
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NOTICE
OVI075175N
OVI075176N
OVI075177N

7-67
Maintenance07
Engine compartment main fuse panel
Fuse Name Fuse ratingCircuit Protected
WIPER (B+) 30A Electronic Control Wiper Module FAM 2 (B+) 40A FAM
FAM 1 (B+) 40A FAM START 30A Start Relay
WASHER 15A Washer Relay
WIPER (IG2) 10A Electronic Control Wiper Module DEICER 15A Deicer Relay
CRUISE (B+) 10A H/Lamp Relay, Smart Cruise Control Module HORN 15A Horn Relay
EPB 2 15A Electric Parking Brake Module
EPB 1 15A Electric Parking Brake Module
A/CON 10A A/C Control Module
BLOWER 40A Blower Relay
PRESAFETY
SEAT BELT LH 40A Driver Pre-Safe Seat Belt
RR HTD 40A RR HTD Relay
PRESAFETY
SEAT BELT RH 40A Passenger Pre-Safe Seat Belt
ECU (IG1) 10A ECM, Alternator ESC 10AESC Module, E/R Fuse &
Relay Box (Multipurpose Check Connector)
EHPS 10A EHPS Module
AFLS 10A Head Lamp LH/RH
TCU 15A TCM, Transmission Range Switch
HTD MIRR 10A Driver/Passenger Power Outside Mirror F/PUMP 20A F/Pump Relay
ROOM LAMP 10A Room Lamp Relay ECU (B+) 15A ECM, TCM
B/UP LAMP 10A Steering Angle Sensor, B/UP LP RLY’S’
CRUISE (IG1) 10A Smart Cruise Control Module
INJECTOR (IG1) 10A Injector Drive Box H/LAMP LH 15A Head Lamp LH
H/LAMP RH 15A Head Lamp RH
3 SENSOR 10A ECM, F/Pump Relay, Camshaft Position Sensor
(BANK1/BANK2) (Intake/Exhaust)
2 SENSOR 10A Canister Close Valve, Oil Control Valve #1 ~ #4, E/R Fuse &
Relay Box (C/Fan Relay), Purge Control Solenoid Valve
1 SENSOR 10A ECM, Oxygen Sensor #1 ~ #4
INJECTOR (B+) 15A Injector Drive Box IGN COIL 20A Condenser #1/#2, Ignition Coil #1 ~ #8ECU 30A ECU Relay