2012 Hyundai Equus check engine

723
Maintenance
POWER STEERING FLUID
Checking the power steering fluid
level
With the vehicle on level ground, check
the fluid level in the power steering reser-
voir periodically. The fluid should be
between MAX and MIN marks on the
side of the gauge at the normal tempera-
ture.Before adding power steering fluid, thor-
oughly clean the area around the reser-
voir cap to prevent power steering fluid
contamination.
If the level is low, add fluid to the MAX
level.
In the event the power steering system
requires frequent addition of fluid, the
vehicle should be inspected by an
authorized HYUNDAI dealer.
Use only the specified power steering
fluid. (Refer to "Recommended lubricants
or capacities" in section 8.)
Checking the power steering
hose
Check the connections for oil leaks, dam-
age and twists in the power steering
hose before driving.
CAUTION
• To avoid damage to the power
steering water pump unit, do not
operate the vehicle for prolonged
periods with a low power steering
fluid level.
• Never start the engine when the
reservoir tank is empty.
• When adding fluid, be careful that
dirt does not get into the tank.
• Too little fluid can result in
increased steering effort and/or
noise from the power steering
system.
• The use of the non-specified fluid
could reduce the effectiveness of
the power steering system and
cause damage to it.
OBH078022

735
Maintenance
Reset items
Items should be reset after the battery
has been discharged or the battery has
been disconnected.
• Power trunk (See section 4)
• Sunroof (See section 4)
• Trip computer (See section 4)
• Climate control system
(See section 4)
• Clock (See section 4)
• Audio (See section 4)WARNING
• Before performing maintenance
or recharging the battery, turn off
all accessories and stop the
engine.
• The negative battery cable must
be removed first and installed
last when the battery is discon-
nected.
• Operation related to the battery
should be done in an authorized
HYUNDAI dealer.
CAUTION
• Keep the battery away from water
or any liquid.
• The battery is in the trunk, so you
should be careful when you load
a container filled with liquid into
the trunk.
• For your safety, use the authentic-
ity by approved authorized
HYUNDAI dealer, when you
replace the battery.
WARNING- Recharging
battery
When recharging the battery,
observe the following precautions:
• The battery must be removed
from the vehicle and placed in an
area with good ventilation.
• Do not allow cigarettes, sparks,
or flame near the battery.
• Watch the battery during charg-
ing, and stop or reduce the charg-
ing rate if the battery cells begin
gassing (boiling) violently or if
the temperature of the electrolyte
of any cell exceeds 49°C (120°F).
• Wear eye protection when check-
ing the battery during charging.
• Disconnect the battery charger in
the following order.
1. Turn off the battery charger main
switch.
2. Unhook the negative clamp from
the negative battery terminal.
3. Unhook the positive clamp from
the positive battery terminal.

Maintenance
46 7
FUSES
A vehicle’s electrical system is protected
from electrical overload damage by
fuses.This vehicle has 4 fuse panels, one locat-
ed in the driver’s side panel bolster,
another is in the front passenger’s side
panel bolster, the others are in the
engine compartment.
If any of your vehicle’s lights, acces-
sories, or controls do not work, check the
appropriate circuit fuse. If a fuse has
blown, the element inside the fuse will be
melted.
If the electrical system does not work,
first check the driver’s side fuse panel.
Before replacing a blown fuse, discon-
nect the negative battery cable.
Always replace a blown fuse with one of
the same rating.
If the replacement fuse blows, this indi-
cates an electrical problem. Avoid using
the system involved and immediately
consult an authorized HYUNDAI dealer.
Three kinds of fuses are used: blade type
for lower amperage rating, cartridge type,
and fusible link for higher amperage rat-
ings.
✽NOTICE
The actual fuse/relay panel label may
differ from equipped items.
WARNING - Fuse replace-
ment
• Never replace a fuse with any-
thing but another fuse of the
same rating.
• A higher capacity fuse could
cause damage and possibly a
fire.
• Never install a wire or aluminum
foil instead of the proper fuse -
even as a temporary repair. It may
cause extensive wiring damage
and a possible fire.
CAUTION
Do not use a screwdriver or any
other metal object to remove fuses
because it may cause a short circuit
and damage the system.
OBH072060 Normal Normal Blade type
Cartridge type
Fusible linkBlown
Blown
NormalBlown

747
Maintenance
Instrument panel fuse replace-
ment
1. Turn the engine start/stop button to the
OFF position.
2. Open the fuse panel cover.3. Pull the suspected fuse straight out.
Use the removal tool provided in the
front passenger’s side panel.
4. Check the removed fuse; replace it if it
is blown.
Spare fuses are provided in the pas-
senger compartment panel fuse panel
(or in the engine compartment fuse
panel).
5. Push in a new fuse of the same rating,
and make sure it fits tightly in the clips.
If it fits loosely, consult an authorized
HYUNDAI dealer.
If you do not have a spare, use a fuse of
the same rating from a circuit you may
not need for operating the vehicle, such
as the cigarette lighter fuse.
OBH078021
OBH078019
OBH078020
Driver’s side
Front passenger’s side
Front passenger’s sideCAUTION
• When replacing a blown fuse or
relay with a new one, make sure
the new fuse or relay fits tightly
into the clips. The incomplete fas-
tening fuse or relay may cause
the vehicle wiring and electric
systems damage and a possible
fire.
• Do not remove fuses, relays and
terminals fastened with bolts or
nuts. The fuses, relays and termi-
nals may be fastened incomplete-
ly, and it may cause a possible
fire. If fuses, relays and terminals
fastened with bolts or nuts are
blown, consult with an authorized
HYUNDAI dealer.
• Do not input any other objects
except fuses or relays into
fuse/relay terminals such as a
driver or wiring. It may cause con-
tact failure and system malfunc-
tion.

Maintenance
48 7
If the headlights or other electrical com-
ponents do not work and the fuses are
OK, check the fuse panel in the engine
compartment. If a fuse is blown, it must
be replaced.
Memory fuse
Your vehicle is equipped with a memory
fuse to prevent battery discharge if your
vehicle is parked without being operated
for prolonged periods. Use the following
procedures before parking the vehicle for
prolonged periods.
1. Turn the engine start/stop button off.
2. Turn off the headlights and tail lights.
3. Open the driver’s side panel cover and
pull up the memory fuse.
✽NOTICE
• If the memory fuse is pulled up from
the fuse panel, the warning chime,
audio, clock and interior lamps, etc.,
will not operate. Some items must be
reset after replacement. Refer to
“Battery” in this section.
• Even though the memory fuse is
pulled up, the battery can still be dis-
charged by operation of the head-
lights or other electrical devices.
OBH048020

749
Maintenance
Engine compartment fuse
replacement
1. Turn the engine start/stop button and
all other switches off.
2. Remove the fuse panel cover by
pressing the tab and pulling up.3. Check the removed fuse; replace it if it
is blown. To remove or insert the fuse,
use the fuse puller in the front passen-
ger’s side panel.
4. Push in a new fuse of the same rating,
and make sure it fits tightly in the clips.
If it fits loosely, consult an authorized
HYUNDAI dealer.
Main fuse
If the main fuse is blown, it must be
removed as follows:
1. Remove the fuse panel on the right
side in the engine compartment.
2. Remove the nuts shown in the picture
above.
3. Replace the fuse with a new one of the
same rating.
4. Reinstall in the reverse order of
removal.
✽NOTICE
If the main fuse is blown, consult an
authorized HYUNDAI dealer.
CAUTION
After checking the fuse panel in the
engine compartment, securely
install the fuse panel cover. If not,
electrical failures may occur from
water contact.
OBH078025
OBH078023L
OBH078024L

Maintenance
54 7
Engine compartment fuse panel
Description Fuse rating Protected component
ALT 200A Alternator
I/P LH PWR 60A I/P Junction Box LH
I/P RH PWR 60A I/P Junction Box RH
COOLING FAN 60A Cooling Fan Relay
EHPS 80A EHPS Module
AIR ECS 40A ECS Compressor Relay
AMP-1 40A AV JBL AMP
AMP-2 30A AMP
PDM (ACC) 30A PDM (ACC) Relay
VDC/ESC1 30A VDC/ESP Control Module, Multipurpose Check Connector
VDC/ESC2 30A VDC/ESP Control Module, Multipurpose Check Connector
PDM (IGN1) 30A PDM (IGN1) Relay
PDM (IGN2) 30A PDM (IGN2) Relay
P/SEAT DRV 30A Driver Power Seat Relay Box, IMS Control Module, Driver Lumbar Support Switch
H/LP WASHER 20A Head Lamp Washer Relay
VACUUM PUMP 20A Brake Vacuum Pump Relay
P/OUTLET (FRT) 25A ACC Socket Relay
TRUNK 10A Trunk Lid Relay
IMS 10A -
STOP LP 10A Stop Lamp Relay, Stop Lamp Switch, IPM
B/UP LP 10A Rear Combination Lamp LH/RH (IN), Electro Chromic Mirror, Camera Module, Rear Curtain Module

755
Maintenance
Description Fuse rating Protected component
ECU 30A Engine Control Relay
BLOWER 40A Blower Relay
IGN SW 2
(PRESAFETY PASS)40A Ignition Switch (IG 2, START), Presafety Seat Belt Passenger
RR HTD 40A E/R Junction Box Fuse (AQS 10A, WASHER 15A)
IGN SW 1
(PRESAFETY DRV)40A Ignition Switch (IG 1, ACC), Presafety Seat Belt Driver
A/CON 10A A/C Control Module
EPB 1 15A Electric Parking Brake Module
EPB 2 15A Electric Parking Brake Module
HORN 15A Horn Relay
IPM 10A IPM, Head Lamp (Low) Relay
AQS 10A AQS Sensor, Electronic Control Wiper Module, Blower Relay
DEICER 15A Heated Glass (FR) Relay
WASHER 15A Washer Relay
WIPER 30A Wiper Motor
HTD MIRR 10A A/C Control Module, Power Outside Mirror & Mirror Folding Motor LH/RH
TCU 15A TCM
AFLS 10A Head Lamp LH/RH
EHPS 10A EHPS Module
VDC/ESC 10A ESP Control Module, Multipurpose Check Connector
ECU(IG1) 10A ECM
IGN COIL 20A Ignition Coil #1,2,3,4,5,6
INJECTOR(B+) 15A Injector Drive Box