2010 Hyundai Equus check engine

721
Maintenance
BRAKE FLUID
Checking the brake fluid level
Check the fluid level in the reservoir peri-
odically. The fluid level should be
between MAX and MIN marks on the
side of the reservoir. Before removing the reservoir cap and
adding brake fluid, clean the area around
the reservoir cap thoroughly to prevent
brake fluid contamination.
If the level is low, add fluid to the MAX
level. The level will fall with accumulated
mileage. This is a normal condition asso-
ciated with the wear of the brake linings.
If the fluid level is excessively low, have
the brake system checked by an author-
ized HYUNDAI dealer.
Use only the specified brake fluid. (Refer
to “Recommended lubricants or capaci- ties” in section 8.)
Never mix different types of fluid.
WARNING - Brake fluid
When changing and adding brake
fluid, handle it carefully. Do not let it
come in contact with your eyes. Ifbrake fluid should come in contact
with your eyes, immediately flush
them with a large quantity of fresh
tap water. Have your eyes examined
by a doctor as soon as possible.
WARNING - Loss of brake fluid
In the event the brake system
requires frequent additions of fluid,
the vehicle should be inspected by
an authorized HYUNDAI dealer.
CAUTION
Do not allow brake fluid to contact the vehicle's body paint, as paintdamage will result. Brake fluid, which has been exposed to open airfor an extended time should never
be used as its quality cannot be guaranteed. It should be disposedof properly. Don't put in the wrong kind of fluid. A few drops of miner-
al-based oil, such as engine oil, in your brake system can damagebrake system parts.
OBH078006L
OBH078006N
3.8L
4.6L

Maintenance
22
7
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 fluidcontamination.
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 steeringfluid 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/ornoise from the power steering
system.
The use of the non-specified fluid could reduce the effectiveness ofthe power steering system andcause damage to it.
OBH078022

731
Maintenance
Battery recharging
Your vehicle has a maintenance-free,
calcium-based battery.
If the battery becomes discharged in ashort time (because, for example, the
headlights or interior lights were left on
while the vehicle was not in use),
recharge it by slow charging (trickle)
for 10 hours.
If the battery gradually discharges because of high electric load while the
vehicle is being used, recharge it at 20-
30A for two hours.
(Continued)
Never attempt to recharge thebattery when the battery cables are connected.
The electrical ignition system works with high voltage. Never
touch these components with theengine running or the ignition
switched on.
Failure to follow the above warn-
ings can result in serious bodily
injury or death.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.
CAUTION
When you don’t use the vehicle
for a long time in the low temper-
ature area, separate the batteryand keep it indoors.
The power trunk is not closedcompletely when the battery isseparated. When you separate the
battery from the vehicle, refer to"Power trunk" in section 4.
Always charge the battery fully to prevent the battery case dam-
aged in low temperature area.
WARNING
Separating the battery from the
vehicle should be done in an
authorized HUNDAI dealer.

743
Maintenance
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 bemelted.
If the electrical system does not work,
first check the driver’s side fuse panel.
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.
1VQA4037
Normal
Normal
Blade type
Cartridge type
Fusible link Blown
Blown
Normal Blown
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 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 circuitand damage the system.

Maintenance
44
7
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 on 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.
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 mustbe replaced.
OBH078021
OBH078019
OBH078020
Driver’s side
Front passenger’s side
Front passenger’s side

Maintenance
46
7
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 engine com-
partment fuse 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 rightside 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 fromwater contact.OBH078025
OBH078023N
OBH078024N
4.6L
4.6L

751
Maintenance
Engine compartment fuse panel
Description Fuse rating Protected component
ALT 200A Alternator
I/P POWER(LH) 60A I/P Junction Box LH
I/P POWER(RH) 60A I/P Junction Box RH
COOLING FAN 60A Cooling Fan Relay
EHPS 80A EHPS Motor
ECS 40A ECS Compressor Relay
AMP-1 40A AV JBL AMP
AMP-2 30A AMP
ESCL(ACC) 30A ESCL (ACC) Relay
ESP-1 30A ESP Control Module, Multipurpose Check Connector
ESP-2 30A ESP Control Module
ESCL(IGN1) 30A ESCL (IGN1) Relay
ESCL(IGN2) 30A ESCL (IGN2) Relay
P/SEAT(FR-LH) 30A Driver Lumbar Support Valve, Driver IMS Control Module, Driver Lumbar Support Switch
H/LP WASHER 20A Head Lamp Washer Relay
P/OUTLET(FR) 25A Front Power Outlet Relay, Cigar Lighter
TRUNK OPEN 10A Trunk Lid Open Relay
IMS 10A IMS Relay
STOP LP 10A Stop Lamp Relay, Stop Lamp Switch, IPM, ESP Control Module, High Mounting Stop Lamp
B/UP LP-1 (G8BA) 10A Back Up Lamp Relay
B/UP LP-2 (G6DA) 10A Rear Combination Lamp LH/RH, Electro Chromic Mirror, Rear Curtain Module, Audio, AV Head Module

Maintenance
52
7
Engine compartment fuse panel
Description Fuse rating Protected component
WIPER 30A Electronic Control Wiper Module
FAM POWER-2 40A FAM
FAM POWER-1 40A FAM
START 30A Start Relay
WASHER 15A Washer Relay
AQS 10A AQS Sensor, Blower Relay, Electronic Control Wiper Module
HTD GLASS(FR) 15A HTD Glass(FR) Relay
IPM 10A IPM, H/LP(Low) Relay
HORN 15A Horn Relay
EPB-1 15A EPB Control Module
EPB-2 15A EPB Control Module
A/CON 10A A/C Control Module
BLOWER MOTOR 40A Blower Relay
PRESAFETY(LH) 40A Pre-Safe Seat Belt LH
HTD GLASS(RR) 40A HTD Glass(RR) Relay
PRESAFETY(RH) 40A Pre-Safe Seat Belt RH
ECU(IG1) 10A ECM
ESP 10A ESP Control Module, E/R Fuse & Relay Box (Multipurpose Check Connector)
EHPS 10A EHPS Module
AFLS 10A Head Lamp LH/RH
TCU 15A TCM
MIRROR HTD 10A A/C Control Module, Power Outside Mirror LH/RH
FUEL PUMP 20A Fuel Pump Relay
ROOM LP 10A Room LP Relay
ECU(B+) 10A ECM, TCM
STOP LP 10A Stop Lamp Switch, Alternator (G6DA), E/R Fuse & Relay Box (Stop Lamp Relay)
CRUISE 10A Smart Cruise Control Module