Get Maintenance -> Emission control system Guide for Hyundai Tucson SUV Third Generation (2016-2019)

Maintenance

EMISSION COONTROL SYSTEM

The emission control system of your

vehicle is covered by a written limited

warranty. Please see the warranty

information contained in the Service

Passport in your vehicle.

1. Crankcase emission control

system

CAUTION

The positive crankcase ventilation

system is employed to prevent air

pollution caused by blow-by gases

being emitted from the crankcase.

This system supplies fresh filtered air

to the crankcase through the air

intake hose. Inside the crankcase,

the fresh air mixes with blow-by

gases, which then pass through the

PCV valve into the induction system.

For the Inspection and Maintenance

Test (With Electronic Stability Control

(ESC) system)

Your vehicle is equipped with an

emission control system to meet all

emission regulations.

• To prevent the vehicle from

misfiring during dynamome-

ter testing, turn the Electronic

Stability Control (ESC) sys-

tem off by pressing the ESC

switch.

There are three emission control

systems which are as follows.

(1) Crankcase emission control sys-

tem

• After dynamometer testing is

completed, turn the ESC sys-

tem back on by pressing the

ESC switch again.

2. Evaporative emission con-

trol system

(2) Evaporative emission control sys-

tem

(3) Exhaust emission control system

The Evaporative Emission Control

System is designed to prevent fuel

vapors from escaping into the atmos-

phere.

In order to assure the proper function

of the emission control systems, it is

recommended that you have your car

inspected and maintained by an

authorized HYUNDAI dealer in accor-

dance with the maintenance schedule

in this manual.

7-100

Canister

Engine exhaust gas precautions

(carbon monoxide)

3. Exhaust emission control

system

Fuel vapors generated inside the fuel

tank are absorbed and stored in the

onboard canister.When the engine is

running, the fuel vapors absorbed in

the canister are drawn into the surge

tank through the purge control sole-

noid valve.

• Carbon monoxide can be present

with other exhaust fumes.Therefore,

if you smell exhaust fumes of any

kind inside your vehicle, have it

inspected and repaired immediately.

If you ever suspect exhaust fumes

are coming into your vehicle, drive it

only with all the windows fully open.

Have your vehicle checked and

repaired immediately.

The Exhaust Emission Control System

is a highly effective system which con-

trols exhaust emissions while main-

taining good vehicle performance.

Vehicle modifications

This vehicle should not be modified.

Modification of your vehicle could

affect its performance, safety or

durability and may even violate gov-

ernmental safety and emissions reg-

ulations.

Purge Control Solenoid Valve

(PCSV)

The purge control solenoid valve is

controlled by the Engine Control

Module (ECM); when the engine

coolant temperature is low during

idling, the PCSV closes so that evap-

orated fuel is not taken into the

engine. After the engine warms-up

during ordinary driving, the PCSV

opens to introduce evaporated fuel to

the engine.

In addition, damage or performance

problems resulting from any modifi-

cation may not be covered under

warranty.

• If you use unauthorized electronic

devices, it may cause the vehicle to

operate abnormally, wire damage,

battery discharge and fire. For your

safety, do not use unauthorized

electronic devices.

7

7-101

Maintenance

• Do not operate the engine in con-

fined or closed areas (such as

garages) any more than what is

necessary to move the vehicle in or

out of the area.

Operating precautions for cat-

alytic converters (if equipped)

WARNING

Engine exhaust gases contain

carbon monoxide (CO). Though

colorless and odorless, it is dan-

gerous and could be lethal if

inhaled. Follow the instructions

following to avoid CO poisoning.

WARNING

• When the vehicle is stopped in an

open area for more than a short

time with the engine running,

adjust the ventilation system (as

needed) to draw outside air into the

vehicle.

• A hot exhaust system can

ignite flammable items under

your vehicle. Do not park, idle,

or drive the vehicle over or

near flammable objects, such

as dry grass, paper, leaves, etc.

• Never sit in a parked or stopped

vehicle for any extended time with

the engine running.

• The exhaust system and cat-

alytic system are very hot while

the engine is running or imme-

diately after the engine is

turned off. Keep away from the

exhaust system and catalytic,

you may get burned.

• When the engine stalls or fails to

start, excessive attempts to restart

the engine may cause damage to

the emission control system.

Also, do not remove the heat

sink around the exhaust sys-

tem, do not seal the bottom of

the vehicle or do not coat the

vehicle for corrosion control. It

may present a fire risk under

certain conditions.

7-102

Your vehicle is equipped with a cat-

alytic converter emission control

device.

Failure to observe these precautions

could result in damage to the catalytic

converter and to your vehicle.

(Continued)

• Do not operate the engine at

high idle speed for extended

periods (5 minutes or more).

Therefore, the following precautions

must be observed:

Additionally, such actions could void

your warranties.

• Do not modify or tamper with

any part of the engine or emis-

sion control system. All inspec-

tions and adjustments must be

made by an authorized HYUNDAI

dealer.

CAUTION

• Use only UNLEADED FUEL for

gasoline engine.

• Do not operate the vehicle when

there are signs of engine mal-

function, such as misfire or a

noticeable loss of performance.

• Avoid driving with a very low

fuel level. If you run out of

gasoline, it could cause the

engine to misfire and result in

excessive loading of the cat-

alytic converter.

• Do not misuse or abuse the

engine. Examples of misuse are

coasting with the engine off and

descending steep grades in

gear with the engine off.

(Continued)

7

7-103

Maintenance

The Malfunction Indicator Lamp (MIL)

stops illuminating, when the driving

speed exceeds 60 km/h (37mph), or

when the engine rpm is between

1,500 and 2,500 with the gear in the

2nd position or above for approxi-

mately 25 minutes.

Diesel particulate filter (DPF)

(if equipped)

CAUTION

The Diesel Particulate Filter (DPF)

system removes the soot in the

exhaust gas.

Diesel Fuel

(if equipped with DPF)

We recommend you to use only

the regulated diesel fuels, when

your vehicle is equipped with

the DPF system.

The DPF system automatically burns

(or oxidizes) the accumulated soot in

accordance with the driving situa-

tions, unlike a disposable air filter.

When the MIL continuously blinks or

the warning message “Check exhaust

system” illuminates in the above

cases, we recommend you to have the

DPF system checked by an author-

ized HYUNDAI dealer.

When you use other diesel fuels,

which is high in sulfurs (above

50 ppm) or contains unspecified

additives, it may damage the

DPF system and cause the white

smoke emission.

In other words, the accumulated soot

is automatically purged out by the

engine control system and by the high

exhaust-gas temperature at normal/

high driving speeds.

When the vehicle is continuously driv-

en with the MIL flashing for an extend-

ed period of time, it may damage the

DPF system and lower the fuel econ-

omy.

However, when the vehicle is continu-

ally driven at repeated short distance

or driven at low speed for a long time,

the accumulated soot may not be

automatically removed because of low

exhaust gas temperature. In this case,

the accumulated soot is out of the

detection range, the soot oxidization

process does not occur, and the

Lean NOx Trap (if equipped)

The Lean NOx Trap (LNT) system

removes the nitrogen oxide in the

exhaust gas. The smell can occur in

the exhaust gas depending on the

quality of the fuel and it can degrade

NOx reduction performance, please

use the regulated automotive diesel

fuel.

Malfunction Indicator Lamp (

Illuminates.

)

7-104

Maintenance -> Emission control system for Your Hyundai Tucson SUV Third Generation (2016-2019)

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