SsangYong Rexton. Service manual — part 436

SSANGYONG Y200

1F2-66 M161 ENGINE CONTROLS

STOP LAMP SWITCH

YAD1F550

Failure

Code

Description

Trouble Area

Maintenance Hint

Stop lamp switch failure

When malfunction of stop

lamp switch-implausible

condition of stop lamp

signal input

•

Monitoring the actual operational status

and vehicle speed signal through scan
tool

•

Inspection the Engine Control Module

(ECM) pin 49 about short circuit or open
with bad contact

•

Inspection the contact condition of stop

lamp switch

•

Inspection the ECM

135

Circuit Description

The stop lamp switch is normally opened. When the ignition switch ON and brake ON, the battery voltage is
supplied to the ECM. A scan tool should display ON when brake pedal is depressed and should read OFF with
brake pedal released.

M161 ENGINE CONTROLS 1F2-67

SSANGYONG Y200

ENGINE RPM

YAD1F560

Failure

Code

Description

Trouble Area

Maintenance Hint

Engine rpm output

circuit short circuit to

battery

Engine rpm output

circuit short circuit to

ground or open

When short circuit to battery

When short circuit to ground

or open

•

Monitoring the actual rpm in cluster

•

Inspection the Engine Control Module
(ECM) pin 60 about short circuit or open

•

Inspection the cluster panel board circuit

•

Inspection the ECM

32

33

SSANGYONG Y200

1F2-68 M161 ENGINE CONTROLS

EXHAUST SYSTEM

CATALYTIC CONVERTER

The purpose of the catalytic converter is to convert
the three pollutants of carbon monoxide (CO),
hydrocarbons (HC) and oxides of nitrogen (NOx)
contained in the exhaust of gasoline engines, into the
harmless compounds of water (H2O), carbon dioxide
(CO2) and nitrogen (N2).

The catalytic converter contains acatalyst, a word
coming from the Greek and which designates the
element essential for catalyst which triggers chemical
reactions without itself being consumed.

These catalysts in the 3-way catalytic converter are
the rare metals platinum (Pt) and rhodium (Rh).

The catalytic converter consists essentially of three
main elements. The exhaust gases flow through the
catalytic converter and, in so doing, coming into
contact with rare metals (Pt and Rh).

The following chemical reaction are produced.

CO + O

2

→

CO

2

HC + O

2

→

CO

2

+ H

2

O

NO

x

→

N

2

+ O

2

SSANGYONG Y200

1F2-70 M161 ENGINE CONTROLS

OXYGEN SENSOR

YAD1F570

The oxygen sensor is unique amongthe engine control
sensors because is acts like a battery and is able to
generate its own low voltage signal. It is located the
exhaust system and monitors the amount of oxygen in
the exhaust stream and provides feedback to the
Engine Control Module (ECM).

The electrically heated oxygen sensor warms up quickly
and remains hot, even at idle when the exhaust manifold
may cool down.

The ECM applies a reference voltage of 450 mv to the
oxygen sensor, the ECM compares this reference
voltage with the voltage generated by oxygen sensor.
The amount of voltage the oxygen sensor generates is
proportionate to the difference between the amount of
oxygen in the outside air and the exhaust gases. The
atmosphere contains about 21% oxygen. The exhaust
from a rich air/fuel ratio contains almost no oxygen.
With a large difference betweenthe amounts of oxygen
containing the two surface, the sensor generates less
voltage.

YAD1F580

When the exhaust gas is rich (below 14.7:1), the voltage
output is high, above 450 mv. When the exhaust gas
is lean (above 14.7:1 air/fuel ratio), the sensor’s
voltage output is low, below 450 mv.

The ECM uses oxygen sensor information for:

•

Open loop / closed loop criteria

•

Ideal air / fuel ratio