SsangYong Rexton. Service manual - part 55

DI04-33

CHANGED BY

EFFECTIVE DATE

AFFECTED VIN

EXHAUST SYSTEM

DI ENG SM - 2004.4

Operating Conditions

• Engine is running

• Engine RPM is within a specified range. (EGR OFF under high RPM range)

• Engine torque is within a specified range. (EGR OFF under high torque range)

• Vehicle speed is within a specified range. (EGR OFF under high speed range)

• Atmospheric pressure is within a specified range. (EGR OFF under high altitude and low atmospheric pressure)

• Coolant temperature is within a specified range. (EGR OFF under high or low temperature)

• EGR OFF under extended period of idling.

Control Logic

• Main map: EGR volume is controlled based on intake air volume

• Auxiliary map

- Coolant temperature (Coolant temperature sensor)

- Engine rpm (Crankshaft position sensor)

- Engine load (TPS): Detection of sharp acceleration

- Intake air temperature (HFM): Decreases when over 60°C

- Atmospheric pressure (Barometric sensor): Compensation of altitude

• Compensation value of auxiliary map will be increased/decreased based on main map then ECU calculates EGR

volume finally to regulate the vacuum duty that applies to the vacuum modulator to control EGR valve openings.

Shut-off Conditions

• Engine rpm: over 2,950 rpm

• Vehicle speed: over 105 km/h

• Coolant temperature: over 100°C or below 10°C

• Idle period: over 50 seconds

DI04-34

CHANGED BY

EFFECTIVE DATE

AFFECTED VIN

EXHAUST SYSTEM

DI ENG SM - 2004.4

Y220_04035

Y220_04034

Y220_04033

Y220_04036

EGR Valve and Pipe
- Removal and Installation

1. Remove the vacuum hose from the EGR valve.

2. Unscrew the bolts and remove the EGR valve (2), EGR

valve #1 pipe (1) and gasket.

3. Remove the EGR valve #1 pipe, #2 pipe, #3 pipe and

gaskets from the engine.

4. Install in the reverse order of removal.

Notice

• Make sure to observe the specified tightening

torques.

• Never reuse the EGR #1 pipe (intake) and #3 pipe

(exhaust) once removed.

• Replace the gaskets with new ones.

Tightening torque

25 

± 2.5 Nm

Tightening torque

25 

± 2.5 Nm

EGR #3 pipe (LH)

EGR center pipe

EGR #1 pipe (RH)

DI04-35

CHANGED BY

EFFECTIVE DATE

AFFECTED VIN

EXHAUST SYSTEM

DI ENG SM - 2004.4

Y220_04038

Y220_04037

Vacuum Modulator
- Removal and Installation

1. Remove the vacuum hose from the vacuum modulator.

2. Remove the vacuum modulator from the bracket.

3. Install in the reverse order of removal.

Tightening torque

10 

± 1.0 Nm

Notice

Make sure that the vacuum hoses are connected to
correct locations.

DI04-36

CHANGED BY

EFFECTIVE DATE

AFFECTED VIN

EXHAUST SYSTEM

DI ENG SM - 2004.4

Y220_04039

EXHAUST SYSTEM AND MUFFLER

MUFFLER

The muffler is located at the middle of the exhaust pipe and reduces the pulse noise and the tail pipe noise by eliminating
the flowing resistance from the exhaust gas.

The important elements of the muffler are volume, construction and location.

(1) #1 Pipe (turbo charger side)

(3) Muffler

(2) DOC (Diesel Oxidation Catalyst)

Hanger

Muffler

(4) Tail pipe