SsangYong Stavic / SsangYong Rodius (2005 year). Manual - part 196

DI10-179

CHANGED BY

EFFECTIVE DATE

AFFECTED VIN

DIAGNOSIS

DI ENG SM - 2004.9

FUEL SYSTEM DIAGNOSIS

FUEL SYSTEM DIAGNOSIS ................................... DI10-180

Overview ............................................................. DI10-180

Fuel pressure system ......................................... DI10-181

Fuel system pressure test .................................. DI10-184

Fuel system check process ................................ DI10-186

PRESSURE LEAKAGE TEST WITH SCAN-100 ...... DI10-195

DI10-180

CHANGED BY

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AFFECTED VIN

DIAGNOSIS

DI ENG SM - 2004.9

OVERVIEW

When the Diagnostic Trouble Code (DTC) is detected through scan tool, it’s necessary to check the transfer and high
pressure fuel lines in fuel system before replacing the components.

If the trouble continues even after the trouble has been fixed with scan tool, must perform the fuel pressure test.

Below schematic diagram shows the specifications of pressure, flow mass and temperature in fuel system.

FUEL SYSTEM DIAGNOSIS

Transfer fuel

pressure regulator

Pressure limit valve

(High pressure line)

Transfer pump

Supply

valve

Suction

valve

High pressure

p u m p

Up to

1050 bar

Common rail

Injectors

Fuel tank

Priming pump

Fuel filter

Venturi

Below 2 bar

Below -0.3 bar

-0.6 ~ 0.1 bar

High pressure fuel
supply line
Transfer fuel supply line

Return line

IMV

-0.6 ~ 0.1 bar

0.05 ~ 0.1 bar

DI10-181

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EFFECTIVE DATE

AFFECTED VIN

DIAGNOSIS

DI ENG SM - 2004.9

FUEL PRESSURE SYSTEM

Pressure/Volume Consumption in System

Pressure/Volume Displacement from Pump

Injector back
leak volume

Fuel injection
volume

Pump capacity for

supplying the required

target pressure/volume

Conservation of fuel pressure/
volume (rail) for proper system
operation

DI10-182

CHANGED BY

EFFECTIVE DATE

AFFECTED VIN

DIAGNOSIS

DI ENG SM - 2004.9

Example of Too Much Injector Back leak

Too Much Injector Back leak

When the injector cannot be sealed due to entering the foreign materials

Example:

• Foreign materials in fuel

• Burnt out or worn high pressure pump

• Mechanical damage in inside of injector

Increased injector back leak volume

Pressure/volume loss

Pump capacity

Pressure/volume

build up

Pressure/volume

consumption

Fuel injection

volume

Injector back
leak volume