SsangYong Korando III (2010 year). Service manual — part 331

03-16

(6) Low Pressure System Pressure Test

Inspection procedure

▶

All wirings/connectors and fuel lines should be

connected and the engine should work

properly.

Prepare a special tool for low pressure test

and clean it thoroughly to prevent foreign

materials from entering.

1.

2.

Disconnect the key connector for fuel filter connection, and connect both connectors to the fuel filter

and hose.

3.

Start the engine and check visually for clogged low pressure fuel system, excessive air or air entry.

If the fuel flow is not sufficient or air is in the fuel, repair the leak area.

4.

5.

03-17

0000-00

Static test for backleak of injector

▶

Disconnect the injector return hose and cover

the openings with caps shaped screw (included

in the special tool).

1.

Connect the hose of the container for

measuring backleak to the return nipple of the

injector.

(prevent air entry to the low pressure line)

2.

Disconnect the IMV connector of the high

pressure pump and then fuel pressure

sensor connector.

3.

The connector of the injector can be easily

contaminated. Always keep it clean.

Crank the engine for 5 seconds.

Check the flow volume of injector backleak.

4.

5.

If the value is out of the specified range,

replace the injector.

Flow volume of injector

backleak

below 20 cm

03-18

Dynamic test for backleak of injector

▶

Warm up the engine so that the engine
coolant temperature be over 80℃ and star

the engine again.

Disconnect the injector return hose and cover

the openings with caps shaped screw

(included in the special tool).

1.

2.

Connect the hose of the container for

measuring backleak to the return nipple of

the injector.

Start the engine again and let the engine

idle for 30 seconds.

Perform backleak test of fuel system with a

diagnostic device after 30 seconds.

3.

4.

5.

This test consists of 4 cycles, and the engine rpm

reaches 3,500 rpm for 18 seconds in each cycle.

Check the amount of backleak collected into

the container and confirm that it is within the

specified range.

6.

Specification

38 ml or less

03-19

0000-00

Pressure leak test in fuel system with scan tool

▶

When the dynamic test for injector backleak is performed, this test should be done together with it.

However, you can check the pressure leak from the fuel system only with this test.
To do this test, the coolant temperature should be over 60˚C. Check the conditions of sensors

and components in fuel system with scan tool.

Perform the diagnostic test as follows:

1.

2.

3.

Select the "Vehicle Model" and go to "Diagnosis Mode".

Select "Pressure Leak Test in Fuel System" in "Diagnosis Menu".

If the conditions are OK, press "Start".

-

-

-

The pressure leak test procedure is performed in 4 cycles. The engine speed goes up to

3,500 rpm and down again four times for 18 seconds. If the system is OK, the "System OK"

message will be displayed.