Daewoo Musso. Manual - part 167

1F2-28  M161 ENGINE CONTROLS

FUEL PRESSURE AND INTERNAL LEAKAGE TEST

01 Pressure Tester
02 Pressure Hose
03 Measuring Beaker

Preparation

Connection of the Equipment

1. Turn the ignition switch to "OFF" position.

2. Remove the air cleaner cross pipe.

3. Remove the cap on fuel pressure test plug and connect the

pressure hose and pressure tester.

4. Prepare the beaker for measuring the amount of fuel.

Tools Required

103 589 00 21 00  Pressure Tester

119 589 04  63 00  Pressure Hose

M161 ENGINE CONTROLS  1F2-29

Failure

code

Item

Checking method

Test

step

Requirement

Specified

value

Possible cause

3.2 - 3.6 bar

·

·

·

·

·

 Fuel

pressure:in

idling speed

- When the

vacuum is

applied

·

 Engine:in idling

- Colse the valve

screw on pressure

tester

Þ 

1.0

Connect the fuel

pressure test plug to

the pressure tester

(refer to the flgure on

previous page).

·

 

Þ 

Fuel pump test

·

 Fuel pressure

regulator

3.7 - 4.2 bar

·

·

·

·

·

 Fuel

pressure:in

idling speed

- When the

vacuum is

not applied

·

 Engine:in idling

- Colse the valve

screw on pressure

tester

Þ 

2.0

Connect the fuel

pressure test plug to

the pressure tester

(refer to the flgure on

previous page).

·

 

Þ 

Fuel pump test

·

 Fuel pressure

regulator

> 3.0 bar

·

·

·

·

·

 Fuel system

internal

leakage:

·

 Engine:stop

Þ 

3.0

Connect the fuel

pressure test plug to

the pressure tester

(refer to the flgure on

previous page).

·

 The pressure drops

rapidly:non-return

valve in fuel pump

> 2.5 bar

·

 After 30 minutes

from engine stop

·

 The pressure

drops slowly:

- Injector test

- Fuel pressure

regulator

- O-ring

1F2-30  M161 ENGINE CONTROLS

FUEL PUMP TEST

Preparation

1 ECU
2 Test Coupling(No.1-60)
3 Test Coupling(No.61-120)
4 Stop Watch
5 Measuring Beaker

Connection of the Equipment

1. Turn the ignition switch to "OFF" position.

2. Connect the test box to the ECU.

03 Test Box
04 ECU Test Cable

Tools Required

103 589 00 21 00  Pressure Tester

210 589 00 99 00  Adaptor Line

129 589 00 21 00  Test Box

210 589 08 63 00  Ecu Test Cable

M161 ENGINE CONTROLS  1F2-31

Failure

code

Item

Checking method

Test

step

Requirement

Specified

value

Possible cause

1 liter of fuel

supply for

max. 35

seconds

·

·

·

·

·

 Fuel pump:

- Fuel supply

ratio

·

 Ignition:ON

- Disconnect the fuel

return pipe and

connect the host to

beaker to collect

the supplied fuel

Þ 

1.0

·

 

Þ 

2.0

·

 Fuel line

5 - 9 A

·

·

·

·

·

 Fuel pump:

- Current

consumption

·

 Ignition:ON

  - Remove the fuel

relay from the fuse

and relay box in

luggage

compartment and

connect the

amperemeter

between No.1 and

No.3 in relay

box(fuel pump relay

removed position)

for measuring

current

consumption

Þ 

2.0

·

 Fuel pump

5

33

Multi tester(DC current)

3

1