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
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