remote control AUDI A4 1996 B5 / 1.G Fuel Supply System Front Wheel Drive 1.8T And 2.8 Workshop Manual

20-31

Fuel pump, electrical checking


Vehicles with front wheel drive and 1.8 ltr.
turbo or 2.8 ltr. engine

Required special tools, testing equipment
and auxiliary equipment

VAG1348/3A Remote control using
VAG1348/3-2 adaptor cable
Fluke 83 multimeter
VW 1594 Adaptor kit
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11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
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20-33

Test sequence

- Open fuse box cover on left side of instrument
panel.

- Pull fuse 28 from fuse holder (left row, 5Th fuse
from top)

Note:
The fuel pump runs very quietly. Avoid ambient background noise as
much as possible during fuel pump checks.
If running noise not audible - Connect VAG1348/3A remote control on right side of fuse holder 28
using VAG1348/3-2 adaptor wire -arrow-.
- Connect test lead to Battery +.
- Press remote control switch.
Fuel pump running noise must be audible
- Remove connector flange cover under luggage compartment trim.

- Unlatch and disconnect 4-pin harness connector -1-.
Pa
ge 29 of 49 Fuel su
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ly system, servicin
g (vehicles with front wheel drive and 1.8 ltr. turbo or 2.8 ltr. en
gine
)
11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE04.20.2

20-34


If specified value obtained but no running noise audible from pump
WARNING!
Fuel system is under pressure! Before opening, place clean cloths
around the connections to be opened. Carefully loosen the
connections to relieve pressure. - Switch Fluke 83 multimeter to 20 Volt range and connect to terminal 1
(green/yellow) and 4 (brown) of harness connector using jumper wires
from VW 1594 Adaptor kit.
- Press remote control switch continuously while reading Voltage.
Specified value: approx. Battery Voltage.
- Remove cover flange as follows:

- Mark supply line -2- and return line -3- and remove from cover flange.
Pa
ge 30 of 49 Fuel su
pp
ly system, servicin
g (vehicles with front wheel drive and 1.8 ltr. turbo or 2.8 ltr. en
gine
)
11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE04.20.2

20-36

Fuel pump delivery volume, checking


Vehicles with front wheel drive and 1.8 ltr.
turbo or 2.8 ltr. engine

Required special tools, testing equipment
and auxiliary equipment

VAG1348/3A Remote control using
VAG1348/3-2 adaptor cable
Calibrated measuring container

Checking requirements
Battery Voltage: 12 Volts minimum
Fuel filter OK
Ignition switched OFF.
Pa
ge 32 of 49 Fuel su
pp
ly system, servicin
g (vehicles with front wheel drive and 1.8 ltr. turbo or 2.8 ltr. en
gine
)
11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE04.20.2

20-37

Test sequence

- Open fuse box cover on left side of instrument
panel.

- Remove fuse 28 from fuse holder (left row, 5Th
fuse from top).

- Connect remote control to right side of fuse 28 holder using adaptor
cable -arrow-.
- Connect tester lead to Battery +.
- Remove fuel filler cap.
- Remove engine cover.
Pa
ge 33 of 49 Fuel su
pp
ly system, servicin
g (vehicles with front wheel drive and 1.8 ltr. turbo or 2.8 ltr. en
gine
)
11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
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e=re
pair&id=AUDI.B5.GE04.20.2

20-39

All vehicles

- Operate remote control for 15 seconds.

Press remote button continuously

*) Minimum supply quantity cm
3/15 s
**)
Voltage on fuel pump with engine off and pump running (approx. 2
Volts less than Battery Voltage). - Compare fuel quantity pumped to specified value.
Pa
ge 35 of 49 Fuel su
pp
ly system, servicin
g (vehicles with front wheel drive and 1.8 ltr. turbo or 2.8 ltr. en
gine
)
11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE04.20.2