engine AUDI A4 1998 B5 / 1.G Quattro Fuel Syst

20-88

Test sequence

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

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

- Connect VAG1348/3A remote control to right terminal of fuse 28 using
VAG1348/3-2 adaptor cable -arrow-.
- Connect tester clamp to Battery +.
- Remove fuel filler cap.
- Remove engine cover.
Pa
ge 37 of 55 Fuel su
pp
ly system, servicin
g (vehicles with all wheel drive and 1.8 ltr. turbo or 2.8 ltr. en
gine
)
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE04.20.3

20-89

WARNING!

Fuel system is under pressure! Before
opening, place clean cloths around the
connections to be opened. Carefully loosen
the connections to relieve pressure.

Vehicles with 1.8 ltr. turbo engine

Vehicles with 2.8 ltr. engine - Disconnect fuel return hose from connection on fuel distributor line.
- Connect auxiliary hose -arrow- to distributor line and place in a
measuring container.

- Disconnect fuel return hose from the hose connection on the fuel
distributor line.
- Connect auxiliary hose -arrow- to distributor line and place in a
measuring container.
Pa
ge 38 of 55 Fuel su
pp
ly system, servicin
g (vehicles with all wheel drive and 1.8 ltr. turbo or 2.8 ltr. en
gine
)
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE04.20.3

20-90

All vehicles

- Operate remote control for 15 seconds.

Keep button depressed continuously

*) Minimum supply quantity cm
3/15 s
**)
Voltage across fuel pump with engine off and pump running (approx. 2
Volts less than Battery Voltage). - Compare delivered quantity to specified value.
Pa
ge 39 of 55 Fuel su
pp
ly system, servicin
g (vehicles with all wheel drive and 1.8 ltr. turbo or 2.8 ltr. en
gine
)
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE04.20.3

20-91

Fuel supply unit, removing and
installing


Vehicles with all wheel drive and 1.8 ltr. turbo
or 2.8 ltr. engine
Observe Safety measures Page 20
-1 .
Observe Rules of cleanliness Page 20
-4 .

Required special tools, testing equipment
and auxiliary equipment

FM 3000 fuel cart (or equivalent)
3217 Union nut wrench
3307 fuel pump wrench
VAG1275 Hose clamp pliers
Pa
ge 40 of 55 Fuel su
pp
ly system, servicin
g (vehicles with all wheel drive and 1.8 ltr. turbo or 2.8 ltr. en
gine
)
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE04.20.3

20-99

Sender for fuel gauge -G, checking


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

Required special tools, testing equipment
and auxiliary equipment

Fluke 83 multimeter
VW 1594 Adaptor kit

- Remove connector flange cover under luggage
compartment trim.

- Unlatch and disconnect 4-pin harness connector -1-.
Pa
ge 48 of 55 Fuel su
pp
ly system, servicin
g (vehicles with all wheel drive and 1.8 ltr. turbo or 2.8 ltr. en
gine
)
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE04.20.3

20-101

Sender for fuel gauge -G, removing and
installing


Vehicles with all wheel drive and 1.8 ltr. turbo
or 2.8 ltr. engine
Observe Safety measures Page 20
-1 .
Observe Rules of cleanliness Page 20
-4 .

Removing

CAUTION!

Obtain the radio Anti-theft code from the
customer before disconnecting the Battery
Ground strap.

Note:
Fuel tank must not be filled higher than
1/3 maximum. - Disconnect Battery Ground strap with ignition switched OFF.
- Open fuel tank cover briefly and close again.
- If necessary, drain fuel tank using fuel cart Page 20
-66
.
Fuel supply unit, removing Page 20
-91
.
Pa
ge 50 of 55 Fuel su
pp
ly system, servicin
g (vehicles with all wheel drive and 1.8 ltr. turbo or 2.8 ltr. en
gine
)
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE04.20.3

20-104


Fuel pump, removing and installing

Vehicles with all wheel drive and 1.8 ltr. turbo or
2.8 ltr. engine
Observe Safety measures Page 20
-1 .
Observe Rules of cleanliness Page 20-4 .
Note:
The following steps describe fuel pump
installation. Removal is the reverse of the
installation steps.
Fuel pump lines -1- may not be kinked. Replace
kinked fuel lines and immediately dispose of old
parts.
- Replace O-ring -3-.
- Install fuel supply unit Page 20
-91
.
- Install sender for fuel gauge Page 20
-101
.
Pa
ge 53 of 55 Fuel su
pp
ly system, servicin
g (vehicles with all wheel drive and 1.8 ltr. turbo or 2.8 ltr. en
gine
)
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE04.20.3