fuel AUDI A4 1999 B5 / 1.G APB Engine Motronic Syst

01-83

Activating Recirculating valve for
turbocharger -N249

-
Press button.Output Diagnostic Test Mode Recirculating valve for turbocharg -N249

Indicated on display
This solenoid valve is activated for 1 minute (clicks), unless button is
pressed first to switch to the next actuator.
If valve is not activated (does not click):
Repair Manual, 2.7 Liter V6 5V BiTurbo Engine Mechanical, Engine Code(s): APB, Repair Group 21, Turbocharger, Checking Recirculating valve for turbocharger
-N249

Actuating fuel injectors
Note:
The fuel injectors are activated in firing order that means Cyl.1, Cyl.4,
Cyl.3, Cyl.6, Cyl.2, Cyl,5
-
Press button.
Output Diagnostic Test Mode Cylinder 1 fuel injectors -N30

Indicated on display
After pressing button, fuel injector must click five times. -
Press button.
Pa
ge 101 of 166 Motronic s
ystem, On Board Dia
gnostic
(OBD
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU04.01.1

01-84
If the fuel injector does not click:

- Check fuel injectors Page 24
-39
.

-
Press button.Output Diagnostic Test Mode Cylinder 4 fuel in
jectors -N33

Indicated on display
-
Press button.
Output Diagnostic Test Mode Cylinder 4 fuel injectors -N33

Indicated on display
After pressing arrow button, fuel injector must click five times.
If the fuel injector does not click:
- Check fuel injectors Page 24
-39
.
Pa
ge 102 of 166 Motronic s
ystem, On Board Dia
gnostic
(OBD
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU04.01.1

01-85

-
Press button.Output Diagnostic Test Mode Cylinder 3 fuel injectors -N32

Indicated on display
-
Press button.
Output Diagnostic Test Mode Cylinder 3 fuel in
jectors -N32

Indicated on display
After pressing button, fuel injector must click five times.
If the fuel injector does not click: - Check fuel injectors Page 24
-39
.
-
Press button.
Output Diagnostic Test Mode Cylinder 6 fuel in
jectors -N84

Indicated on display
-
Press button.
Output Diagnostic Test Mode Cylinder 6 fuel injectors -N84

Indicated on display
After pressing button, fuel injector must click five times.
If the fuel injector does not click: - Check fuel injectors Page 24
-39
.
-
Press button.
Pa
ge 103 of 166 Motronic s
ystem, On Board Dia
gnostic
(OBD
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU04.01.1

01-86

Output Diagnostic Test Mode Cylinder 2 fuel in
jectors -N31

Indicated on display
-
Press button.
Output Diagnostic Test Mode Cylinder 2 fuel in
jectors -N31

Indicated on display
After pressing button, fuel injector must click five times.
If the fuel injector does not click: - Check fuel injectors Page 24
-39
.
-
Press button.
Output Diagnostic Test Mode Cylinder 5 fuel injectors -N83

Indicated on display
After pressing button, fuel injector must click five times. -
Press button.
Output Diagnostic Test Mode Cylinder 5 fuel in
jectors -N83

Indicated on display
If the fuel injector does not click:
- Check fuel injectors Page 24
-39
.
-
Press button.
Pa
ge 104 of 166 Motronic s
ystem, On Board Dia
gnostic
(OBD
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU04.01.1

01-113

System in Basic Setting 71
1
2
3
4

When indicated on display
During test is "Test ON" displayed in display field 4. Continue to hold test
conditions until a diagnostic result is displayed in display field 4.
Note: - Check specified value in display field 4:
Test duration for tank leak test takes approximately 60 seconds.Should the diagnosis be repeated several times, open fuel filler cap
each time to release pressure in tank.
Pa
ge 137 of 166 Motronic s
ystem, On Board Dia
gnostic
(OBD
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU04.01.1

01-115
If specified value in display field "System OK" is
reached:

- Press -C- button.

Work step 6: Diagnosis of fuel supply system

Test requirements

Engine at idle
Oxygen sensor control active
System in Basic S
ystem
Q
Input display group number XXX

When indicated on display
- Press buttons -1-, -0- and -7- to select display group number 107 and
confirm with -Q- button.
System in Basic Setting 107
1
2
3
4

When indicated on display
Note:
If display "Test ON" does not appear in the display field, switch the engine
off and restart afterward and repeat work step 6. (Diagnostic of fuel supply
system)
After the engine has been started it might be necessary to select "Address
word 01" and initiate the function "04 Basic Setting" again. - Check specified values in display field 4.
Pa
ge 139 of 166 Motronic s
ystem, On Board Dia
gnostic
(OBD
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU04.01.1

01-116


Display fields

1 2 3 4
Display group 107: Diagnostic of fuel supply
Display xxx /RPM x.x % x.x %
Test ON
Indicated Engine speed
(actual) Oxygen sensor control
average value (Bank 1) Oxygen sensor control
average value (Bank 2) Diagnostic condition
Work
range min.: 750 /RPM
max.:
6800 /RPM min.: -25.0 %
max.: 25.0 % min.: -25.0 %
max.: 25.0 % Test OFF
Test ON
Syst. OK
Syst. n OK
Value 750 - 850/RPM -18.0 % to 12.0 % -18.0 % to 12.0 % Syst. OK
Note

If "Syst. n OK" appears, check
DTC memory Page 01
-15
.
Pa
ge 140 of 166 Motronic s
ystem, On Board Dia
gnostic
(OBD
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU04.01.1