1999 AUDI A4 APB Engine Motronic Syst

01-79

Actuating Secondary Air Injection (AIR)
Solenoid Valve -N112

Note:
Only vehicles with automatic transmission are
equipped with a secondary air injection system.
Vehicles with manual transmission do not have a
secondary air injection system. For this reason
are on vehicles with manual transmission the
following components Secondary Air Injection
(AIR) Solenoid Valve -N112 and Secondary Air
Injection (AIR) Pump Relay -J299 not displayed.

-
Press button.Output Diagnostic Test Mode Secondar
y Air
(AIR
) Injection valve -N112

Indicated on display
This solenoid valve will continue to be actuated (i.e. will click) until the
button is pressed to advance the program to the next control element.
If the secondary air injection valve does not click:
Repair Manual, 2.7 Liter V6 5V BiTurbo Engine Mechanical, Engine Code(s): APB, Repair Group 26, Checking secondary air injection valve

- Check Secondary Air Injection (AIR) Solenoid Valve -N112
Pa
ge 97 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

01-80

Actuating Secondary Air Injection (AIR) Pump
Relay -J299

Note:
Only vehicles with automatic transmission are
equipped with a secondary air injection system.
Vehicles with manual transmission do not have a
secondary air injection system. For this reason is
on vehicles with manual transmission the
following component Secondary Air Injection
(AIR) Pump Relay -J299 not displayed.

-
Press button.Output Diagnostic Test Mode Secondar
y air pump rela
y -J299

Indicated on display
If the Secondary Air Injection (AIR) Pump Motor -V101- does not run at
intervals:
Repair Manual, 2.7 Liter V6 5V BiTurbo Engine Mechanical, Engine Code(s): APB, Repair Group 26, Checking Secondary Air Injection (AIR) Pump Relay
-J299
The Secondary Air Injection (AIR) Pump Relay -J299- activates the
Secondary Air Injection (AIR) Pump Motor -V101-, which runs for
approx: 1 minute at intervals.
- Check Secondary Air Injection (AIR) Pump Relay -J299.
Pa
ge 98 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

01-81

Activating Wastegate Bypass Regulator Valve
-N75-

-
Press button.Output Diagnostic Test Mode Wastegate bypass regulator valve -N75

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 Wastgate Bypass Regulator Valve
-N75

Actuating camshaft adjustment valves -N205-, -N208-
-
Press button.
Output Diagnostic Test Mode Camshaft Ad
justment

Indicated on display
If camshaft adjustment valve 1 or 2 is not activated:
Repair Manual, 2.7 Liter V6 5V BiTurbo Engine Mechanical, Engine Code(s): APB, Repair Group 15, Camshaft adjustment, checking camshaft adjustment valves
- Camshaft adjustment valves 1 and 2 (-N205 and -N208) will continue
to be activated (or will click) for about 1 minute.
Pa
ge 99 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

01-82

Actuating Leak Detection Pump (LDP) -V144-

-
Press button.Output Diagnostic Test Mode EVAP s
ystem leak detection pump

Indicated on display
The change over valve in the LDP is activated for approximately 1 minute
(clicks), unless the button pressed to switch to the next actuator.
Note:
The clicking can be heard by listening in the area of the left rear wheel
housing.
If valve is not actuated (does not click):
Repair Manual, Fuel Supply System, Repair Group 20, Components of EVAP system servicing, Checking Leak Detection Pump (LDP)
-V144

Pa
ge 100 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

01-83

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