engine AUDI A4 1996 B5 / 1.G AWM Engine Output Diagnostic Test Mode Workshop Manual

01-51


Output Diagnostic Test Mode
(DTM) (function 03)

Notes:

Output Diagnostic Test Mode (DTM) is only
possible with engine idle and ignition switched
on.
The electric Fuel Pump (FP) runs during all of
output Diagnostic Test Mode (DTM).
In output Diagnostic Test Mode (DTM),
individual actuators (with the exception of the
fuel injectors) are activated for approximately 1
minute unless the next actuator is selected
earlier by pressing the button.

Actuators are checked either acoustically or by
touch.
Output Diagnostic Test Mode (DTM) is aborted
if engine is started or an RPM signal is
recognized.
Before re-initiating output Diagnostic Test Mode
(DTM), engine must be started and the ignition
must be switched off and on again.
Pa
ge 1 of 16 Out
put Dia
gnostic Test Mode
(DTM
) (function 03
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU07.01.3

Fuses for engine electronics OK

Electrical Wiring Diagrams, Troubleshooting &
Component Locations
Pa
ge 3 of 16 Out
put Dia
gnostic Test Mode
(DTM
) (function 03
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU07.01.3

01-53

Test sequence

- Connect VAS5051 tester Page 01
-7 and
select vehicle system "01 - Engine electronics".
Ignition must remain switched on for this.

Display on VAS5051:
- In selection -1-, click on the diagnostic function "03 - On Board
Diagnostic (OBD)".
Pa
ge 4 of 16 Out
put Dia
gnostic Test Mode
(DTM
) (function 03
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU07.01.3

01-55

Activating the Secondary Air Injection (AIR)
solenoid valve

-
Press button

Display on VAS5051:
If valve is not activated (does not click):
Repair Manual, 1.8 Liter 4
-Cyl. 5V Turbo Engine Mechanical, Engine
Code(s): AWM, Repair Group 26; Checking Secondary Air Injection (AIR) system
A - 2. Actuator in testThis valve is activated for approx. 1 minute (clicks), unless
button is pressed first to switch to the next actuator.
- Check Secondary Air Injection (AIR) solenoid valve -N112-:
Pa
ge 6 of 16 Out
put Dia
gnostic Test Mode
(DTM
) (function 03
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU07.01.3

01-56

Activating the Secondary Air Injection (AIR)
pump relay

-
Press button

Display on VAS5051:
If the Secondary Air Injection (AIR) pump motor does not start up in
intervals:
Repair Manual, 1.8 Liter 4
-Cyl. 5V Turbo Engine Mechanical, Engine
Code(s): AWM, Repair Group 26; Checking Secondary Air Injection (AIR) system
A - 3. Actuator in test
3 - Secondary Air Injection (AIR) pump relay -J299-The Secondary Air Injection (AIR) pump relay -J299- (in 3-socket
relay carrier in the E-box, at left in the plenum chamber , position
2) switches the Secondary Air Injection (AIR) pump motor -V101-
on and off in intervals for approx. 1 minute unless the next
actuator is selected first by pressing the button.
- Check Secondary Air Injection (AIR) pump relay -J299-:
Pa
ge 7 of 16 Out
put Dia
gnostic Test Mode
(DTM
) (function 03
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU07.01.3

01-57

Activating wastegate bypass regulator valve -
N75-

-
Press button

Display on VAS5051:
If valve is not activated (does not click):
Repair Manual, 1.8 Liter 4
-Cyl. 5V Turbo Engine Mechanical, Engine
Code(s): AWM, Repair Group 21, Charge air system with turbocharger
A - 4. Actuator in test
4 - Wastegate bypass regulator valve -N75-
This valve is activated for approx. 1 minute (clicks), unless
button is pressed first to switch to the next actuator.
Pa
ge 8 of 16 Out
put Dia
gnostic Test Mode
(DTM
) (function 03
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU07.01.3

01-58

Activating camshaft adjustment valve

-
Press button

Display on VAS5051:
If valve is not activated (does not click):
Repair Manual, 1.8 Liter 4
-Cyl. 5V Turbo Engine Mechanical, Engine
Code(s): AWM, Repair Group 15; Checking camshaft adjustment
A - 5. Actuator in test
5 - Camshaft adjustment
This valve is activated for approx. 1 minute (clicks), unless
button is pressed first to switch to the next actuator.
- Check camshaft adjustment valve:
Pa
ge 9 of 16 Out
put Dia
gnostic Test Mode
(DTM
) (function 03
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU07.01.3

01-59

Activating Leak Detection Pump (diagnostic
pump for tank ventilation system)

-
Press button

Display on VAS5051:
Note:
The click can be heard by listening near the rear left wheelhousing.
If valve is not activated (does not click):
Repair Manual, 1.8 Liter 4
-Cyl. 5V Turbo Engine Mechanical, Engine
Code(s): AWM, Repair Group 20; components of the EVAP canister system, servicing; Leak Detection Pump (LDP)
-V144
-, checking.
A - 6. Actuator in test
6 - Leak Detection Pump (LDP) tank ventilation system
Th change-over valve in the LDP is activated for approximately 1
minute (clicks), unless button is pressed first to switch to the
next actuator.
Pa
ge 10 of 16 Out
put Dia
gnostic Test Mode
(DTM
) (function 03
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU07.01.3

01-60

Turbocharger boost pressure recirculation
valve, activating

-
Press button

Display on VAS5051:
If valve is not activated (does not click):
Repair Manual, 1.8 Liter 4
-Cyl. 5V Turbo Engine Mechanical, Engine
Code(s): AWM, Repair Group 21, Charge air system with turbocharger
A - 7. Actuator in test
7 - Recirculating valve for turbocharger -N249-
This valve is activated for approx. 1 minute (clicks), unless
button is pressed first to switch to the next actuator.
Pa
ge 11 of 16 Out
put Dia
gnostic Test Mode
(DTM
) (function 03
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU07.01.3

01-65

End Output Diagnostic Test Mode (DTM)

-
Press button

Display on VAS5051:
Note:
Before re-initiating output Diagnostic Test Mode (DTM), engine must be
started and the ignition must be switched off and on again. A - Actuator test has ended
-
End function "03 - output Diagnostic Test Mode (DTM)" by pressing
button.
Pa
ge 16 of 16 Out
put Dia
gnostic Test Mode
(DTM
) (function 03
)
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU07.01.3