ignition AUDI A6 1998 C5 / 2.G ATQ Engine Output Diagnostic Test Mode Workshop Manual

01-56


Output Diagnostic Test Mode
(DTM) (function 03)

Notes:

Output Diagnostic Test Mode (DTM) is only
possible with engine idle and ignition switched
on.
Output Diagnostic Test Mode (DTM) is aborted
if engine is started or an RPM signal is
recognized.
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.
The electric Fuel Pump (FP) runs during all of
output Diagnostic Test Mode (DTM).
Engine must be started before repeating output
Diagnostic Test Mode (DTM). (ECM must
recognize an engine speed of above 300 RPM).
Pa
ge 1 of 12 Out
put Dia
gnostic Test Mode
(DTM
) (function 03
)
11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU05.01.3

01-58

Test requirement:

Fuses for engine electronics OK

Test sequence

- Connect VAS5051 tester or VAG1551 scan tool
and select the control module for engine
electronics using "address word" 01 Page 01
-
9 .

Ignition must remain switched on for this.Rapid data transfer
HELP
Select function XX

When indicated on display:
- Press buttons -0- and -3- to select "output Diagnostic Test Mode" and
press -Q- button to confirm input.
Rapid data transfer
Q
03-Output Dia
gnostic Test Mode

Indicated on display:
Activating the EVAP canister purge regulator valve (tank vent valve)
Note:
The Fuel Pump (FP) relay must trigger, the Fuel Pump (FP) must run,
flowing noise at fuel pressure regulator is clearly audible. If Fuel Pump
(FP) does not run, check activation Page 24
-52
. - Confirm input using the -Q- button.
Pa
ge 3 of 12 Out
put Dia
gnostic Test Mode
(DTM
) (function 03
)
11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU05.01.3

01-62

Note:
The click can be heard by listening near the rear
left wheelhousing.
If valve is not activated (does not click):

Repair Manual, Fuel Supply System, Repair
Group 20; components of the EVAP canister system, servicing; Leak Detection Pump (LDP)
-
V144
-, checking.


Activating fuel injectors

Note:
Fuel injectors are activated according to ignition
sequence: Cyl. 1, Cyl. 4, Cyl. 3, Cyl 6 Cyl. 2, Cyl
5.

-
Press button.Output Diagnostic Test Mode Cyl. 1 fuel injector -N30

Indicated on display:
-
Press button.
Output Diagnostic Test Mode Cyl. 1 fuel in
jector -N30

Indicated on display:
Fuel injector must click 5 times after arrow button is pressed.
Pa
ge 8 of 12 Out
put Dia
gnostic Test Mode
(DTM
) (function 03
)
11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU05.01.3

01-65

-
Press button.Output Diagnostic Test Mode Cyl. 5 fuel injector -N83

Indicated on display:
-
Press button.
Output Diagnostic Test Mode Cyl. 5 fuel in
jector -N83

Indicated on display:
If injector does not click: Fuel injector must click 5 times after arrow button is pressed.
- Check fuel injectors Page 24
-36
.
Output Diagnostic Test Mode END

Indicated on display:
-
Press button.
Rapid data transfer
HELP
Select function XX

Indicated on display (function selection):
Note:
Before re-initiating output Diagnostic Test Mode (DTM), engine must be
started and the ignition must be switched off and on again.
Pa
ge 12 of 12 Out
put Dia
gnostic Test Mode
(DTM
) (function 03
)
11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU05.01.3