ECO mode AUDI A4 1999 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

01-52
Output Diagnostic Test Mode (DTM) activates
the following components in the specified
sequence:

Activation sequence
1 Evaporative Emission (EVAP) canister purge
regulator valve -N80-
2 Secondary Air Injection (AIR) solenoid valve
-N112-
3 Secondary Air Injection (AIR) pump relay -
J299-
4 Wastegate bypass regulator valve -N75-
5 Camshaft adjustment
6 Leak Detection Pump (LDP) tank ventilation
system
7 Recirculating valve for turbocharger -N249-
8 Cylinder 1 fuel injector -N30-
9 Cylinder 3 fuel injector -N32-
10 Cylinder 4 fuel injector -N33-
11 Cylinder 2 fuel injector -N31-
12
Brake system vacuum pump
1)

1) Only vehicles with automatic transmission

Test requirement:
Pa
ge 2 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