fuel pump 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

01-54

Activating the EVAP canister purge regulator
valve (tank ventilation 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
-55
.

Display on VAS5051:
If valve is not activated (does not click): A - 1. Actuator in test
1 - EVAP canister purge regulator valve -N80-
This valve is activated for approx. 1 minute (clicks), unless
button is pressed first to switch to the next actuator.
- Check Evaporative Emission (EVAP) canister purge regulator valve -
N80- Page 24
-114
.
Pa
ge 5 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