relay AUDI A4 1999 B5 / 1.G ATW Engine Output Diagnostic Test Mode Workshop Manual

01-50
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 Leak Detection Pump (LDP) tank ventilation
system
6 Recirculating valve for turbocharger -N249-
7 Cylinder 1 fuel injector -N30-
8 Cylinder 3 fuel injector -N32-
9 Cylinder 4 fuel injector -N33-
10 Cylinder 2 fuel injector -N31-

Test requirement:

Fuses for engine electronics OK

Pa
ge 2 of 12 Out
put Dia
gnostic Test Mode
(DTM
) (function 03
)
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU06.01.4

01-51

Test sequence

- Connect VAS5051 tester or VAG1551 scan tool
and select control module for engine electronics
using "address word" 01 Page 01
-10
. Ignition
must remain switched on.
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 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
-56
. - Confirm input using -Q- button.
Pa
ge 4 of 12 Out
put Dia
gnostic Test Mode
(DTM
) (function 03
)
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU06.01.4

01-53

Activating the Secondary Air Injection (AIR)
pump relay

-
Press button.Output Diagnostic Test Mode (DTM) Secondary Air Injection pump relay

Indicated on display
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): AEB, ATW, Repair Group 26; Checking Secondary Air Injection (AIR) system

Activating wastegate bypass regulator valve -N75-
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 for
approx. 1 minute and off in intervals unless the next actuator is
selected first by pressing the button.
- Check Secondary Air Injection (AIR) pump relay -J299-:-
Press button.
Output Diagnostic Test Mode (DTM) Waste
gate b
ypass re
gulator valve -N75-

Indicated on display
This valve is activated for approx. 1 minute (clicks), unless button is
pressed first to switch to the next actuator.
Pa
ge 6 of 12 Out
put Dia
gnostic Test Mode
(DTM
) (function 03
)
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU06.01.4