1996 AUDI A4 fuel

26-36


Electrical Wiring Diagrams, Troubleshooting & Component Locations
Repair Manual, Fuel Supply System, Repair Group 20

Checking activation
Check wire connection from terminal 1 of connector via fuse S234 (in
fuse holder, socket 34) to Fuel Pump (FP) relay for open circuit: Check Fuel Pump (FP) relay

- Connect VAG1527B voltage tester between terminals 1 and 2 using
test leads from VAG1594A.
- Connect VAG1551 scan tool.
- Initiate output Diagnostic Test Mode (DTM) and activate Secondary Air
Injection (AIR) solenoid valve -N112-.
Output Diagnostic Test Mode Secondary Air Inj. Solenoid Valve -N112

Indicated on display

LED must blink.
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11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
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26-39
Installation location:

Repair Manual, 1.8 Liter 4-Cyl. 5V Turbo Fuel
Injection & Ignition, Repair Group 24
- Initiate output Diagnostic Test Mode (DTM) and
activate Secondary Air Injection (AIR) pump
relay -J299-.

A - If relay does not trigger:
B - If relay triggers, but Secondary Air Injection (AIR) pump does not run:
The Secondary Air Injection (AIR) pump relay (in 3-socket relay
carrier in the E-box, at left in plenum chamber, position 2) must
trigger and the Secondary Air Injection (AIR) pump motor -V101-
must run in intervals
- Check voltage supply of Secondary Air Injection (AIR) relay Page
26
-40
.
- Checking activation of Secondary Air Injection (AIR) relay Page 26
-
42
.
- Check voltage supply for Secondary Air Injection (AIR) pump Page
26
-43
.
Pa
ge 11 of 16 Secondar
y air s
ystem, checkin
g (en
gine code ATW
)
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE02.26.2

26-41


If specified value is not obtained: - Connect multimeter for voltage measurement as follows.3-socket relay carrier in E-box, plenum
chamber, position 2
terminal
Measure to

4 Engine Ground
(GND)
- Operate starter briefly.

Specified value: approx. battery voltage
- Perform the following tests marked with dots:

Electrical Wiring Diagrams, Troubleshooting & Component Locations Check fuse S234 (in fuse holder, position 34). Check wire connection from Secondary Air Injection (AIR) pump relay
-J299- (in 3-socket relay carrier in E-box, plenum chamber) via fuse
S234 (in fuse holder, position 34) to Fuel Pump (FP) relay for open
circuit:
Pa
ge 13 of 16 Secondar
y air s
ystem, checkin
g (en
gine code ATW
)
11/18/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE02.26.2