fuse diagram AUDI A4 1996 B5 / 1.G AWM Engine Secondary Air System Workshop Manual
Page 11 of 26
26-51
Checking power supply
Note:
The power supply for the secondary air injection
solenoid valve -N112- is via the fuel pump relay.
Test requirements:
Fuse for secondary air injection solenoid
valve OK.
Electrical Wiring Diagrams, Troubleshooting &
Component Locations binder
Fuel pump relay OK.
Repair Manual, 1.8 Liter 4
-Cyl. 5V Turbo Fuel
Injection & Ignition, Engine Code(s): AWM, Repair Group 24
- Disconnect connector from valve.
- Connect voltage tester VAG 1527 B as follows:Connector
Measure to
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Page 13 of 26
26-52
If the LED does not light up:
- Check wiring from contact 1 on the connector
via the fuse to the fuel pump relay for an open
circuit:
Electrical Wiring Diagrams, Troubleshooting &
Component Locations binder
- Repair open circuit, if necessary
If the LED lights up:
- Check actuation.
Checking actuation
- Connect voltage tester VAG 1527 B to contacts 1 (positive) and 2 of
connector.
- Initiate output Diagnostic Test Mode (DTM) and activate secondary air
injection solenoid valve -N112-.
LED must flash.
Pa
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p://127.0.0.1:8080/audi/servlet/Dis
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Page 18 of 26
26-57
- Check for open circuit in wiring from battery +
(terminal 30) to fuse S130 for secondary air
injection pump relay (in 3-position in E-box of
plenum chamber, position 2).
Electrical Wiring Diagrams, Troubleshooting &
Component Locations binder
If specified value is not attained: - Connect multimeter as follows to measure voltage.3-position relay carrier in E-box in plenum chamber,
position 2
contact
Measure to
4 Engine
Groung
- Operate starter briefly.
Specified value: approx. battery voltage
- Carry out following tests:
Electrical Wiring Diagrams, Troubleshooting & Component Locations
binder - Check fuse S234 (in fuse box, position 34).
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p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
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pair&id=AUDI.B5.GE06.26.2
Page 19 of 26
26-58
- Check for open circuit in wiring from
secondary air injection pump relay (in 3-
position relay carrier in E-box of plenum
chamber) via fuse S234 (in fuse box, position
34) to fuel pump relay.
Electrical Wiring Diagrams, Troubleshooting &
Component Locations binder
Check actuation of secondary air pump relay
- Switch ignition off.
- Remove secondary air injection pump relay.
- Connect voltage tester VAG 1527 B as follows:3-position relay carrier in E-box in plenum chamber,
position 2
contact
Measure to
6 Engine
Ground
- Initiate output Diagnostic Test Mode (DTM) and activate secondary air
injection pump relay.
LED must flash.
Pa
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ystem
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.GE06.26.2