light AUDI A4 1998 B5 / 1.G ATQ Engine Ignition System Checking Workshop Manual

28-10

Checking Ground (GND) supply of power
output stage

If LED does not light up:
Electrical Wiring Diagrams, Troubleshooting & Component Locations
binder - Connect VAG1527B voltage tester as follows:Harness connector
Terminal
Measure to
2 B+

LED must light up.
- Check the wire connection for open circuit:
- Repair open circuit if necessary.
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11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
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28-11

Checking voltage supply to ignition coils

Note:
Voltage is supplied to ignition coils via Fuel
Pump (FP) relay.

Test requirement:

Fuse for ignition coils OK

Electrical Wiring Diagrams, Troubleshooting &
Component Locations binder

If LED does not light up: - Connect VAG1527B voltage tester as follows:Harness connector
Terminal
Measure to
1 Engine Ground (GND)
- Operate starter.

LED must light up.
- Check the wire connection for open circuit:
Pa
ge 13 of 65 I
gnition s
ystem, checkin
g
11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU05.28.1