air condition AUDI A4 1998 B5 / 1.G AEB Engine Ignition Coil System Checking

28-17


Individual ignition coil system,
checking

Ignition coils, checking


Notes:

Measuring the primary resistance of the ignition
coils is normally not necessary for this test
(primary resistance approx. 0.4 to 0.6 ,
measured between coil terminals 1 and 15).

A high tension isolation diode is installed in the
secondary circuit of the ignition coil. Measuring
the resistance of the secondary coil is therefore
not possible with conventional measuring
instruments.

Required special tools and test equipment
Multimeter US 1119 (Fluke 83 or equivalent)
VW 1594 connector test kit

Test conditions
No fuel injector malfunction stored in DTC
memory
Pa
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gnition coil s
ystem, checkin
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11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
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e=re
pair&id=AUDI.B5.FU02.28.2

28-19

Wiring for primary coil and power
supply, checking


Required special tools and test equipment

VAG 1527B LED voltage tester
VW 1594 connector test kit
Wiring diagrams

Test conditions
Fuse for ignition coils OK

Checking

- Disconnect 4-pin harness connector from power
output stage.

- Switch ignition on.

Note: - Connect VAG 1527B LED voltage tester in turn between 4-pin
connector terminals 1, 2, 3 and 4, and engine ground.
LED must light up for all 4 terminals
Pa
ge 5 of 11 Individual i
gnition coil s
ystem, checkin
g
11/19/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU02.28.2