1998 AUDI A3 check oil

28-14

Note:
The motronic Engine Control Module (ECM)
power supply relay -J271- supplies voltage to the
ignition coils with power output stages and the
Engine Control Module (ECM) at pin 121.

Test requirement:

Fuses for engine electronics OK

Electrical Wiring Diagrams, Troubleshooting &
Component Locations

Test sequence

- Remove engine cover (arrows).

- Disconnect 4-pin harness connector -1- at one of ignition coils -2-.
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28-17


If wire connection is OK: - Check following connection for open circuit according to wiring
diagram: 3-socket relay carrier in E-box, plenum
chamber, position 2
Terminal
Harness connector at
ignition coils

Terminal
6 1
- Repair open circuit if necessary.
- Check voltage supply of motronic Engine Control Module (ECM) power
supply relay -J271- Page 28
-18
.
- Check activation of motronic Engine Control Module (ECM) power
supply relay -J271- Page 28
-19
.
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28-55
Evaluation display group 014, display field 3 and display group 015 and 016, display fields 1, 2 and 3. Display field:
3
Possible cause
Corrective action
Larger than 0

spark plug faulty
spark plug connector faulty
Ignition coil or power output stage
faulty - Check spark plugs and ignition wires with connector
- Ignition coils with power output stages. Checking Page
28
-4


Fuel injector faulty- Check fuel injectors Page 24
-38
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pair&id=AUDI.B5.FU06.28.1