1997 AUDI A4 ATW Engine Electronic Power Control Checking Workshop Manual

- Check voltage supply
Pa
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(EPC
) (E-Gas
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24-153

Checking voltage supply

If LED does not light up:
Electrical Wiring Diagrams, Troubleshooting & Component Locations
If LED lights up: - Connect VAG1527B voltage tester as follows:Harness connector
Terminal
Measure to
1 Chassis Ground (GND)
- Switch ignition on.

LED must light up.
- Check wire connection from terminal 1 of connector to fuse for open
circuit:
- Repair open circuit if necessary.
- Checking activation.
Pa
ge 50 of 51 Electronic En
gine Power Control
(EPC
) (E-Gas
), checkin
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11/21/2002 htt
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play?action=Goto&t
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pair&id=AUDI.B5.FU06.24.4

24-154

Checking activation

- Connect VAG1598/31 test box at wiring harness
to Engine Control Module (ECM), do not connect
ECM Page 24
-19
.

- Check following wire connection for open circuit and short circuit to
Ground (GND) and B+: Harness connector
Terminal
VAG1598/31 test box
Socket
2 39
- Repair open circuit or short circuit if necessary.
Pa
ge 51 of 51 Electronic En
gine Power Control
(EPC
) (E-Gas
), checkin
g
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU06.24.4