instrument cluster AUDI A8 1998 D2 / 1.G ATQ Engine Electronic Engine Power Control Checking Workshop Manual

24-136

Electronic Power Control (EPC) warning
lamp -K132- in instrument cluster,
significance

"EPC" is an abbreviation and stands for
Electronic Power Control (E-gas).

Installation location of EPC warning lamp
Engine Control Module (ECM) checks all components that are important
for function of the E-Gas system after ignition is switched on.
The Engine Control Module (ECM) switches on the EPC warning lamp
after ignition is switched on. Shortly after engine is started, the EPC
warning lamp will go out. This requires, first of all, that the Engine Control
Module (ECM) does not detect a malfunction in the E-gas system and,
secondly, that activation of the lamp by the Engine Control Module (ECM)
is OK.
If malfunctions are recognized in the E-Gas system during operation of
the engine, the ECM switches on the EPC warning lamp in instrument
cluster. (These malfunctions are listed in the DTC table). An entry is made
in DTC memory at the same time.
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- Switch ignition off.

- Remove instrument cluster:

Repair Manual, Electrical Equipment, Repair
Group 90, Instrument cluster, removing and installing

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24-139

- Check the following wire connection for open
circuit and short circuit to B+:

Test box
VAG1598/31
Socket
Instrument cluster

Terminal
48 Electrical Wiring Diagrams,
Troubleshooting & Component
Locations binder

- Repair open circuit or short circuit if
necessary.
If wire connection is OK:

- Replace Engine Control Module (ECM) Page
24
-21
.
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24-140

B- Fault light for power accelerator activation
-K132- lights up constantly

- Check DTC memory of Engine Control Module
(ECM).
If no DTCs are stored:

- Connect VAG1598/31 test box at wiring harness
to ECM, do not connect ECM Page 24
-17
.

- Remove instrument cluster:

Repair Manual, Electrical Equipment, Repair
Group 90, Instrument cluster, removing and installing


- Check the following wire connection for short
circuit to Ground (GND):

Test box
VAG1598/31
Socket
Instrument cluster

Terminal
48 Electrical Wiring Diagrams,
Troubleshooting & Component
Pa
ge 9 of 41 Electronic en
gine
power control
(E-Gas
), checkin
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11/23/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU05.24.5