check engine light AUDI A8 1998 D2 / 1.G ATQ Engine Electronic Engine Power Control Checking Workshop Manual
Page 6 of 41
24-138
Function test of warning lamp
- Switch ignition on.
Engine Control Module (ECM) switches EPC
lamp on.
- Start engine.
Shortly after engine is started, the EPC
warning lamp will go out if there are not
malfunctions stored in DTC memory that
relate to the E-gas system
A- Fault light for power accelerator activation
-K132- does not light up
- Connect VAG1598/31 test box at wiring harness
to ECM, do not connect ECM Page 24
-17
.
- Bridge sockets 1 and 48 of test box.
- Switch ignition on.
Warning lamp must light up.
If warning lamp does not light up:
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power control
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p://127.0.0.1:8080/audi/servlet/Dis
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Page 9 of 41
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
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.FU05.24.5