alternator AUDI A8 2003 D3 / 2.G Technical Features Manual
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4567
G256G257E24E25
N198N251N252N153N154N196N197
G180
N251 Curtain airbag igniter, driver side
N252 Curtain airbag igniter,
front passenger side
Colour code
= Input signal
= Output signal
= Positive supply
= Earth
Additional signals
Battery A (positive)
Positive connection to starter B and
alternator C
Terminal 58s
Drive system CAN (High)
Drive system CAN (Low)
Crash signal
Airbag disabled warning lamp,
front passenger side K145
1
2
3
4
5
6
7
SSP282_069
Page 22 of 96
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Passenger Protection
15 30
+
-
31
J644
J655
43
B
1
2
A
TerminalPinInput/outputDescription
30, battery A Input
(screw connection)U
bat. term. 30/battery
87 B Output
(screw connection)Output
Terminal 15 1 Input
(plug connection)Positive power supply,
interruptible
Vehicle earth 2 Input
(plug connection)Earth from
airbag control unit J234
Crash signal 3 Input
(plug connection)Crash signal from
airbag control unit J234
Diagnosis 4 Input
(plug connection)Diagnostic wire from
airbag control unit J234
Battery cut-off relay J655
The battery cut-off relay is a battery isolating
element designed to disconnect starter and
alternator power from the electrical system in
the event of a crash.
Block diagram
J644 Energy management control unit
J655 Battery cut-off relay
SSP282_076