Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
10
Diagnosis
K-wire switch VAS 6017 B
Like in the Audi A4 ´01, K-wire switch is also required in the Audi A4 ´05 for communication between the
individual vehicle systems and the VAS testers.
Since the new control units are diagnosable via CAN only, the new K-wire switch VAS 6017 B must be used.
K-wire switch VAS 6017 B replaces switch VAS 6017 A.
Communication
If communication is to be established between a
control unit and a VAS tester, the tester sends the
appropriate address word via the diagnosis CAN
data bus.
The K-wire switch VAS 6017 B does not evaluate
signals on the diagnosis CAN data bus, rather it
relays them directly to the vehicle.
If the tester receives no response from the control
unit on the diagnosis CAN data bus, its resends the
appropriate address word, this time via the K-wire.
The K-wire switch receives this information and
relays it to the vehicle both on the K-wire and on the
L-wire.
If the control unit sends its response on the L-wire,
the K-wire switch detects this and establishes a
direct connection between the L-wire of the vehicle
and the K-wire of the tester.
As long as the tester is connected to a control unit
via the L-wire, the contact to the K-wire of the
vehicle is broken by the K-wire switch.
343_018
PIN
Designation
1
Terminal 15
2
Unassigned or assigned on US spec vehicles
3
Unassigned
4
Terminal 31
5
Terminal 31
6
Data bus, diagnosis CAN bus, CAN High
7
K-wire
8
Unassigned
9
Unassigned
10
Unassigned or assigned on US spec vehicles
11
Unassigned
12
Unassigned
13
Unassigned
14
Data bus, diagnosis CAN bus, CAN High
15
L lead
16
Terminal 30
343_003
