A6 Quattro Sedan V8-4.2L (ART) (2000)
/Page-3710004.png)
-
Disconnect control modules which are linked by bus wires and check for a short circuit between the bus wires.
-
Check bus wires for short to B+ and short to Ground (GND).
If the cause of the malfunction "Data Bus Power train Malfunction" cannot be found in the data bus wires, check whether one of the control
modules is the cause.
At this stage all the control modules which communicate via the CAN data bus are disconnected. The ignition is switched off.
-
Connect one of the control modules.
-
Connect VAG 1551 Scan Tool. Switch ignition on and erase DTC memory of control module which has just been connected. End output from
scan tool with function 06 "End Output".
-
Switch ignition off and then on again.
-
Leave ignition switched on for 10 seconds. Then check DTC memory of control module that has just been connected, using scan tool.
-
If malfunction "Data Bus Power train Malfunction" is now indicated, replace control module which has just been connected.
-
If malfunction "Data Bus Power train Malfunction" is not indicated, connect next control module, and repeat above procedure.
