ignition AUDI A8 1998 D2 / 1.G ATQ Engine Additional Signals Testing User Guide

24-199

If you cannot determine a cause for the DTC
"Powertrain databus malfunction, check
whether the DTC is caused by one of the
control modules.
All control modules that use the CAN-bus are still
disconnected. Ignition is switched off.

- Connect one of the control modules.

- Connect VAG 1551 scan tool. Switch ignition on,
and erase the DTC memory of the control
module you just connected. End scan tool output
using the "End Output" function 06.

- Switch ignition off and then on.

- Leave ignition on for 10 seconds. Then, read the
DTC memory of the control module you just
connected.

- If the DTC "Powertrain databus malfunction" is
displayed, replace the control module you just
connected.

- If the DTC "Powertrain databus malfunction" is
not displayed, connect the next control module
and repeat the procedure.
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