display AUDI A4 1998 B5 / 1.G Brakes Can Bus Workshop Manual

01-34

- If you cannot determine a cause for the DTC
"Hardware malfunction", check whether the DTC
is caused by one of the control modules.

All control modules that use the CAN-bus are
still disconnected. The ignition is switched off.

- Connect one of the control modules.

- Connect the VAG1551 Scant Tool (ST) or the
VAG1552 mobile 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 "Hardware malfunction" is
displayed, replace the control module you just
connected.

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