A4 Quattro Sedan L4-1.8L Turbo (AWM) (2001)
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Control module
DTCs stored in DTC memories:
1
- e.g. powertrain data-BUS faulty
2
- e.g. powertrain data-BUS faulty
3
- e.g. powertrain data-BUS faulty
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Switch ignition off.
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Disconnect the control modules connected across the bus wires and check for short circuits between the bus wires.
-
Check the bus wires for short circuit to B+ or Ground (GND).
If you cannot determine a cause for the malfunction, e.g. "powertrain data-BUS faulty", check whether one of the control modules may be
responsible for the DTC.
All control modules that use the CAN-bus are still disconnected. Ignition is switched off.
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Connect one of the control modules.
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Connect VAG1551 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.
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Switch ignition off and then on.
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Leave ignition on for 10 seconds. Then, read the DTC memory of the control module you just connected.
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If the DTC "powertrain data-BUS faulty" is displayed, replace the control module you just connected.
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If the DTC "powertrain data-BUS faulty" is not displayed, connect the next control module and repeat the procedure.
