S4 Quattro Sedan V6-2.7L Turbo (APB) (2000)
1
- No message from control module 2
- No message from control module 3
2
- No message from control module 1
3
- No message from control module 1
-
Switch ignition off.
-
Disconnect control modules that are linked by bus wires and check whether there is an open circuit in one of the bus wires
Locations
-
If no malfunction can be identified in the bus wires replace control module 1.
Example 2
From the malfunctions present in the DTC memories, you can see that control module 2 has no connection to control modules 1 or 3.
Control module
Stored malfunctions in DTC memory:
1
- No message from control module 2
2
- No message from control module 1
- No message from control module 3
3
- No message from control module 2
-
Switch ignition off.
-
Disconnect control modules that are linked by bus wires and check whether there is an open circuit in one of the bus wires
-
If no malfunction can be identified in the bus wires replace control module 2.
Example 3
From the malfunctions present in the DTC memories, you can see that none of the control modules are able to transmit or receive signals.
Control module
Stored malfunctions in DTC memory
1
- Data Bus Powertrain Malfunction
2
- Data Bus Powertrain Malfunction
3
- Data Bus Powertrain Malfunction
-
Switch ignition off.