S6 V8-4.2L (BBD) (2004)
NOTE: This analysis will help you locate the cause of the line malfunction.
Example 1:
From the DTCs stored in the memories, you have determined that control module 1 is not communicating with control modules 2 and 3.
Control module
DTCs stored in DTC memory
1
- Missing signal from control module 2
- Missing signal from control module 3
2
- Missing signal from control module 1
3
- Missing signal from control module 1
-
Switch ignition off.
-
Disconnect the control modules connected across the bus wires and check the bus wires For an open circuit.
-
Replace control module 1 if no malfunctions can be found in the bus wires.
Example 2:
From the DTCs stored in the memories, you have determined that control module 2 is not communicating with control modules 1 and 3.
Control module
DTCs stored in DTC memory
1
- Missing signal from control module 2
2
- Missing signal from control module 1
- Missing signal from control module 3
3
- Missing signal from control module 2