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Home >> Volvo >> 2011 >> S40 T-5 R-Design >> Repair and Diagnosis (Single Page) >> Steering >> Electronic Steering >> Steering Wheel Module (SWM) And Electronic Power Steering (EPS) Diagnostic Trouble Codes (544 Body) >> SWM-Dd02: Communication With Control Modules. Communication Problems (2004-2010) >> Diagnostic Trouble Code (DTC) Information SWM-Dd02
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Diagnostic Trouble Code (DTC) Information SWM-Dd02

Condition 

Fig 1: Identifying Steering Wheel Module (SWM)
GLL139843Courtesy of VOLVO CARS OF NORTH AMERICA.

The control modules communicate with each other in a network via a standardized serial communication interface - LIN (Local Interconnect Network) - to exchange information.

The control modules transmit and receive information. The diagnostic trouble code (DTC) is stored if the steering wheel module (SWM) registers that the communication is disrupted or disabled.

NOTE:

In the event of a system communication fault it is not possible to communicate with the steering wheel module (SWM). Therefore it will only be possible to read off the diagnostic trouble code (DTC) if the fault is intermittent.

The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.

Substitute Value 

Possible Source 

Fault symptom[s]