Diagnostic Trouble Code (DTC) Information SWM-Dd11

Condition 

Fig 1: Identifying Steering Wheel Switch Right (SWSR)

Courtesy of VOLVO CARS CORPORATION

The signals from the Steering wheel switch right (SWSR) and Steering wheel switch left (SWSL) to the Steering wheel module (SWM) are transferred via LIN communication. The diagnostic trouble code (DTC) is stored if the steering wheel module (SWM) registers that the communication is disrupted or disabled.

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

Substitute Value 

• None.

Possible Source 

• Communication problems. The steering wheel keypad (SWSR) is not responding.

Fault symptom[s] 

• The radio buttons on the steering wheel do not function
• The carphone buttons on the steering wheel do not work
• The RTI buttons on the steering wheel do not function.