Diagnostic Trouble Code (DTC) Information SWM-0A12

Condition

Fig 1: Identifying Steering Wheel Module (SWM)

Courtesy of VOLVO CARS OF NORTH AMERICA.

The control modules communicate with each other in a network via a standardized serial communication interface - control area network (CAN) - 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.

NOTE:

In the event of a communication fault with the steering wheel module (SWM) system, 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

Active yaw control is blocked.

Possible Source

Communication fault between the steering wheel module (SWM) and other units.

Fault symptom[s]

Traction control warning lamp lit
The stability control system does not function.