Diagnostic trouble code information

SWM-001D 

Condition 

Fig 1: Identifying Audio Control Volume+ & Volume- Buttons

Courtesy of VOLVO CARS OF NORTH AMERICA.

If SWM microprocessor/control unit registers that Volume+ switch is activated for more than 5 minutes, diagnostic trouble code SWM-001D is displayed.

Substitute Value 

Nothing.

Possible Source 

• Volume+ switch is activated for more than 5 minutes.

Fault symptom[s] 

• Volume changes without volume up or volume down buttons being activated manually
• Radio steering wheel buttons do not work
• Telephone steering wheel buttons do not work.