Checking the DSA switch

Fig 1: Engine Start Verification

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Connecting Control Unit

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Control module connected.
• Start the engine.
• Read off the status of the switch.

  Check the function of the switch: OFF should be displayed when the switch is unaffected. On should be displayed when the switch is activated (pressed in).

  Fig 3: Identifying VCT2000 Diagnostic Tool Symbol In VIDA

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Is the function of the switch OK? 

• YES 

  Refer to Signal too low. Intermittent fault 

• NO 

  Refer to Checking the signal cable