Checking damper motor control

Fig 1: Engine Start Verification

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Engine running
• Blower fan on.

  Activate the button for floor/ventilation.

  Check that the air flow changes.

Does the air flow change? 

• YES 

  Refer to Checking the wiring 

• NO 

  Refer to Checking the circuit