Checking damper motor control

Fig 1: Engine Start Verification

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Engine running
• Blower fan on.

  Change the temperature on the left temperature control between max and min.

  Check that the temperature changes on the left-hand side of the passenger compartment.

Does the temperature change? 

• YES 

  Refer to Checking the wiring 

• NO 

  Refer to Checking the circuit