Checking auxiliary heater

Fig 1: Identifying Ignition ON

Courtesy of VOLVO CARS OF NORTH AMERICA.

Ignition on.
NOTE: It is important that only the ignition is on for the heater to start up.
Activate the heater.
A buzzing sound should be heard from the heater.

Check the function of the heater as described in Engine coolant heater, test running .

Additional information:
- For a description of the parameters, see Description of parameters .
- For a description of activations, see Activating components/functions .
Fig 2: Identifying VCT2000 Diagnostic Tool Symbol In VIDA
Courtesy of VOLVO CARS OF NORTH AMERICA.