Checking the power supply and ground for the climate control module (CCM)

Fig 1: Identifying Ignition OFF

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition off

  Check the power supply cable for the climate control module (CCM). Check for an open-circuit. Check for a short-circuit to ground.

  Check the fuse for the power supply relay for the climate control module (CCM). The relay is on the central electronic module (CEM). If the fuse is blown, check the circuit after the fuse for a short-circuit to ground before replacing the fuse. Then replace the fuse.

  Check the function of the power supply relay by replacing it with a new one.

  Check the ground cable between the climate control module (CCM) and the ground terminal. Check for an open-circuit. Also check the ground terminal. Check for contact resistance and oxidation.

  Remedy as necessary.

  Other information: 

  • To access or replace the control module, see Dashboard environment panel (including climate control module (CCM)), replacing
  • To connect the breakout box, see Connecting the breakout box
  • For information about signals and connectors, see Signal description, climate control module (CCM), Connector A
  • For information about checking wiring and terminals see Checking wiring and terminals .
  Fig 2: Breakout Box

  Courtesy of VOLVO CARS OF NORTH AMERICA.
  Fig 3: Identifying Ohm Meter

  Courtesy of VOLVO CARS OF NORTH AMERICA.
  Fig 4: Climate Control Module

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Was a fault detected? 

• YES 

  Refer to Checking the function of the climate control module (CCM) 

• NO 

  Refer to Signal missing