Checking The Power Supply And Ground For The Climate Control Module (CCM)

Fig 1: Identifying Ignition OFF

Courtesy of VOLVO CARS CORPORATION

• Ignition off

  Check fuses in the engine compartment fusebox for the power supply to the central electronic module (CEM).

  Check the fuse in the central electronic module (CEM) for the infotainment supply relay. The relay is inside the central electronic module (CEM). If the fuse is blown, check the circuit by the central electronic module (CEM) before replacing the fuse. Check for a short-circuit to ground. Then replace the fuse.

  If necessary, check the cable from the junction between the supply cable for the infotainment control module (ICM) and the supply cable powering the climate control module (CCM). Check for an open-circuit. Check for a short-circuit to ground.

  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 

  • see CONNECTING THE BREAKOUT BOX (2007)
  • see SIGNAL DESCRIPTION CENTRAL ELECTRONIC MODULE (CEM)
  • see CONTROL MODULE RELAY BOX PASSENGER COMPARTMENT
  • see CHECKING WIRING AND TERMINALS
  Fig 2: Identifying Ohms Display

  Courtesy of VOLVO CARS CORPORATION
  Fig 3: Identifying Climate Control Module

  Courtesy of VOLVO CARS CORPORATION

Was a fault detected? 

• YES 

  Refer to VERIFICATION 

• NO 

  Refer to CHECKING THE INFOTAINMENT RELAY STATUS