Checking the wiring

Fig 1: Identifying Ignition ON

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition off
• Disconnect connector B on the climate control module (CCM).
• Ignition on

  Check the matrix wiring. Check for a short-circuit to supply voltage. Check for a short-circuit to ground.

  Take readings between the following terminals on connector B and ground:

  • #B11 (#11)
  • #B12 (#12)
  • #B13 (#13)
  • #B14 (#14).

  Check whether there is an internal short-circuit in the matrix cables. Take pairs of readings between all the terminals #B11-#B14 on connector B.

  Other information: 

  • See Connecting the breakout box
  • See Dashboard environment panel (including climate control module (CCM)), replacing .
  • See Damper motor temperature, replacing .
  • See Signal specification .
  • See Checking wiring and terminals .
  Fig 2: Identifying Ohm Meter

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Was a fault detected? 

• YES 

  Refer to Equipment 

• NO 

  Refer to Checking the component