Checking the wiring and component

Check the cable between control module terminal #B44 (#B54) and air conditioning (A/C) relay terminal #4. Check for a short-circuit to ground. See Short-circuit to ground, permanent faults . Check for an open-circuit. See Open-circuit, permanent faults .

Check the cable between air conditioning (A/C) relay terminal #2 and fuse 5 (in the engine compartment integrated relay / fusebox). Check for an open-circuit. See Open-circuit, permanent faults .

Remedy as necessary.

Other information: 

• To connect the breakout box, see Connecting the breakout box
• To access and replace the air conditioning (A/C) relay, see Replacing relays in the main fuse box and other relays in the engine compartment
• For information about signals, see Signal specification .

Fig 1: Identifying Connector Terminals

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Ohmmeter

Courtesy of VOLVO CARS OF NORTH AMERICA.

Was a fault found in the wiring? 

• YES 

  Refer to Verification 

• NO 

  Refer to Replacing the air conditioning (A/C) relay