Checking components and wiring

Check the resistance of the air conditioning (A/C) relay. At +20°C the resistance must be approximately 96 Ω between terminals #2 and #4. For the resistance values, see Component specifications .

Check the signal cable between control module terminal #B44 and air conditioning (A/C) relay terminal #4. Check the power supply between system relay terminal #3 and A/C relay terminal #2. Check for an open-circuit. Check for a short-circuit to ground.

Remedy as necessary.

Other information 

• To connect the breakout box / access the control module, see Connecting the breakout box
• For information about signals on 5-cylinder engines, see Signal specification or Signal specification
• See Contents .

Fig 1: Identifying Connector Terminals

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Ohmmeter

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Identifying A/C Relay

Courtesy of VOLVO CARS OF NORTH AMERICA.

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  Refer to Verification