Checking the communication cable

Fig 1: Identifying Ignition On Position

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Connecting Control Unit

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition off.
• Connect control module.
• Ignition on.

  Connect a voltmeter between data link connector (DLC) terminal 7 and ground.

  Fig 3: Identifying Connector Terminals

  Courtesy of VOLVO CARS OF NORTH AMERICA.
  Fig 4: Identifying Voltmeter

  Courtesy of VOLVO CARS OF NORTH AMERICA.

The voltmeter should read approximately 9-11 V. 

• OK 

  Refer to Checking communication with the ABS system 

• LOW 

  Refer to Checking for a short-circuit 

• HIGH 

  Refer to Checking for a short-circuit