Checking the power cable

Fig 1: Identifying Ignition ON

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition off
• Mass air flow (MAF) sensor connector disconnected
• Ignition on.

  Connect a voltmeter between mass air flow (MAF) sensor connector terminal #3 (control module side) and ground.

  Fig 2: Identifying Mass Air Flow (MAF) Sensor Connector Terminals

  Courtesy of VOLVO CARS OF NORTH AMERICA.
  Fig 3: Identifying Voltage Display

  Courtesy of VOLVO CARS OF NORTH AMERICA.

The voltmeter must display battery voltage for 2 seconds immediately after the ignition is switched on. 

• OK 

  Refer to Checking the signal cable 

• NOT OK 

  Refer to Checking wiring and terminals