Checking Power Supply

Fig 1: Identifying Ignition Switch ON Position

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition on.

  Check the supply voltage between antenna unit terminal #1 and ground.

  Fig 2: Identifying Voltmeter

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Is the voltage OK? 

• YES 

  Refer to Checking the signal cable 

• NO 

  Refer to Checking cable for an open-circuit