Checking the power supply

Fig 1: Identifying Ignition OFF

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition off.

  Connect a voltmeter between the canister purge (CP) valve connector terminal #1 (control module side) and ground.

  Fig 2: Identifying Canister Purge (CP) Valve 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 the power cable