Checking the terminal

Fig 1: Identifying Ignition OFF

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Connector

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition off
• Front heated oxygen sensor (HO2S) connector disconnected.

  Check the heated oxygen sensor (HO2S) connector for contact resistance and oxidation according to Contact resistance and oxidation .

  Remedy as necessary.

  Fig 3: Identifying Ohmmeter

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Were any faults found? 

• YES 

  Refer to Verification 

• NO 

  Refer to Checking the signal cable