Checking components and wiring: Notes

Check the signal cable (+) between heated oxygen sensor (HO2S) terminal #4 and control module terminal #A10 (#A10). Check the signal cable (-) between heated oxygen sensor (HO2S) terminal #3 and control module terminal #A11 (#A11). Check for an open-circuit.

Try a new heated oxygen sensor (HO2S) if the wiring is OK.

Remedy as necessary.

Other information: 

• To connect the breakout box and access the control module, see Connecting the breakout box
• To access or replace the heated oxygen sensor (HO2S), see Heated oxygen sensor (HO2S), replacing
• For information about signals:
  • For 6 cylinder engines -2001, see Signal specification
  • For 6 cylinder engines 2002-, see Signal specification
  • For 6 cylinder engines -2004, see Signal specification
  • For 6 cylinder engines 2005-, see Signal specification .
• See Contents .

Fig 1: Identifying Rear Heated Oxygen Sensor (HO2S) Connector

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Ohmmeter

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Identifying Rear Heated Oxygen Sensor (HO2S)

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Continue 

  Refer to Verification