Checking Components And Wiring

Check the resistance of the heated oxygen sensor (HO2S) between terminals #3 and #4.

Check the signal cable between heated oxygen sensor (HO2S) terminal #4 and control module terminal #A70 (#B10). Check for a short-circuit to ground.

Remedy as necessary.

Other information

For 6 cylinder engines -2004, see SIGNAL SPECIFICATION
For 6 cylinder engines 2005-, see SIGNAL SPECIFICATION .
To connect the breakout box / 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 resistance values, see COMPONENT SPECIFICATIONS
see CHECKING WIRING AND TERMINALS .

Fig 1: Identifying Front Heated Oxygen Sensor Connector Terminals

Courtesy of VOLVO CARS CORPORATION

Fig 2: Identifying Ohm Meter

Courtesy of VOLVO CARS CORPORATION

Fig 3: Front Heated Oxygen Sensor

Courtesy of VOLVO CARS CORPORATION