Checking wiring and connectors

Check the cable between control module terminal #63 and heated oxygen sensor (HO2S) connector terminal #2. Check for an intermittent open-circuit according to Open-circuit, intermittent faults .

Check the cable between fuse 18 in the integrated relay / fusebox in the engine compartment and heated oxygen sensor (HO2S) terminal #1. Check for an intermittent open-circuit according to Open-circuit, intermittent faults .

Remedy as necessary.

Other information 

• To connect the breakout box and access the control module, see Connecting the breakout box. EMS 2000
• To access or replace the front heated oxygen sensor (HO2S), see Replace the front heated oxygen sensor (HO2S)
• For information about signals see Signal specification .

Fig 2: Identifying Heated Oxygen Sensor (HO2S) Connector Terminals

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Identifying Ohmmeter

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 4: Identifying EMS2000

Courtesy of VOLVO CARS OF NORTH AMERICA.

Refer to Information