Checking the wiring and component

WARNING: This page is about a different car, the 2004 Volvo S40, 2003 Volvo S40, 2002 Volvo S40, 2001 Volvo S40, and 2000 Volvo S40. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Ignition OFF

Courtesy of VOLVO CARS OF NORTH AMERICA.

Ignition off.
Check the cable between control module terminal #63 and rear heated oxygen sensor (HO2S) connector terminal #2. Check for a short-circuit to supply voltage according to Short-circuit to supply voltage. Permanent faults .

Try a new rear heated oxygen sensor (HO2S) if no fault is found during the above fault-tracing

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 rear heated oxygen sensor (HO2S), see Replacing lambda sonde rear
- 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.

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Refer to Verification