Checking the wires

Check the wire between central electronic module (CEM) connector 20A and ignition lock connector 50 for an intermittent open circuit as described in Open-circuit, intermittent faults , and for a short circuit to ground as described in Short-circuit to supply voltage, intermittent faults .

Additional information 

• The voltage should be 0V with the key in position 0, I, and II.
• To access/replace the CEM connector, see Central electronic module (CEM), replacing
• To connect a test box, see Connecting the breakout box
• For further information about signals and other values:
  • -2004: Signal specification
  • 2005-: Signal specification

Fig 1: Breakout Box

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Ohm Meter

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Identifying Connector Terminals

Courtesy of VOLVO CARS OF NORTH AMERICA.