Checking the wires

Check the wire between central electronic module (CEM) 4D and steering wheel module (SWM) 21 (3/130).

Trouble-shoot for an intermittent short circuit to voltage supply as described in Short-circuit to supply voltage, intermittent faults and for an open circuit as described in Open-circuit, intermittent faults .

Do the necessary corrective action.

Additional information 

• To connect the test box, see Connecting the breakout box .
• -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.