Intermittent fault

Check the signal wires between: 

• central electronic module (CEM) 6A and stepper motor 2
• central electronic module (CEM) 7A and stepper motor 3
• central electronic module (CEM) 11A and stepper motor 4
• central electronic module (CEM) 12A and stepper motor 5.

for a short circuit to ground as described in Short-circuit to ground, intermittent faults , an open circuit as described in Open-circuit, intermittent faults  and contact resistance and oxidation as described in Contact resistance and oxidation .

Do the necessary corrective action.

Additional information: 

• To access/replace the central electronic module (CEM), see Central electronic module (CEM), replacing
• To access/replace stepper motor, see Stepper motor, steering gear, replacing 
• To connect a test box, see Connecting the breakout box
• For information on signals and additional values, see Signal specification .

Fig 2: Breakout Box

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Identifying Ohm Meter

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 4: Identifying Connector Terminals

Courtesy of VOLVO CARS OF NORTH AMERICA.

Refer to Information