Checking the wiring and connections

Check the wires between steering wheel angle sensor (SAS) control unit #5 (#A29) and steering wheel control unit (SWM) #4 (#A4) for a short circuit to voltage supply, as described in Short-circuit to supply voltage, intermittent faults .

Additional information: 

• To connect the test box to the steering wheel angle sensor control unit, see Connecting the breakout box to the steering angle sensor .
• To connect the test box to the steering wheel control unit, see Connecting the breakout box .
• For information on signals, see Signal description, Control unit for the steering wheel angle sensor (SAS) and Signal specification .

Fig 1: Breakout Box

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Voltage Display

Courtesy of VOLVO CARS OF NORTH AMERICA.

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