Short-circuit between the signal cables

Fig 1: Identifying Ignition ON

Courtesy of VOLVO CARS OF NORTH AMERICA.

Ignition off
Check the connectors for the control module for the steering wheel angle sensor and the steering wheel module (SWM). Check for Contact resistance and oxidation
Ignition on
Read off the status of steering wheel angle signals R1/R2/R3/R4
Carefully turn the steering wheel to the limit positions in both directions and check that the value changes between ON and OFF.
If the value changes between OFF and ON, the cause of the fault was contact resistance or oxidation in the control module or in the steering wheel angle sensor connector.

Other information:
- To disconnect the control module for the steering wheel angle sensor, see Connecting the breakout box to the steering angle sensor
- To disconnect the steering wheel module (SWM), see Steering wheel module (SWM), replacing
- For information about signals for the control module for the steering wheel angle sensor, see Signal description, Control unit for the steering wheel angle sensor (SAS)
- For information about signals to the steering wheel module (SWM), see Signal specification .
Fig 2: Identifying VCT2000 Diagnostic Tool Symbol In VIDA
Courtesy of VOLVO CARS OF NORTH AMERICA.

Do the signals change between OFF and ON?