Break Checking

Fig 1: Identifying Ignition On Position

Courtesy of VOLVO CARS OF NORTH AMERICA.

Ring break diagnosis 

A ring break diagnosis should be performed to determine where the fault has occurred.

Get the MOST system to perform a complete ring break diagnosis, as follows:

1. Turn ignition off and remove key.
2. Remove the fuse for the infotainment relay.
3. Wait at least three minutes.
4. Ignition on
5. Reinstall the fuse(s) within 25 seconds.
6. Wait at least 30 seconds after ignition on before taking a break position reading.

• Continue 

  See: OBTAINING A BREAK POSITION READING