Remove Connectivity Master Unit (CMU): Notes

NOTE:

The Bluetooth® pairing information stored in the connectivity master unit (CMU) cannot be written to a new connectivity master unit (CMU). Therefore, the Bluetooth® pairing information will be eliminated if the CMU is replaced. When replacing the CMU, explain to the customer that Bluetooth® pairing needs to be reset.
Depending on the condition of the vehicle, it may not be possible to backup/restore the connectivity master unit (CMU) data prior to replacement. If the backup/restore cannot be performed, the data set in the connectivity master unit (CMU) and the data set in other ECUs will not be consistent. Therefore, the vehicle information needs to be initialized. When replacing the connectivity master unit (CMU), explain to the customer that it may be necessary to reset the following information before replacing.
- Navigation points of interest ADAS settings
- Audio station settings
- Driving position information
- ADAS settings
- Driver's face information

Fig 1: Connectivity Master Unit, Connector And Bolts With Torque Specification

Courtesy of MAZDA MOTORS CORP.

TIGHTENING TORQUE SPECIFICATION

Step	Part name	Applicable condition
1	Bolt	-	11 N.m {110 kgf.cm, 95 in.lb}
2	Connectivity master unit (CMU) (See Connectivity master unit (CMU) installation note )	-	-
3	Connector	-	-
4	Connector	Vehicles with rear mount camera	-