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Connectivity Master Unit (CMU) Removal/Installation

WARNING: This page is about a different car, the 2017 Mazda CX-5. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
  • The connectivity master unit (CMU) has stored vehicle specification information.
  • A new connectivity master unit (CMU) does not have any stored vehicle specification information.
  • When the ignition is switched ON (engine off or on) after replacing the connectivity master unit (CMU), the unit reads and stores the vehicle specification information sent via CAN communication from the instrument cluster.
  • 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 connectivity master unit (CMU) is replaced. Before replacing the connectivity master unit (CMU), explain to the customer that the Bluetooth®pairing resetting is required.
  1. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
  2. Remove the following parts:
    1. Lower decoration panel (See DECORATION PANEL REMOVAL/INSTALLATION .)
    2. Upper decoration panel (See DECORATION PANEL REMOVAL/INSTALLATION .)
    3. Upper column cover (See COLUMN COVER REMOVAL/INSTALLATION .)
    4. Meter hood No. 1 (See METER HOOD REMOVAL/INSTALLATION .)
    5. Center display component (See CENTER DISPLAY REMOVAL/INSTALLATION .)
  3. Remove the screws.
    Fig 1: Removing Connectivity Master Unit Screw
    G11426072Courtesy of MAZDA MOTORS CORP.
  4. Remove the connectivity master unit (CMU) from the center display.
  5. Install in the reverse order of removal.
  6. When the connectivity master unit (CMU) is replaced, perform the automatic configuration using the following procedure.
    1. Switch the ignition ON (engine off or on).
    2. Select [Settings] on the center display.
    3. Select [System] on the center display.
    4. Select [Factory Reset] on the center display.
    5. Select [YES] on the center display and implement the connectivity master unit (CMU) initialization.
    6. Verify that the connectivity master unit (CMU) restarts and the menu screen is displayed.
    7. Switch the ignition OFF.
    8. Remove all of the remote transmitters from the vehicle, lock all doors, keep the remote transmitters 2 m {79 in} or more from the vehicle, and wait for 5 min or more.
    9. The connectivity master unit (CMU) automatic configuration is completed.
    10. Using the M-MDS, verify that DTC U2300:54 or U2300:55 is not displayed.
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