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Electrical Supply Unit (ESU) Removal/Installation: Hatchback-5HB

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  1. To replace the electrical supply unit (ESU), perform the following procedure.
    1. Leave the front doors on both side and the liftgate open until the electrical supply unit (ESU) configuration is completed.
    2. Connect the M-MDS to the DLC-2.
    3. Switch the ignition ON (engine off).
    4. Activate the M-MDS and perform the following procedure.
      1. Press [Start] to start the vehicle identification.
      2. Press the [Toolbox] tab.
      3. Press the [Work Support] icon.
      4. Press [Configuration].
      5. Press [Run] to perform the configuration.
      6. Press [ESU].
      7. When [Install the new ECU] is displayed, move to the electrical supply unit (ESU) replacement procedure.
  2. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .)
  3. Remove the following parts:
    1. Rear package tray (See REAR PACKAGE TRAY REMOVAL/INSTALLATION .)
    2. Trunk covering (See TRUNK COVERING REMOVAL/INSTALLATION .)
    3. Trunk board (See TRUNK BOARD REMOVAL/INSTALLATION (US) .)
    4. Trunk end trim (See TRUNK END TRIM REMOVAL/INSTALLATION .)
    5. Trunk side upper trim (LH) (See TRUNK SIDE UPPER TRIM REMOVAL/INSTALLATION .)
  4. Partially peel the trunk side trim (LH). (See TRUNK SIDE TRIM REMOVAL/INSTALLATION (US) .)
  5. Disconnect the connectors.
    G13180012Courtesy of MAZDA MOTORS CORP.
  6. While pressing the electrical supply unit (ESU) tab in the direction of arrow (1) shown in the figure, pull the electrical supply unit (ESU) in the direction of arrow (2) and detach the electrical supply unit (ESU) tab from the electrical supply unit (ESU) bracket.
    G13180013Courtesy of MAZDA MOTORS CORP.
  7. Pull the electrical supply unit (ESU) in the direction of the arrow shown in the figure and detach the hook from the electrical supply unit (ESU) bracket.
    G13180014Courtesy of MAZDA MOTORS CORP.
  8. Remove the electrical supply unit (ESU).
  9. Install in the reverse order of removal.
  10. If the electrical supply unit (ESU) is replaced, perform the following procedure.
    1. Return to the M-MDS operation and press [Continue].
    2. When the M-MDS processing is completed, press [Next].
    3. When the M-MDS processing is completed, press [Next].
    4. Verify that the following conditions/operations are met/completed, mark the check boxes, and then press [Next].
      • Switch the ignition ON (engine off).
      • Install battery charger to vehicle
      • Battery voltage:11.6 V or more
      • Connect power cable to M-MDS
      • Front doors on both sides and liftgate are open
    5. Press [Finish].
    6. Switch the ignition OFF.
    7. Switch the ignition ON (engine off or on) and wait for 1 s or more to complete the global central configuration (GCC) for the electrical supply unit (ESU) and synchronization between the electrical supply unit (ESU) and the following parts.
      • Body control module (BCM)
      • Door-electrical supply unit (driver's side)
    8. Clear the DTC. (See CLEARING DTC .)
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