LF Control Unit Removal/Installation

CAUTION:

If the LF control unit is replaced with a new one, perform the configuration after replacing it.
If configuration is not performed, the system does not operate normally.

Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
Remove the scuff plate (RH). (See SCUFF PLATE REMOVAL/INSTALLATION .)
Remove the front side trim (RH). (See FRONT SIDE TRIM REMOVAL/INSTALLATION .)
Disconnect the connector.

Courtesy of MAZDA MOTORS CORP.
While pressing the tabs in the directions of arrows (1) shown in the figure below, pull the LF control unit in the direction of arrow (2) to detach the LF control unit from the LF control unit bracket.

Courtesy of MAZDA MOTORS CORP.
Remove the LF control unit from the LF control unit bracket.

When replacing the LF control unit bracket, perform the following procedure.

Remove the bolt.

Fig 1: LF Control Unit Bracket And Bolt With Torque Specifications
Courtesy of MAZDA MOTORS CORP.

While pressing the tabs in the directions of arrows (1) shown in the figure below, pull the LF control unit bracket in the direction of arrow (2) to detach the LF control unit bracket tabs from the body.

Courtesy of MAZDA MOTORS CORP.

Remove the LF control unit bracket from the body.

Install in the reverse order of removal.
If the LF control unit is replaced, perform the following procedure.
1. Perform the LF control unit configuration using the M-MDS.
  1. Connect the M-MDS to the DLC-2.
  2. Switch the ignition ON (engine off or on).
  3. Perform the following procedure using the M-MDS.
    CAUTION:
    If the configuration fails, perform the configuration again.
    1. Press [Start] for the vehicle identification.
    2. Press the [Toolbox] tab.
    3. Press the [Work Support] icon.
    4. Press [Configuration].
    5. Press [Run] for [Configuration].
    6. Press [LFU].
  4. Perform the servicing following the instructions on the screen.
    CAUTION:
    When performing the configuration, CAN communication is cut temporarily and communication error DTCs may be detected. After performing the configuration, perform the DTC inspection and clear DTCs if any are displayed.
  5. Perform the DTC inspection. (Refer to [DTC INSPECTION ] in the troubleshooting information)
    - If a DTC is displayed, clear it. (Refer to [CLEARING DTC ] in the troubleshooting information)
      - If the DTC is displayed again, repair or replace the malfunctioning location according to the applicable DTC troubleshooting.
  6. If the configuration fails, perform the configuration procedure again.
2. Perform the immobilizer system-related part programming using the M-MDS. (Refer to IMMOBILIZER SYSTEM-RELATED PARTS PROGRAMMING [SECURITY AND LOCKS] in the troubleshooting information)
3. Clear the DTC. (Refer to [CLEARING DTC ] in the troubleshooting information)