Electric Power Steering (EPS) Control Module Removal/Installation: Notes

WARNING:

The temperature of the steering gear (EPS motor) is high just after turning the steering mechanism from lock to lock repeatedly, and it may cause severe burns. Before performing the work, verify that the steering gear has cooled down.

CAUTION:

If the EPS CM is replaced with a new one, perform the configuration after replacing it.
If configuration is not performed, the system does not operate normally.
If the EPS CM is dropped it could result in internal damage, therefore be careful not to drop it. If the EPS CM receives an impact, replace it.

NOTE:

The EPS CM prior to replacement stores the vehicle specification information.
A new EPS CM does not store any vehicle specification information.
When the ignition is switched ON (engine off or on) after the EPS CM is replaced, the EPS CM reads the vehicle specification information sent via CAN communication from the instrument cluster and stores it.

Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
Remove the front under cover. (See FRONT UNDER COVER REMOVAL/INSTALLATION .)
Disconnect the connectors shown in the figure.

Courtesy of MAZDA MOTORS CORP.
Remove the EPS CM. (See EPS CM Installation Note .)

Fig 1: EPS CM, O-Ring And Bolts With Torque Specifications
Courtesy of MAZDA MOTORS CORP.
Install in the reverse order of removal.
If the EPS CM is replaced, perform the following procedure.
1. Perform the EPS CM 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 [EPS].
  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 ] )
    - If a DTC is displayed, clear it. (Refer to [CLEARING DTC ] )
      - 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. Using the M-MDS, verify that DTCs U2300:54/U2300:55/U2300:56 are not displayed.
  - If DTCs U2300:54/U2300:55/U2300:56 are displayed, go to the DTC troubleshooting procedure. (Refer to [DTC INSPECTION ] )