DSC HU/Cm Removal/Installation: Notes

WARNING:

If the DSC HU/CM configuration is not completed, it could result in an unexpected accident due to the DSC being inoperative. If the DSC HU/CM is replaced, always use the configuration function so that the DSC operation conditions are correct.
If the DSC related parts sensor initialization procedure is not completed, the DSC will not operate properly and it might cause an unexpected accident. Therefore, after replacing the DSC HU/CM, always perform the DSC related parts sensor initialization procedure to insure proper DSC operation.

CAUTION:

The internal parts of the DSC HU/CM could be damaged if dropped. Be careful not to drop the DSC HU/CM. Replace the DSC HU/CM if it is subjected to an impact.

NOTE:

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

Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
Remove in the order indicated in the table.
Install in the reverse order of removal.
After installation, add brake fluid, bleed the air, and inspect for fluid leakage. (See BRAKE FLUID AIR BLEEDING .)
If the DSC HU/CM is replaced, perform the following procedure.

Perform the DSC HU/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 [Other].
4. Perform the servicing following the instructions on the screen.
  NOTE:
  - 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.
Using the M-MDS, verify that DTCs U2300:54/U2300:55/U2300:56/U2300:64 are not displayed.
- If DTCs U2300:54/U2300:55/U2300:56/U2300:64 are displayed, go to the DTC troubleshooting procedure. (Refer to [DTC INSPECTION ] )
Perform the sensor initialization for the DSC-related parts. (See DSC RELATED PARTS SENSOR INITIALIZATION PROCEDURE .)
Clear the DTC. (Refer to [CLEARING DTC ] )
Switch the ignition off and wait for 3 s or more.
Switch the ignition ON (engine off or on) and wait for 10 s or more.
Using the M-MDS, verify that DTCs C0044:54/C0061:54/C0062:54/C0063:54 are not displayed.
- If DTCs C0044:54/C0061:54/C0062:54/C0063:54 are displayed, go to the DTC troubleshooting procedure. (Refer to [DTC INSPECTION ] )

Fig 1: DSC HU/CM Components Location With Torque Specifications

Courtesy of MAZDA MOTORS CORP.

COMPONENT OPERATIONS

Component no.	Refer to
1	DSC HU/CM Connector (See DSC HU/CM Connector Removal Note .) (See DSC HU/CM Connector Installation Note .)
2	Brake pipe (See BRAKE PIPE REMOVAL NOTE .) (See BRAKE PIPE INSTALLATION NOTE .)
3	Bolt (See BOLT INSTALLATION NOTE .)
4	Clip, Brake pipe (See CLIP, BRAKE PIPE INSTALLATION NOTE .)
5	Nut
6	Mount rubber
7	Bracket
8	DSC HU/CM