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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 automatic 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 or removing the DSC HU/CM, make sure to 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.
  • Brake fluid will damage painted surfaces. Be careful not to spill any on painted surfaces. In addition, if there is any brake fluid on the wiring harness, the wire insulation may corrode causing a malfunction such as a short circuit. If brake fluid gets on a painted surface or wiring harness, wash and flush it off completely with water immediately.
NOTE:
  • When the ignition is switched ON or the engine is started after the DSC HU/CM have been replaced, the DSC CM reads data from the instrument cluster via CAN communication to perform automatic configuration.
  • The DSC HU/CM prior to replacement stores the vehicle specification information.
  • A new DSC HU/CM does not store any vehicle specification information.
  • Tighten the brake pipe flare nut using any commercially available flare nut wrench.
  1. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
  2. Remove the washer tank bracket. (See WASHER TANK REMOVAL/INSTALLATION .)
  3. For SKYACTIV-G (VIN Y), perform the following procedure:
    1. Remove the bolts and the nut.

      SKYACTIV-G (VIN Y) 

      Fig 1: DSC HU/CM Bolts And Nuts With Torque Specification (Skyactiv-G [VIN Y])
      G12234481Courtesy of MAZDA MOTORS CORP.
    2. Remove the nut.
      G12234483Courtesy of MAZDA MOTORS CORP.
    3. Disconnect the ground and the clips.
    4. Detach the tabs of the PCM WIRING HARNESS protector and the bracket, and remove the bracket.
      G12188971Courtesy of MAZDA MOTORS CORP.
    5. Set the PCM component and the cooler hose (LO) aside in the directions of the arrows shown in the figure.
      G12188972Courtesy of MAZDA MOTORS CORP.
    6. Remove the bracket.
      Fig 2: PCM Component Bracket Bolts With Torque Specification
      G12234486Courtesy of MAZDA MOTORS CORP.
    7. Set the bracket aside so that it does not interfere with the servicing.
  4. Remove in the order indicated in the table.
  5. Install in the reverse order of removal.
  6. After installation, add brake fluid, bleed the air, and inspect for fluid leakage. (See BRAKE FLUID AIR BLEEDING .)
  7. If the DSC HU/CM is replaced, perform the auto configuration and the initialization of the sensors for DSC-related parts.
    1. Switch the ignition ON (engine off or on) and wait for 10 s or more.
    2. Switch the ignition off and wait for 3 s or more.
    3. Switch the ignition ON (engine off or on) and wait for 3 s or more for the DSC HU/CM auto configuration to complete.
    4. Clear the DTC. (See CLEARING DTC [DYNAMIC STABILITY CONTROL (DSC)] .)
    5. Switch the ignition off and wait for 3 s or more.
    6. Switch the ignition ON (engine off or on) and wait for 10 s or more.
    7. Using the M-MDS, verify that DTCs U2300:52/U2300:54/U2300:55/U2300:56/U2300:64 are not displayed.
    8. Perform the sensor initialization for the DSC-related parts. (See DSC RELATED PARTS SENSOR INITIALIZATION PROCEDURE .)
    9. Clear the DTC. (See CLEARING DTC [DYNAMIC STABILITY CONTROL (DSC)] .)
    10. Switch the ignition off and wait for 3 s or more.
    11. Switch the ignition ON (engine off or on) and wait for 10 s or more.
    12. Using the M-MDS, verify that DTCs C0061:54/C0062:54/C0063:54 are not displayed.
      Fig 3: DSC HU/CM Components With Torque Specification
      G13722768Courtesy of MAZDA MOTORS CORP.
    PARTS DESCRIPTION

    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 Pipe holder
    4 Nut
    (See BOLT AND NUTS INSTALLATION NOTE .)
    5 Bolt
    (See BOLT AND NUTS INSTALLATION NOTE .)
    6 DSC HU/CM component
    7 Bolt
    8 DSC HU/CM
    9 Spacer
    10 Mount rubber
    11 Bracket
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