2007 Mazda 6 MazdaspeedFACTORY OEM SERVICE PROCEDURE

DSC Control Inspection

  1. Perform the "Preparation."
  2. Connect M-MDS to the DLC-2.
  3. Set up an active command modes inspection according to the combination of commands below.
    Fig 1: Locating DLC-2 Connector
    G04325977Courtesy of MAZDA MOTORS CORP.

    Pressure retention 

    PRESSURE RETENTION REFERENCE

    Command name Wheels
    Inhibition of understeer tendency control Inhibition of oversteer tendency control
    LF RF LR RR
    LF_TC_VLV ON OFF ON
    RF_TC_VLV OFF ON OFF
    LF_DSC_V OFF
    RF_DSC_V
    ABS_POWER ON
    LF_INLET OFF OFF OFF ON
    LF_OUTLET OFF
    LR_INLET ON
    LR_OUTLET OFF
    RF_INLET ON
    RF_OUTLET OFF
    RR_INLET ON
    RR_OUTLET ON
    PMP_MOTOR ON
    NOTE:
    • To protect the DSC HU/CM, the solenoid valve used for simulations and the ABS motor stay on for 10 s each time they are switched on.
  4. Send the command while attempting to rotate the wheel being inspected.
  5. When pressure is being maintained, and a click sound indicating the solenoid is operating comes from the DSC HU/CM, confirm that the wheel does not rotate.
    • Performing the inspections above determines the following.
      • The DSC HU/CM brake lines are normal
      • The DSC HU/CM hydraulic system is not significantly abnormal
      • The DSC HU/CM wiring is normal
      • Output system harness in DSC HU/CM (solenoid, relay) are normal
    • However, the following items cannot be checked.
      • The DSC HU/CM input system harness and parts
      • Extremely small leaks in the DSC HU/CM internal hydraulic system
      • Unusual intermittent occurrences in the above items
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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