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Home >> Mazda >> 2009 >> CX-9 Touring, 3.7 V, AWD >> Repair and Diagnosis >> Brakes >> Traction Control >> Dynamic Stability Control System/Roll Stability Control System >> DSC/RSC System Inspection >> ABS Control Inspection
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ABS Control Inspection

  1. Perform "Preparation".
  2. Connect the M-MDS to the DLC-2.
  3. Set up an active command mode inspection according to the combination of commands below.
    Fig 1: Identifying DLC2 Connector Terminal
    G04969748Courtesy of MAZDA MOTORS CORP.

    Brake pressure retention 

    BRAKE PRESSURE RETENTION REFERENCE CHART

    Command name Inspected wheels
    LF RF LR RR
    V_TRC_L OFF
    V_TRC_R
    V_STB_L
    V_STB_R
    V_LF_INL ON OFF OFF OFF
    V_LF_OTL OFF
    V_LR_INL ON
    V_LR_OTL OFF
    V_RF_INL ON
    V_RF_OTL OFF
    V_RR_INL ON
    V_RR_OTL OFF
    PMP_MOTOR OFF

    Brake pressure reduction 

    BRAKE PRESSURE RETENTION REFERENCE CHART

    Command name Inspected wheels
    LF RF LR RR
    V_TRC_L OFF
    V_TRC_R
    V_STB_L
    V_STB_R
    V_LF_INL ON OFF OFF OFF
    V_LF_OTL
    V_LR_INL OFF ON
    V_LR_OTL
    V_RF_INL ON OFF
    V_RF_OTL
    V_RR_1NL OFF ON
    V_RR_OTL
    PMP_MOTOR ON
    CAUTION:
    • To protect the DSC/RSC HU/CM, the solenoid valve and the pump motor used during active command mode stay on for only 10 s or less each time they are switched on. 
    NOTE:
    • When working with two people, one should press on the brake pedal, and the other should attempt to rotate the wheel being inspected.
  4. Send the command while depressing on the brake pedal and attempting to rotate the wheel being inspected.
  5. While brake pressure is maintained and a DSC/RSC HU/CM operation click sound is heard, confirm that the wheel does not rotate. While brake pressure is being reduced and an DSC/RSC HU/CM operation click sound is heard, confirm that the wheel rotates.
    • Performing the inspection above determines the following:
      • The DSC/RSC HU/CM brake lines are normal.
      • The DSC/RSC HU/CM hydraulic system is not significantly abnormal (including DSC/RSC HU/CM).
      • The DSC/RSC HU/CM internal electrical parts (solenoid, motor and other parts) are normal.
      • The DSC/RSC unit and DSC/RSC HU/CM output system wiring harnesses (solenoid valve, relay system) are normal.
    • However, the following items cannot be verified.
      • Malfunction with intermittent occurrence of the above items
      • Malfunction of DSC/RSC HU/CM input system wiring harnesses and parts
      • Extremely small leaks in the DSC/RSC HU/CM internal hydraulic system
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