DSC/RSC SYSTEM INSPECTION

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Preparation

1. Verify that battery is fully charged.

2. Turn the ignition switch to the ON position, and verify that the ABS warning light goes out after approx. 3 s.

3. Turn the ignition switch to the OFF position.

4. Jack up the vehicle and support it evenly on safety stands.

5. Shift to the N position.

6. Verify that all four wheels rotate.

7. Rotate the inspected wheels by hand, and verify there is no brake drag.

  • If there is any brake drag, perform regular brake inspection.
  • If there is no brake drag, perform DSC/RSC HU/CM operation inspection.

ABS Control Inspection

1. Perform “Preparation”.

2. Connect the M-MDS to the DLC-2.

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3. Set up an active command mode inspection according to the combination of commands below.

Brake pressure retention

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

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_INL | 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

DSC Control Inspection

1. Perform “Preparation”.

2. Connect the M-MDS to the DLC-2.

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3. Set up an active command mode inspection according to the combination of commands below.

  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.

Command name | Inspected wheels
--- | ---
Understeer control inhibited | Oversteer control inhibited
LF | RF | LR | RR
V_TRC_L | On | Off | On
V_TRC_R | Off | On | Off
V_STB_L | Off
V_STB_R
V_LF_INL | Off | Off | Off | On
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 | On

4. Send the command while rotating the wheel being inspected by hand in a forward direction.

5. Confirm that the wheel does not rotate easily while a DSC/RSC HU/CM operation click sound is heard.

  • 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