ABS Control Inspection
- Perform "Preparation".
- Connect the WDS or equivalent to the DLC-2.
- Set up an active command mode inspection according to the combination of commands below.
Courtesy of MAZDA MOTORS CORP. BRAKE PRESSURE RETENTION
| Command name |
Inspected wheels |
| LF |
RF |
LR |
RR |
| V_TRC_L |
OFF |
| V_TRC_R |
| V_STB_L |
| V_STB_R |
| LF_INLET |
ON |
OFF |
OFF |
OFF |
| LF_OUTLET |
OFF |
| LR_INLET |
ON |
| LR_OUTLET |
OFF |
| RF_INLET |
ON |
| RF_OUTLET |
OFF |
| RR_INLET |
ON |
| RR_OUTLET |
OFF |
| PMP_MOTOR |
BRAKE PRESSURE REDUCTION
| Command name |
Inspected wheels |
| LF |
RF |
LR |
RR |
| V_TRC_L |
OFF |
| V_TRC_R |
| V_STB_L |
| V_STB_R |
| LF_INLET |
ON |
OFF |
OFF |
OFF |
| LF_OUTLET |
| LR_INLET |
OFF |
ON |
| LR_OUTLET |
| RF_INLET |
ON |
OFF |
| RF_OUTLET |
| RR_INLET |
OFF |
ON |
| RR_OUTLET |
| PMP_MOTOR |
ON |
CAUTION:
- To protect the DSC 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.
- Send the command while depressing on the brake pedal and attempting to rotate the wheel being inspected.
- While brake pressure is maintained and a DSC HU/CM operation click sound is heard, confirm that the wheel does not rotate. While brake pressure is being reduced and an DSC HU/CM operation click sound is heard, confirm that the wheel rotates.
- Performing the inspection above determines the following:
- The DSC HU/CM brake lines are normal.
- The DSC HU/CM hydraulic system is not significantly abnormal (including DSC HU/CM).
- The DSC HU/CM internal electrical parts (solenoid, motor and other parts) are normal.
- The DSC unit and DSC 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 HU/CM input system wiring harnesses and parts
- Extremely small leaks in the DSC HU/CM internal hydraulic system