DSC Control Inspection

WARNING: This page is about a different car, the 2005 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.

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.

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.

Fig 1: Identifying Data Link Connector-2

Courtesy of MAZDA MOTORS CORP.

WHEELS INSPECTION COMMAND

Command name	Inspected wheels
	Understeer control inhibited		Oversteer control inhibited
	LF	RF	LR	RR
LF_TC_VLV	ON	OFF		ON
RF_TC_VLV	OFF	ON		OFF
LF_DSC_V	OFF
RF_DSC_V	OFF
ABS_POWER	ON
LF_INLET	OFF	OFF	OFF	ON
LF_OUTLET		OFF		OFF
LR_INLET		ON
LR_OUTLET		OFF
RF_INLET			ON
RF_OUTLET			OFF
RR_INLET	ON
RR_OUTLET	OFF
PMP_MOTOR	ON

Send the command while rotating the wheel being inspected by hand in a forward direction.
Confirm that the wheel does not rotate easily while a DSC HU/CM operation click sound is heard.
- 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