Operation of ABS inspection

WARNING: This page is about a different car, the 2005 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

Perform the "Preparation."
Connect WDS or equivalent to the DLC-2.

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

Fig 1: Locating DLC-2 Connector

Courtesy of MAZDA MOTORS CORP.

COMMANDS CHART

OPERATION	COMMAND NAME				COMMAND TYPE
OPERATION	PMP_MOTOR	RF_OUTLET	RF_INLET	ABS_POWER	COMMAND TYPE
Pressure retention	Off	Off	On	On	Manual
Pressure reduction	On	On	On	On	Manual

The chart above shows an example of a right wheel inspection.

NOTE:

When working with two people, one should press on the brake pedal, the other should attempt to rotate the wheel being inspected.

Send the command while pressing on the brake pedal and attempting to rotate the wheel being inspected.
When pressure is being maintained, and a click sound indicating the solenoid is operating comes from the ABS/TCS HU/CM, confirm that the wheel does not rotate. When pressure is being reduced, and a click sound indicating the solenoid is operating comes from the ABS/TCS HU/CM, confirm that the wheel rotates, even though the brake pedal is being depressed.

NOTE:

To protect the ABS/TCS HU/CM, the solenoid valve used for simulations and the ABS motor stay on for 10 seconds each time they are switched on.
Performing the inspections above determines the following.
- The ABS/TCS HU/CM brake lines are normal.
- The ABS/TCS HU/CM hydraulic system is not significantly abnormal.
- The ABS/TCS HU/CM wiring is normal.
However, the following items cannot be checked.
- ABS/TCS HU/CM input system harness and parts.
- Extremely small leaks in the ABS/TCS HU/CM internal hydraulic system
- Unusual intermittent occurrences in the above items.