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Mazda 6 Service Manual: Abs (abs/tcs) hu/cm system inspection

Mazda 6 Service Manual / Braking system / Abs/tcs / Abs (abs/tcs) hu/cm system inspection

System Inspection

Preparation

1. Verify that the battery is fully charged. With the ignition switch on, verify that the ABS and BRAKE system warning lights goes out after 2.4 seconds.

2. If the lights stays on after 2.4 seconds,

the ABS (ABS/TCS) HU/CM detects a failure. Follow the troubleshooting procedures.

3. Turn the ignition switch off.

4. On level ground, jack up the vehicle and support it evenly on safety stands. Shift the transaxle to N position.

5. Release the parking brake.

6. Rotate the wheels by hand, and inspect for brake drag.

Operation of ABS inspection

1. Perform the Preparation.

2. Connect the SSTs

(WDS or equivalent) to the data link connector-2 (DLC-2).



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

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

Note

4. Send the command while pressing on the brake pedal and attempting to rotate the wheel being inspected.

5. When pressure is being maintained, and click sound indicating the solenoid is operating comes from the ABS (ABS/TCS) HU/CM, confirm that the wheel does not rotate. When pressure is being reduced, and click sound indicating the solenoid is operating comes from the ABS (ABS/TCS) HU/CM, confirm that the wheel rotates, even though the brake pedal is being depressed.

Note

- The ABS (ABS/TCS) HU/CM brake lines are normal.

- The ABS (ABS/TCS) HU/CM hydraulic system is not significantly abnormal.

- The ABS (ABS/TCS) HU/CM wiring is normal.

- ABS (ABS/TCS) HU/CM input system harness and parts

- Extremely small leaks in the ABS (ABS/TCS) HU/CM internal hydraulic system

- Unusual intermittent occurrences in the above items

Abs/tcs
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Abs (abs/tcs) hu/cm removal/installation
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