Mazda 2: DSC

DSC LOCATION INDEX

Mazda 2. DSC LOCATION INDEX

  1. DSC HU/CM
    • (See DSC SYSTEM WIRING DIAGRAM.)
    • (See DSC SYSTEM INSPECTION.)
    • (See DSC HU/CM REMOVAL/INSTALLATION.)
    • (See DSC HU/CM INSPECTION.)
  2. Brake fluid pressure sensor (Built into DSC HU/CM)
    • (See BRAKE FLUID PRESSURE SENSOR INSPECTION.)
    • (See DSC SENSOR INITIALIZATION PROCEDURE.)
  3. DSC OFF switch
    • (See DSC OFF SWITCH REMOVAL/INSTALLATION.)
    • (See DSC OFF SWITCH INSPECTION.)
  4. Rear ABS wheel-speed sensor
    • (See REAR ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION.)
    • (See REAR ABS WHEEL-SPEED SENSOR INSPECTION.)
  5. Front ABS wheel-speed sensor
    • (See FRONT ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION.)
    • (See FRONT ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION.)

DSC SYSTEM WIRING DIAGRAM

Mazda 2. DSC SYSTEM WIRING DIAGRAM

DSC SYSTEM INSPECTION

Preparation

1. Verify that the battery is fully charged.

2. Switch the ignition to ON and verify that the ABS warning light goes out after approx. 3.0 s.

3. Switch the ignition to off.

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.

ABS Control Inspection

1. Perform "Preparation".

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

3. Set up an active command mode inspection according to the combination of commands below. (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)] ). Brake pressure retention

Mazda 2. DSC SYSTEM INSPECTION

Mazda 2. DSC SYSTEM INSPECTION

Brake pressure reduction

Mazda 2. DSC SYSTEM INSPECTION

Mazda 2. DSC SYSTEM INSPECTION

CAUTION:

NOTE:

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

5. When brake pressure is maintained and a DSC HU/CM operation click sound is heard, confirm that the wheel does not rotate. When brake pressure is being reduced and a DSC HU/CM operation click sound is heard, confirm that the wheel rotates.

DSC Control Inspection

1. Perform "Preparation".

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

3. Set up an active command mode inspection according to the combination of commands below. (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)] ).

CAUTION:

Mazda 2. DSC SYSTEM INSPECTION

Mazda 2. DSC SYSTEM INSPECTION

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 HU/CM operation click sound is heard.

DSC HU/CM REMOVAL/INSTALLATION

CAUTION:

NOTE:

1. Remove the installation nut for the cooler hose (LO) bracket and set the cooler hose (LO) aside. (See REFRIGERANT LINE REMOVAL/INSTALLATION).

Mazda 2. DSC HU/CM REMOVAL/INSTALLATION

2. Remove in the order indicated in the table.

3. Install in the reverse order of removal.

4. Add brake fluid, bleed the brakes, and inspect for leakage after the installation has been completed. (See BRAKE FLUID AIR BLEEDING).

5. Switch the ignition to ON or start the engine, and maintain this condition for approx. 30 s to allow the DSC HU/CM automatic configuration to be performed.

6. Perform the DSC sensor initialization procedures. (See DSC SENSOR INITIALIZATION PROCEDURE).

7. Perform the DTC inspection using the M-MDS. (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)] ).

Mazda 2. DSC HU/CM REMOVAL/INSTALLATION

  1. Connector
  2. Brake pipe
  3. DSC HU/CM component

Mazda 2. DSC HU/CM REMOVAL/INSTALLATION

  1. Bracket
  2. DSC HU/CM
  3. DSC CM
  4. DSC HU

Connector Removal Note

1. Pull the connector cover up in the direction of the arrow while pressing the connector cover tab.

Mazda 2. DSC HU/CM REMOVAL/INSTALLATION

2. Pull the connector toward the vehicle left ward and remove it.

CAUTION:

Brake Pipe Removal Note

1. Place an alignment mark on the brake pipe and DSC HU/CM.

Mazda 2. DSC HU/CM REMOVAL/INSTALLATION

2. Affix protective tape to the connector to prevent brake fluid from entering.

3. Remove the brake pipe.

4. Adhere protective tape to the installation area of the DSC HU/CM brake pipe to prevent foreign material penetration.

Brake Pipe Installation Note

1. Align the marks made before removal and install the brake pipe into the DSC HU/CM referring to the figure.

Mazda 2. DSC HU/CM REMOVAL/INSTALLATION

Connector Installation Note

1. After connecting the connector, verify that the connector cover is completely pushed in.

Mazda 2. DSC HU/CM REMOVAL/INSTALLATION

DSC SENSOR INITIALIZATION PROCEDURE

WARNING:

1. Inspect the wheel alignment and the tire pressure.

2. Park the vehicle on level ground.

3. Switch the ignition to off.

4. Connect the M-MDS (IDS) to DLC-2.

5. After the vehicle is identified, select the following items from the initial screen of the IDS.

6. Then, select an item from the screen menu.

7. Perform the procedure according to the directions on the screen.

8. Drive the vehicle.

9. After 5 min or more of driving, verify that the DSC system is normal.

DSC HU/CM INSPECTION

1. Disconnect the DSC HU/CM connector. (See DSC HU/CM REMOVAL/INSTALLATION).

2. Connect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION).

3. Attach the tester lead to the DSC HU/CM wiring harness-side connector and inspect the voltage, continuity, or resistance according to the standard (reference value) in the table below.

Standard (Reference)

Mazda 2. DSC HU/CM INSPECTION

Mazda 2. DSC HU/CM INSPECTION

Mazda 2. DSC HU/CM INSPECTION

Mazda 2. DSC HU/CM INSPECTION

Mazda 2. DSC HU/CM INSPECTION

FRONT ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION

1. Remove in the order indicated in the table.

2. Install in the reverse order of removal.

3. After installation, verify that there is no twisting in the ABS wheel-speed sensor.

Mazda 2. FRONT ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION

  1. Connector
  2. Front ABS wheel-speed sensor
  3. Clip

Connector Removal Note

1. Peel back the mudguard and disconnect the connector and ABS wheel-speed sensor wiring harness clip (vehicle side).

Front ABS Wheel-Speed Sensor Removal Note

1. Remove the brake hose installation bolt shown in the figure, then remove the brake hose bracket from the shock absorber.

Mazda 2. FRONT ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION

2. Remove the ABS wheel-speed sensor installation bolt, then remove the ABS wheel-speed sensor from the steering knuckle.

3. Remove the bolts and nuts shown in the figure, then disconnect the steering knuckle from the shock absorber.

Mazda 2. FRONT ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION

4. While pressing the tabs (2 locations) of the ABS wheel-speed sensor wiring harness clip (shock absorber side), remove the ABS wheel-speed sensor wiring harness from the shock absorber.

Mazda 2. FRONT ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION

5. Remove the ABS wheel-speed sensor wiring harness grommet from the shock absorber.

6. Remove the ABS wheel-speed sensor.

7. Install the steering knuckle to the shock absorber, insert the bolts from the direction shown as follows, then tighten them to the specified torque.

Mazda 2. FRONT ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION

8. Install the brake hose bracket to the shock absorber, then tighten the bolt to the specified torque.

Mazda 2. FRONT ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION

Clip Removal Note

NOTE:

1. Cut the band area of the clip, then remove the clip from the ABS wheel-speed sensor.

CAUTION:

Clip Installation Note

1. Install the clip to the ABS wheel-speed sensor as shown in the figure.

Mazda 2. FRONT ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION

2. Cut the remaining band of the clip.

FRONT ABS WHEEL-SPEED SENSOR INSPECTION

Sensor Output Value Inspection

CAUTION:

1. Switch the ignition to off.

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

3. Select the following PIDs using the M-MDS:

4. Start the engine and drive the vehicle.

5. Verify that the display of the M-MDS shows the same value as the speedometer.

Installation Visual Inspection

1. Inspect the following items:

  1. Is there any looseness or play?
  2. Has the sensor been deformed?

Clearance Inspection

Preparation prior to inspection

1. Remove the ABS wheel-speed sensor. (See FRONT ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION).

2. Remove the wheel hub, steering knuckle component. (See WHEEL HUB, STEERING KNUCKLE REMOVAL/INSTALLATION).

3. Install the ABS wheel-speed sensor to the removed wheel hub, steering knuckle component, and tighten to the specified torque.

Mazda 2. FRONT ABS WHEEL-SPEED SENSOR INSPECTION

Tightening torque

Clearance Inspection

1. Measure the gap between the ABS sensor rotor and ABS wheel-speed sensor using a feeler gauge.

Mazda 2. FRONT ABS WHEEL-SPEED SENSOR INSPECTION

Clearance

Servicing after inspection

1. Remove the ABS wheel-speed sensor from the wheel hub, steering knuckle component.

2. Install the wheel hub, steering knuckle component. (See WHEEL HUB, STEERING KNUCKLE REMOVAL/INSTALLATION).

3. Install the ABS wheel-speed sensor. (See FRONT ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION).

4. Inspect the front wheel alignment. (See FRONT WHEEL ALIGNMENT).

REAR ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION

1. Remove the rear scuff plate. (See REAR SCUFF PLATE REMOVAL/INSTALLATION).

2. Remove the rear seat cushion. (See REAR SEAT CUSHION REMOVAL/INSTALLATION).

3. Remove the rear seat back. (See REAR SEAT BACK REMOVAL/INSTALLATION).

4. Remove the trunk end trim. (See TRUNK END TRIM REMOVAL/INSTALLATION).

5. Remove the trunk side trim. (See TRUNK SIDE TRIM REMOVAL/INSTALLATION).

6. Disconnect the rear ABS wheel-speed sensor connector.

Mazda 2. REAR ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION

7. Press the rear ABS wheel-speed sensor tabs and press out the sensor toward the outside of the vehicle.

8. Remove in the order indicated in the table.

9. Install in the reverse order of removal.

Mazda 2. REAR ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION

  1. Bolt
  2. Rear ABS wheel-speed sensor

REAR ABS WHEEL-SPEED SENSOR INSPECTION

Installation Visual Inspection

1. Inspect the following items:

  1. Is there looseness or play in the sensor installation?
  2. Has the sensor been deformed?
  3. Is there deformation of or damage to the ABS sensor rotor?

Clearance inspection

1. Remove the rear ABS wheel-speed sensor.

2. Measure the distance between the rear ABS wheel-speed sensor installation surface and the ABS sensor rotor. This is dimension A.

Mazda 2. REAR ABS WHEEL-SPEED SENSOR INSPECTION

3. Calculate the clearance between the rear ABS wheel-speed sensor and the ABS sensor rotor using the following formula:

4. Verify that the clearance between the ABS sensor rotor and the rear ABS wheel-speed sensor is as indicated below.

Clearance

Sensor Output Value Inspection

CAUTION:

1. Switch the ignition to off.

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

3. Select the following PIDs using the M-MDS:

4. Start the engine and drive the vehicle.

5. Verify that the display of the M-MDS shows the same value as the speedometer.

BRAKE FLUID PRESSURE SENSOR INSPECTION

1. Switch the ignition to off.

2. Disconnect the brake pipe flare nut.

Mazda 2. BRAKE FLUID PRESSURE SENSOR INSPECTION

3. Remove the clip and disconnect the brake hose.

4. Install the SSTs to the brake pipe as shown in the figure.

Mazda 2. BRAKE FLUID PRESSURE SENSOR INSPECTION

5. Perform air bleeding of the SST and brake line from bleeder screw A.

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

7. Select the "MCYLI_P" PID. (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)] ).

8. Start the engine.

9. Depress the brake pedal, and verify that the fluid pressure value of the SST (gauge) and the value shown on the M-MDS are equal.

10. Remove the SSTs after the inspection and install the brake hose, clip and brake pipe to their original positions. (See BRAKE HOSE (FRONT) REMOVAL/INSTALLATION).

11. Perform air bleeding of the brake line. (See BRAKE FLUID AIR BLEEDING).

DSC OFF SWITCH REMOVAL/INSTALLATION

1. Remove the switch panel in the direction of the arrow shown in the figure.

Mazda 2. DSC OFF SWITCH REMOVAL/INSTALLATION

2. Disconnect the connector.

3. Press the tabs in the direction of the arrow (1) shown in the figure and remove the DSC OFF switch in the direction of the arrow (2).

Mazda 2. DSC OFF SWITCH REMOVAL/INSTALLATION

4. Install in the reverse order of removal.

DSC OFF SWITCH INSPECTION

1. Remove the DSC OFF switch. (See DSC OFF SWITCH REMOVAL/INSTALLATION).

2. Verify that the continuity between the DSC OFF switch terminals is as indicated in the table.

Mazda 2. DSC OFF SWITCH INSPECTION

Mazda 2. DSC OFF SWITCH INSPECTION

3. Apply battery voltage to DSC OFF switch terminal E, and connect terminal A to ground.

4. Verify that the LED illuminates.

BRAKES TECHNICAL DATA

Mazda 2. BRAKES TECHNICAL DATA

Standard power brake unit non-servo operation

Mazda 2. BRAKES TECHNICAL DATA

Standard power brake unit servo operation

Mazda 2. BRAKES TECHNICAL DATA

BRAKES SST

Mazda 2. BRAKES SST

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