Dynamic Stability Control System: Other Mazda RX-8 I

Preparation

1. Verify that battery is fully charged.
2. Turn the ignition switch to the ON position, and verify that the ABS warning light goes out after approximately 3 seconds.
3. Turn the ignition switch 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. If there is any brake drag, perform regular brake inspection. If there is no brake drag, perform DSC HU/CM operation inspection.

Scheme 121

Scheme 122

Scheme 123

1. Perform "Preparation".
2. Connect the WDS or equivalent to the DLC-2.
3. Set up an active command mode inspection according to the combination of commands below. Brake pressure retention Brake pressure reduction 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.
4. Send the command while depressing on the brake pedal and attempting to rotate the wheel being inspected.
5. While brake pressure is maintained and a DSC HU/CM operation click sound is head, 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

Scheme 124

Scheme 125

1. Perform "Preparation".
2. Connect the WDS or equivalent to the DLC-2.
3. 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 seconds or less each time they are switched on.
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. 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

Scheme 126

1. Turn the ignition switch off.
2. Connect the WDS or equivalent to the DLC-2.
3. Input vehicle information following the directions on the screen of the WDS or equivalent.
4. Select "Module programming" from the WDS or equivalent menu.
5. Select "Programmable Module Installation".
6. Select "ABS/TCS".
7. Clear DTCs using the WDS or equivalent, then verify that there is no DTC present.

COMBINED SENSOR INITIALIZATION PROCEDURE

Scheme 127

1. Inspect the wheel alignment and inflation pressure. If there is any malfunction, adjust the applicable part.
2. Park the vehicle on level ground.
3. Turn the ignition switch off.
4. Connect the WDS or equivalent to the DLC-2.
5. Access the active command mode, select the following commands, and then follow the indication on the monitor. YAWRATE (Yaw rate) LATACCEL (Lateral acceleration)
6. Drive the vehicle forward.
7. After 5 min of driving, verify that the DSC system is normal.

Scheme 128

Scheme 129

Scheme 130

1. Turn the ignition switch to the ON position, then measure the voltage between brake fluid pressure sensor terminal C and ground. If there is any malfunction, inspect the wiring harness between brake fluid pressure sensor terminal C and DSC HU/CM terminal C, then repair or replace if necessary. Standard voltage 4.75-5.25 V
2. Measure the voltage between brake fluid pressure sensor terminal A and the ground. If there is any malfunction, inspect the wiring harness between brake fluid pressure sensor terminal A and DSC HU/CM terminal E, then repair or replace if necessary. Standard voltage 0 V
3. Turn the ignition switch off.
4. Install the SSTs to the master cylinder. NOTE: Install the SST (49 D043 002) to the master cylinder using a commercially available flare nut wrench. Flare nut across flat: 12 mm {0.47 in}
5. Bleed the air from the SSTs and the brake line. (Bleed air from the SSTs through air bleeding valve A.)
6. Connect the WDS or equivalent to the DLC-2.
7. Select the MCYLIP PID.
8. Start the engine.
9. Depress the brake pedal, and confirm that the fluid pressure value of the SST (Gauge) and the value shown on the WDS or equivalent are equal. If the fluid pressures are different, replace the DSC HU/CM.

STEERING ANGLE SENSOR INITIALIZATION PROCEDURE

Note. The steering angle sensor requires battery power to store the steering angle initial position. Therefore when the battery power supply is cut off, a stored steering angle initial position is cleared.

1. Inspect the wheel alignment, inflation pressure, and the installation condition of the steering wheel. If there is any malfunction, adjust the applicable part.
2. Connect the negative battery cable.
3. Turn the ignition switch to the ON position.
4. Confirm that the DSC indicator light illuminates and that the DSC OFF light flashes.
5. Turn the steering wheel to full right lock, then turn it to full left lock.
6. Confirm that the DSC OFF light goes out.
7. Turn the ignition switch off.
8. Turn the ignition switch to the ON position again, and confirm that the DSC indicator light goes out. If the DSC indicator light does not go out, disconnect the negative battery, cable and perform the procedure again starting from Step 2 shown above.
9. Drive the vehicle for approx. 10 min. and confirm that the ABS warning and DSC indicator lights do not illuminate.

Scheme 131

Scheme 132

1. Remove in the order indicated. (Scheme 131)
2. Install in the reverse order of removal.