Mazda 5 Technical Guide Brakes

Online PDF Mazda 5 Technical Guide Brakes

BRAKE FEATURES
Improved safety

  1. Intrusion minimizing brake pedal adopted
  2. Large power brake unit (10 inch) with attached mechanical brake assist mechanism adopted 
  3. Electronic brakeforce distribution (EBD) control adopted
  4. ABS adopted
  5. Dynamic stability control (DSC) adopted

Improved braking force

  1. Large diameter front disc brakes adopted
  2. Large diameter rear disc brakes adopted
  3. Vacuum pump adopted (MZR-CD (RF Turbo))

Improved serviceability

  1. Combined sensor integrating yaw rate and lateral-G sensors adopted
  2. Enhanced malfunction diagnosis system for use with WDS or equivalent

Improved operability: Center lever type parking brake, adjustable from vehicle interior, adopted
Size and weight reduction

  1. Integrated construction of the hydraulic unit (HU) and control module (CM) adopted for the ABS HU/CM and DSC HU/CM
  2. Semi-conductor element type ABS wheel-speed sensor adopted
  3. Magnetic encoder type ABS sensor rotor adopted

Improved brake pedal operability: A master cylinder with smaller diameter long-stroke type has been adopted

ON-BOARD DIAGNOSTIC SYSTEM OUTLINE [ABS, DYNAMIC STABILITY CONTROL (DSC)]

  1. The on-board diagnostic system consists of a malfunction detection system that detects abnormalities in input/ output signals when the ignition switch is at the ON position, a data monitor function that reads out specified input/output signals and a active command modes function that allows for override operation of output parts (such as solenoid valves).
  2. The data link connector 2 (DLC-2), which groups together all the connectors used for malfunction diagnosis and detecting/repair into a single location, has been adopted, thereby improving serviceability. Diagnosis is performed by connecting the WDS or equivalent to the DLC-2.
  3. In addition to DTC read-out, the WDS or equivalent is used to clear DTCs using the display screen of the diagnostic tester, and to access the PID/data monitor and active command modes functions, providing enhanced malfunction diagnosis and improved serviceability.

Malfunction detection function

The malfunction detection function detects malfunctions in the input/output signal system of the ABS HU/CM (vehicles with ABS) or DSC HU/CM (vehicles with DSC) when the ignition switch is at the ON position.

When the ABS HU/CM and DSC HU/CM are started up, the following malfunction detections are performed. ABS HU/CM
The ABS and brake system warning lights illuminate for approx. 3.0 s when the ignition switch is turned to the ON position to inspect for open circuits in the lights. At the same time, the fail-safe relay is operated, and the input/output signals of each part is monitored for malfunction diagnosis. After starting to drive, the first time the vehicle speed is approx. 10 km/h {6.2 mph} or more the pump motor is operated and malfunction diagnosis is performed again. Input/output signals are monitored for malfunction determination when the ignition switch is at the ON position.
DSC HU/CM

The ABS and brake system warning lights, and DSC indicator lights illuminate for approx. 3.0 s and the DSC OFF light illuminates for approx. 1.8 s when the ignition switch is turned to the ON position to inspect for open circuits in the lights. At the same time, the fail-safe relay is operated, and the input/output signals of each part is monitored for malfunction diagnosis. After starting to drive, the first time the vehicle speed is approx. 10 km/h {6.2 mph} or more the pump motor is operated and malfunction diagnosis is performed again. Input/output signals are monitored for malfunction determination when the ignition switch is at the ON position.

When malfunctions are detected, the corresponding lights are illuminated to alert the driver. Using the external tester communication function, DTCs can be output through the CAN_H and CAN_L of the DLC-2. At the same time, malfunction detection results are sent to the memory and fail-safe functions.
Memory function

The memory function stores DTCs of malfunctions in input/output signal systems. With this function, once a DTC is stored it is not cleared after the ignition switch has been turned off (LOCK position), even if the malfunctioning signal system has returned to normal.

Since the ABS and DSC control modules have built-in non-volatile memory, DTCs are not cleared even if the battery is removed. Therefore, it is necessary to clear the memory after performing repairs. Refer to the Workshop Manual for the DTC clearing procedure.
Fail-safe function

When the malfunction detection function determines a malfunction, each light illuminates to advise the driver. At this time, the fail-safe function controls the ABS, EBD, TCS* and DSC* as shown in the fail-safe function malfunction contents table.
*: Only vehicles with DSC Warning

If EBD control is suspended the rear wheels could lock-up before the front wheels. If this occurs, the vehicle could swerve and become unstable. Therefore always inspect the system immediately if EBD control is suspended.
Fail-safe Function Malfunction Contents (Vehicles With ABS)

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