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Mazda 3 Service Manual: Precaution [Dynamic Stability Control (DSC)]

Mazda 3 Service Manual / Brakes / Brake Control, Vehicle Dynamics / Precaution [Dynamic Stability Control (DSC)]

1. The ABS warning light and/or brake system warning light and/or DSC indicator light and/or DSC OFF light illuminate even when the system is normal.

Warning lights that may illuminate and/or flash

Cases in which the light may illuminate

Conditions in which the light will go out

ABS, EBD, TCS and DSC control

  • ABS warning light

  • Brake system warning light*1

  • DSC indicator light

  • DSC OFF light

Only the front wheels rotate under the following condition while jacked up, stuck or on the chassis dynamometer:

  • Detected 8 times

    for a continuous 20 s

    while at a vehicle speed of 20 km/h {12.4 mph} or more

    (one detection period is when ignition is switched from ON to off).

After turning off the ignition once and then restarting the engine, the vehicle is driven at 10km/h {6.2 mph} or more

, and then normal operation is verified.

  • ABS: Cuts control

  • EBD: Cuts control

  • TCS: Cuts control

  • DSC: Cuts control

Parking brake is not fully released while driving.

Brake drag.

Sudden acceleration/deceleration.

Left/right or front/rear tires are different. (Size, radius, tire pressure or wear is other than that listed on tire label.)

Battery voltage at DSC HU/CM ignition terminal Y drops below about 9.5 V

*2.

Battery voltage rises above about 9.5 V

.

  • ABS: Operates control

  • EBD: Operates control

  • TCS: Operates control

  • DSC: Operates control

  • Brake system warning light

  • DSC indicator light

  • DSC OFF light

Brake fluid amount is low.

Brake fluid level lower than recommended amount.

  • ABS: Operates control

  • EBD: Operates control

  • TCS: Cuts control

  • DSC: Cuts control

  • Brake system warning light

Brake switch signal error (stuck at on/off)

Normal operation of brake switch signal is verified

  • ABS: Operates control

  • EBD: Operates control

  • TCS: Operates control

  • DSC: Operates control


*1 In case where the light may illuminate, only when DSC HU/CM detects that a wheel-speed sensor determines that more than two wheels are malfunctioning.

*2 If battery voltage drops below 10 V

while vehicle speed is greater than 3 km/h {2 mph}

, DSC HU/CM detects DTC U3003:16.

2. Precautions during servicing of DSC. The DSC is composed of electrical and mechanical parts. It is necessary to categorize malfunctions as being either electrical or hydraulic when performing troubleshooting.

a. Malfunction in electrical system

b. Malfunctions in hydraulic system

Intermittent Concern Troubleshooting

Vibration method

NOTE:

Inspection method for switch connectors or wires

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

2. Switch the ignition to ON (engine off).

NOTE:

3. Access the PIDs for the switch you are inspecting.

4. Turn switch on manually.

5. Shake each connector or wire harness a bit vertically and horizontally while monitoring the PID.


Inspection method for sensor connectors or wires

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

2. Switch the ignition to ON (engine off).

NOTE:

3. Access the PIDs for the switch you are inspecting.

4. Shake each connector or wire harness a bit vertically and horizontally while monitoring the PID.


Inspection method for sensors

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

2. Switch the ignition to ON (engine off).

NOTE:

3. Access the PIDs for the switch you are inspecting.

4. Vibrate the sensor slightly with your finger.

Malfunction data monitor method

1. Perform malfunction reappearance test according to malfunction reappearance mode and malfunction data monitor. The malfunction cause is found in the malfunction data.

Connector terminal check method

1. Check the connection condition of each female terminal.

2. Insert a male terminal to the female terminal and inspect the female terminal for looseness.


DSC Sensor Initialization Procedure
WARNING: If the DSC sensor initialization procedure is not completed, the DSC will not operate properly and it might cause an unexpected accident. Therefore, after replacing or removing ...

ABS
...

Other materials:

Engine Oil Level Inspection [Mzr 2.0, Mzr 2.5]
1. Position the vehicle on level ground. 2. Warm up the engine. 3. Stop the engine and allow at least 5 min before continuing. 4. Remove the dipstick, wipe it cleanly, and reinstall it fully. 5. Remove the dipstick and verify that the oil level is between the F and L marks on the dipstick. ...

Base Removal
1. Remove the rearview mirror.. 2. Wind each end of a wire around a bar. WARNING: Using the piano wire with bare hands can cause injury. Always wear gloves when using the piano wire. NOTE: Use a long sawing action to spread the work over the whole length of the pi ...

Antilock Brake System (ABS)
The ABS control unit continuously monitors the speed of each wheel. If one wheel is about to lock up, the ABS responds by automatically releasing and reapplying that wheel's brake. The driver will feel a slight vibration in the brake pedal and may hear a chattering noise from the brake syst ...

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