DTC C0030:07/C0031:07/C0031:29/C0031:2F/C0031:64/C0033:07/C0034:07/C0034:29/C0034:2F/C0034:64/C0036:07/C0037:07/C0037:29/C0037:2F/C0037:64/C0039:07/C003A:07/C003A:29/C003A:2F/C003A:64 [DYNAMIC STABILITY CONTROL (DSC)]

id0402b2906100

Note
•  When only the driving wheels are rotated while the vehicle is jacked up, DTCs C0037:29 and C003A:29 are input to the memory.

DTC
C0030:07
LF ABS sensor rotor
C0031:07, C0031:29, C0031:2F, C0031:64
LF ABS wheel-speed sensor/ABS sensor rotor
C0033:07
RF ABS sensor rotor
C0034:07, C0034:29, C0034:2F, C0034:64
RF ABS wheel-speed sensor/ABS sensor rotor
C0036:07
LR ABS sensor rotor
C0037:07, C0037:29, C0037:2F, C0037:64
LR ABS wheel-speed sensor/ABS sensor rotor
C0039:07
RR ABS sensor rotor
C003A:07, C003A:29, C003A:2F, C003A:64
RR ABS wheel-speed sensor/ABS sensor rotor
DETECTION CONDITION
•  C0030:07, C0033:07, C0036:07, C0039:07
―  Periodic abnormality is detected in the signal wave pattern from the ABS wheel-speed sensors.
•  C0031:07, C0034:07, C0037:07, C003A:07
―  While the vehicle is traveling at a speed of 10 km/h {6.2 mph} or more, no signal in any of the four wheels or an extremely low vehicle speed signal is detected.
•  C0031:29, C0034:29, C0037:29, C003A:29
―  The wheel-speed signal is not input or an extremely low wheel-speed signal is detected from any of the four wheels when driving at a vehicle speed of 10 km/h {6.2 mph} or more
•  C0031:2F, C0034:2F, C0037:2F, C003A:2F
―  The wheel speed or acceleration speed in any of the 4 wheels is not within the specification.
―  ABS control continues to operate for 28 s or more.
•  C0031:64, C0034:64, C0037:64, C003A:64
―  While the vehicle is traveling at a speed of 20 km/h {12 mph} or more, an extremely high vehicle speed signal in any of the four wheels is detected.
FAIL-SAFE FUNCTION
•  Illuminates the ABS warning light, TCS/DSC indicator light, Mazda Radar Cruise Control (MRCC) warning light*1, and Smart Brake Support/Smart City Brake Support (SBS/SCBS) indicator light (amber)*1.
•  Tire pressure monitoring system warning light illuminates after flashes.
•  Inhibits the ABS, TCS, DSC, brake assist control, vehicle roll prevention function*1, Hill Launch Assist (HLA), TPMS, Secondary Collision Reduction (SCR)*1, Mazda Radar Cruise Control (MRCC)*1, Smart Brake Support (SBS)*1, and Smart City Brake Support (SCBS)*1 controls.
(Additionally, when any malfunction is detected in two wheels or more, EBD control is inhibited and the brake system warning light is illuminated.)
*1: If equipped.
POSSIBLE CAUSE
•  ABS sensor rotor malfunction (missing ABS sensor rotor teeth due to foreign material obstruction)
•  ABS wheel-speed sensor or ABS sensor rotor installation malfunction (If the ABS sensor rotor is installed at an angle, it may cause output of abnormal wave pattern at high speeds.)
•  Excessive clearance between the ABS wheel-speed sensor and sensor rotor
•  ABS wheel-speed sensor malfunction
•  Continuous ABS operation
•  DSC HU/CM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
INSPECT PID FOR ABS WHEEL-SPEED SENSOR OUTPUT ERROR USING M-MDS
•  Switch the ignition to off.
•  Connect the M-MDS to the DLC-2.
•  Select the following PIDs using the M-MDS:
―  WSPD_SEN_LF
―  WSPD_SEN_LR
―  WSPD_SEN_RF
―  WSPD_SEN_RR
•  Drive the vehicle.
•  Verify that the vehicle speeds detected by the four ABS wheel-speed sensors are approximately the same.
•  Are the vehicle speeds approximately the same?
Yes
Go to Step 3.
No
Go to the next step.
2
INSPECT FOR SHORT TO GROUND BETWEEN ABS WHEEL-SPEED SENSOR CONNECTORS AND GROUND
•  Disconnect the ABS wheel-speed sensor connectors.
•  Inspect for no continuity between the following ABS wheel-speed sensor connector terminals (vehicle harness-side) and body ground:
―  ABS wheel-speed sensor (RF): A—Body ground
―  ABS wheel-speed sensor (LF): A—Body ground
―  ABS wheel-speed sensor (RR): B—Body ground
―  ABS wheel-speed sensor (LR): B—Body ground
•  Is the continuity normal?
Yes
Go to the next step.
No
Refer to the wiring diagram and verify whether or not there is a common connector between the DSC HU/CM connector terminals (vehicle harness-side) and the following vehicle harness-side connector terminals of the ABS wheel-speed sensors:
•  RF ABS wheel-speed sensor(-): C—A
•  LF ABS wheel-speed sensor(-): AJ—A
•  RR ABS wheel-speed sensor(-): X—B
•  LR ABS wheel-speed sensor(-): O—B
If there is a common connector:
•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has a short to ground.
Go to Step 5.
3
INSPECT IF MALFUNCTION OCCURRED DUE TO IMPROPER SENSOR CLEARANCE.
•  Inspect the clearance between the ABS wheel-speed sensor and the ABS sensor rotor.
•  Is the clearance normal?
Yes
Go to the next step.
No
Replace the ABS wheel-speed sensor, then go to Step 5.
(See FRONT ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION.)
(See REAR ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION.)
4
VISUALLY INSPECT ABS SENSOR ROTOR FOR FOREIGN MATERIAL ADHERING OR IMPROPER INSTALLATION
•  Is the result normal?
Yes
Go to the next step.
No
Repair or replace the ABS sensor rotor, then go to the next step.
•  Front ABS sensor rotor (front wheel hub)
•  Rear ABS sensor rotor (rear wheel hub)
5
VERIFY THAT THE SAME DTC IS NOT PRESENT
•  Reconnect all disconnected connectors.
•  Clear the DTCs from the memory.
•  Start the engine and drive the vehicle at 20 km/h {12 mph} or more.
•  Are the same DTCs present?
Yes
Repeat the inspection from Step 1.
If the malfunction recurs, replace the DSC HU/CM, then go to the next step.
(See DSC HU/CM REMOVAL/INSTALLATION.)
No
Go to the next step.
6
VERIFY THAT NO OTHER DTCS ARE PRESENT
•  Are any other DTCs output?
Yes
Go to the applicable DTC inspection.
(See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].)
No
DTC troubleshooting completed.