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2008 - MX-5 - Brakes

DTC C1141, C1142, C1143, C1144 [DYNAMIC STABILITY CONTROL (DSC)]



DTC

C1141

C1142

C1143

C1144

LF ABS sensor rotor system

RF ABS sensor rotor system

LR ABS sensor rotor system

RR ABS sensor rotor system

DETECTION CONDITION

  • Periodic abnormality is detected in the signal wave pattern from the ABS wheel-speed sensors.

POSSIBLE CAUSE

  • ABS wheel-speed sensor malfunction

  • ABS sensor rotor malfunction (foreign material adhering)

  • Improper installation of ABS wheel-speed sensor and/or sensor rotor

  • Excessive clearance between the ABS wheel-speed sensor and sensor rotor


Diagnostic procedure

STEP

INSPECTION

ACTION

1

INSPECT PID FOR ABS WHEEL-SPEED SENSOR OUTPUT ERROR USING M-MDS
  • Turn the ignition switch off.

  • Connect the M-MDS to the DLC-2.

  • Select the following PIDs using the M-MDS:

    LF_WSPD

    LR_WSPD

    RF_WSPD

    RR_WSPD

  • 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 4.

No

Go to the next step.

2

INSPECT IF MALFUNCTION OCCURRED DUE TO IMPROPER SENSOR CLEARANCE.

Yes

Go to the next step.

No

Replace the ABS wheel-speed sensor, then go to Step 4.

(See FRONT ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION.)

(See REAR ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION.)

3

VISUALLY INSPECT ABS SENSOR ROTOR FOR FOREIGN MATERIAL ADHERING OR IMPROPER INSTALLATION
  • Is the result normal?

Yes

Go to the next step.

No

Replace the front wheel hub component or rear drive shaft, then go to the next step.

(See WHEEL HUB, STEERING KNUCKLE REMOVAL/INSTALLATION.)

(See REAR DRIVE SHAFT REMOVAL/INSTALLATION.)

4

VERIFY THAT THE SAME DTC IS NOT 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.

5

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.




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