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2008 - MX-5 - Brakes

NO.10 ABS OR TCS*1 OPERATES FREQUENTLY/TCS DOES NOT WORK CORRECTLY*1: DSC SYSTEM FUNCTION CONTAINS TRACTION CONTROL FUNCTION, DSC INDICATOR LIGHT GOES ON AND OFF WHILE TCS IS OPERATING



10

ABS or TCS (*1) operates frequently./TCS does not work correctly.

(*1): DSC system function contains traction control function; DSC indicator light goes on and off while TCS is operating.

[TROUBLESHOOTING HINTS]

  • There is a difference in size or air pressure between the front and rear tires

  • Incorrect ABS wheel-speed signal is input to DSC HU/CM

  • There is a malfunction in the engine control system (TCS malfunction)


Diagnostic procedure

STEP

INSPECTION

ACTION

1

INSPECT DTCS IN DSC HU/CM
  • Inspect the DTC for the DSC ON-BOARD DIAGNOSTIC SYSTEM.

  • Have DTCs been stored in memory?

Yes

Perform the applicable DTC inspection.

(See ON-BOARD DIAGNOSIS[DYNAMIC STABILITY CONTROL (DSC)].)

No

Go to the next step.

2

INSPECT TIRE SIZE AND AIR PRESSURE
  • Inspect the tire size and the air pressure.

  • Are size and air pressure as specified?

Yes

Go to the next step.

No

Replace with specified tires and adjust tire air pressure.

3

INSPECT ABS WHEEL-SPEED SENSOR OUTPUT VALUE

Yes

Find that malfunctioning part according to “INTERMITTENT CONCERN TROUBLESHOOTING”.

No

  • ABS wheel-speed sensor installation inspection:

    Inspect the sensor for looseness and verify that it is securely installed.

  • Sensor rotor installation inspection:

    Inspect the sensor rotor for poor installation and chipping of sensor rotor teeth. (If sensor rotor is installed poorly, it may cause output of abnormal wave form at high speed.)




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