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2008 - MX-5 - Brakes

NO.8 ANY OF THE FOLLOWING LIGHTS REMAIN ON: (ABS WARNING LIGHT, BRAKE SYSTEM WARNING LIGHT, DSC INDICATOR LIGHT AND/OR DSC OFF LIGHT)



8

Any of the following lights remain on: (ABS warning light, BRAKE system warning light, DSC indicator light and/or DSC OFF light)

[TROUBLESHOOTING HINTS]

  • Brake fluid amount is low

  • Parking brake does not release

  • No connection at DSC HU/CM connector

    (When DSC HU/CM connector is disconnected, ABS warning light and BRAKE system warning light illuminate)

  • DSC HU/CM detected malfunction (Input and output device malfunction)

  • DSC HU/CM detects low voltage in power supply

  • DSC HU/CM ground malfunction

    (When DSC HU/CM ground is not securely connected, ABS warning light and BRAKE system warning light illuminate but diagnostic trouble code does not displayed)

  • DSC HU/CM does not operate (DSC HU/CM malfunction)


Diagnostic procedure

STEP

INSPECTION

ACTION

1

INSPECT BRAKE FLUID AMOUNT AND VERIFY THAT PARKING BRAKE RELEASES
  • Is the brake fluid amount normal?

  • Is the parking brake lever released?

Yes

Go to the next step.

No

Add brake fluid or release parking brake lever.

2

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

  • Have DTCs been stored in memory?

Yes

Perform inspection using appropriate DTC.

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

No

Go to the next step.

3

INSPECT WHETHER MALFUNCTION IS IN CONTROL MODULE CONNECTOR, TERMINAL OR OTHER
  • Do the ABS warning light and BRAKE system warning light go out after 4 s when the ignition switch is turned to the ON position?

Yes

Temporary poor connection in control module connector.

Inspect DSC HU/CM connector, then go to Step 6.

Inspect DSC HU/CM connector terminal, then go to Step 7.

No

Go to the next step.

4

INSPECT BATTERY
  • Is the battery voltage normal?

Yes

Go to the next step.

No

Inspect the battery and charging system.

(See BATTERY INSPECTION [LF].)

(See GENERATOR INSPECTION [LF].)

5

INSPECT CHARGING SYSTEM
  • Is the battery voltage normal with electrical load (A/C, headlight, etc.) on and engine idling?

Yes

Go to the next step.

No

Inspect the charging system (drive belt tension, generator, etc.).

(See GENERATOR INSPECTION [LF].)

6

VERIFY THAT DSC HU/CM CONNECTOR IS CONNECTED
  • Is the DSC HU/CM securely connected?

Yes

Go to the next step.

No

Connect the DSC HU/CM connector securely, then go to the next step.

7

VERIFY THAT DSC HU/CM CONNECTOR TERMINAL OR RELATED CONNECTOR TERMINALS ARE CONNECTED
  • Are the DSC HU/CM connector terminal or instrument cluster connector terminal etc. related connector terminals securely connected?

Yes

Replace the DSC HU/CM.

(See DSC HU/CM REMOVAL/INSTALLATION.)

No

Securely connect the DSC HU/CM connector terminal and related connector terminals.




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