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

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)

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.
1		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)].)
2		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.
3		No	Go to the next step.
4	INSPECT BATTERY Is the battery voltage normal?	Yes	Go to the next step.
4	INSPECT BATTERY Is the battery voltage normal?	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.
5		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.
6		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.)
7		No	Securely connect the DSC HU/CM connector terminal and related connector terminals.

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