NO.6 DSC*2 OPERATES FREQUENTLY/DSC DOES NOT WORK CORRECTLY *2: TCS/DSC INDICATOR LIGHT TURNS ON AND OFF WHILE DSC OPERATES [DYNAMIC STABILITY CONTROL (DSC)]

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2014 - Mazda6 - Brakes

NO.6 DSC2 OPERATES FREQUENTLY/DSC DOES NOT WORK CORRECTLY 2: TCS/DSC INDICATOR LIGHT TURNS ON AND OFF WHILE DSC OPERATES [DYNAMIC STABILITY CONTROL (DSC)]


6	DSC^2 operates frequently DSC does not work correctly ^2: TCS/DSC indicator light turns on and off while DSC operates
POSSIBLE CAUSE	DSC HU/CM detected malfunction. (Input and output device malfunction) There is a difference in size or air pressure between front or rear tires. Poor installation with SAS control module (yaw rate sensor, low-G sensor) (If SAS control module is poorly installed, DSC may operate intermittently.) When replacing DSC HU/CM, initialization is not performed. (If initialization is not performed correctly, DSC may not work correctly.) Incorrect ABS wheel speed sensor is input to DSC HU/CM.

DSC^*2 operates frequently

DSC does not work correctly

^*2: TCS/DSC indicator light turns on and off while DSC operates

POSSIBLE CAUSE

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

There is a difference in size or air pressure between front or rear tires.

Poor installation with SAS control module (yaw rate sensor, low-G sensor) (If SAS control module is poorly installed, DSC may operate intermittently.)

When replacing DSC HU/CM, initialization is not performed. (If initialization is not performed correctly, DSC may not work correctly.)

Incorrect ABS wheel speed sensor is input to DSC HU/CM.

Diagnostic procedure


STEP	INSPECTION		ACTION
1	CONFIRM DSC HU/CM DTC Retrieve the DSC HU/CM DTC using the M-MDS (IDS). (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].)
1		No	Go to the next step.
2	VERIFY THAT SAS CONTROL MODULE IS INSTALLED Verify that each sensor is installed. Is SAS control module (yaw rate sensor, low-G sensor) securely installed?	Yes	Go to the next step.
2		No	Install the malfunctioning sensor securely.
3	VERIFY THAT BRAKE FLUID PRESSURE SENSOR IS INITIALIZED Verify that each sensor is initialized. Has the initialization for the DSC HU/CM been performed after replacing the DSC HU/CM and the SAS control module?	Yes	Go to the next step.
3		No	Perform the initialization procedure. (See DSC RELATED PARTS SENSOR INITIALIZATION PROCEDURE.)
4	INSPECT TIRE SIZE AND AIR PRESSURE Inspect tire size and air pressure. Tire size and air pressure as specified?	Yes	Go to the next step.
4		No	Replace with specified tires and adjust tire air pressure.
5^*	INSPECT ABS WHEEL-SPEED SENSOR OUTPUT PULSE Perform the Voltage Pattern Inspection for each ABS wheel-speed sensor. (See FRONT ABS WHEEL-SPEED SENSOR INSPECTION.) (See REAR ABS WHEEL-SPEED SENSOR INSPECTION.) Is the output voltage pattern normal?	Yes	Found malfunctioning part according to the “INTERMITTENT CONCERN TROUBLESHOOTING”. (See PRECAUTION [DYNAMIC STABILITY CONTROL (DSC)].)
5^*		No	ABS wheel-speed sensor installation inspection: Inspect the ABS wheel-speed sensor for looseness and confirm it is securely installed. ABS sensor rotor installation inspection: Inspect the ABS sensor rotor for poor installation. Repair or replace any malfunctioning parts according to the inspection result.

When performing an asterisked (*) troubleshooting inspection, shake the wiring harness and connectors while doing the inspection to discover whether poor contact points are the cause of any intermittent malfunctions. If there is a problem, verify that connectors, terminals and wiring harnesses are connected correctly and undamaged.

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