ON-BOARD DIAGNOSTIC SYSTEM [DYNAMIC STABILITY CONTROL (DSC)]

< Previous Next >

2014 - Mazda6 - Brakes

ON-BOARD DIAGNOSTIC SYSTEM [DYNAMIC STABILITY CONTROL (DSC)]

OUTLINE

The on-board diagnostic system consists of a malfunction detection system that detects malfunctions in input/output signals when the ignition is switched ON, a PID/data monitor function that reads out specified input/output signals, and an active command mode function that allows for override operation of output parts (such as solenoid valves).

The data link connector 2 (DLC-2), which groups together all the connectors used for malfunction diagnosis and detecting/repair into a single location, has been adopted, thereby improving serviceability. Diagnosis is performed by connecting the Mazda modular diagnostic system (M-MDS) to the DLC-2.

In addition to DTC read-out, the Mazda modular diagnostic system (M-MDS) is used to clear DTCs using the display screen of the diagnostic tester, and to access the PID/data monitor and active command modes functions, providing enhanced malfunction diagnosis and improved serviceability.

Block diagram

FUNCTION

Malfunction detection function

The malfunction detection function detects and displays malfunctions in the input/output signal system of the DSC HU/CM when the ignition is switched ON.

When the DSC HU/CM is activated, the following malfunction detection is performed.

The ABS warning light, brake system warning light, TCS/DSC indicator light, TSC OFF indicator light, tire pressure monitoring system warning light and master warning light illuminate for approx. 3.0 s when the ignition is switched ON to inspect for open circuits in the lights. At the same time, the input/output signals of each part are monitored for malfunction diagnosis. After starting to drive, the first time the vehicle speed is approx. 10 km/h {6.2 mph} or more the pump motor is operated and malfunction diagnosis is performed again. The input/output signals of each part are then constantly monitored and malfunctions are diagnosed.

NOTE:

The sound of the pump motor operation can be heard.

If the above malfunctions are detected, the corresponding lights are illuminated to alert the driver. DTCs can be output through the CAN_H and CAN_L of the DLC-2 using the external tester communication function. At the same time, malfunction detection results are sent to the memory and fail-safe functions.

Memory function

The memory function stores DTCs of malfunctions in input/output signal systems. With this function, once a DTC is stored it is not cleared after the ignition has been switched off, even if the malfunctioning signal system has returned to normal.

Since the DSC HU/CM has a built-in non-volatile memory, DTCs are not cleared even if the battery is removed. Therefore, it is necessary to clear the memory after performing repairs. Refer to the Workshop Manual for the DTC clearing procedure.

DTC 7-digit code definition

When related systems or components have failed, the CM stores the DTC of the malfunctioning part in the CM memory, and allows for the retrieval of the stored data using the scanning tool when necessary. The DTCs are indicated using seven digits. Each digit indicates the following.

Fail-safe function

When the malfunction detection function determines a malfunction, the warning indicator light illuminates to alert the driver. At this time, the fail-safe function controls as indicated in the fail-safe function malfunction contents table.

WARNING:

If EBD control is prohibited, the rear wheels could lock-up before the front wheels. If this occurs, the vehicle could yaw and become unstable. Therefore, always inspect the system immediately if EBD control is prohibited.

×: Applicable


DTC No.	ABS warning light	Brake system warning light (when parking brake is released)	TCS/DSC indicator light	DSC OFF indicator light	Tire pressure monitoring system warning light	Master warning light*⁶	Malfunction location	Fail-safe	Drive cycle	Self test type^*1	Memory function
B11D4:08^*6	Not illuminated	Not illuminated	Not illuminated	Not illuminated	Not illuminated	Illuminated	Laser sensor	×	Not applicable	C, D	×
C0001:01	Illuminated	Illuminated	Illuminated	Not illuminated	Not illuminated	Illuminated	DSC HU/CM internal malfunction (solenoid valve system-)	×	Not applicable	C, D	×
C0003:01
C0010:01
C0011:01
C0014:01
C0015:01
C0018:01
C0019:01
C001C:01
C001D:01
C0020:01	Illuminated	Illuminated	Illuminated	Not illuminated	Not illuminated	Illuminated	Pump motor, motor relay	×	Not applicable	C, D	×
C0020:11
C0020:13
C0020:16
C0020:1C
C0020:71
C0023:62*⁷	Not illuminated	Not illuminated	Not illuminated	Not illuminated	Not illuminated	Illuminated	Brake light/Brake switch	×	Not applicable	C, D	×
C0031:01	Illuminated	Not illuminated^*2	Illuminated	Not illuminated	Flashes*⁸	Illuminated	LF ABS wheel-speed sensor	×	Not applicable	C, D	×
C0031:13	Illuminated	Not illuminated^*2	Illuminated	Not illuminated	Flashes*⁸	Illuminated	LF ABS wheel-speed sensor	×	Not applicable	C, D	×
C0031:23	Illuminated	Not illuminated^*2	Illuminated	Not illuminated	Flashes*⁸	Illuminated	LF ABS wheel-speed sensor/ABS sensor rotor	×	Not applicable	C, D	×
C0031:27	Illuminated	Not illuminated^*2	Illuminated	Not illuminated	Flashes*⁸	Illuminated	LF ABS wheel-speed sensor/ABS sensor rotor	×	Not applicable	C, D	×
C0034:01	Illuminated	Not illuminated^*2	Illuminated	Not illuminated	Flashes*⁸	Illuminated	RF ABS wheel-speed sensor	×	Not applicable	C, D	×
C0034:13	Illuminated	Not illuminated^*2	Illuminated	Not illuminated	Flashes*⁸	Illuminated	RF ABS wheel-speed sensor	×	Not applicable	C, D	×
C0034:23	Illuminated	Not illuminated^*2	Illuminated	Not illuminated	Flashes*⁸	Illuminated	RF ABS wheel-speed sensor/ABS sensor rotor	×	Not applicable	C, D	×
C0034:27	Illuminated	Not illuminated^*2	Illuminated	Not illuminated	Flashes*⁸	Illuminated	RF ABS wheel-speed sensor/ABS sensor rotor	×	Not applicable	C, D	×
C0037:01	Illuminated	Not illuminated^*2	Illuminated	Not illuminated	Flashes*⁸	Illuminated	LR ABS wheel-speed sensor	×	Not applicable	C, D	×
C0037:13	Illuminated	Not illuminated^*2	Illuminated	Not illuminated	Flashes*⁸	Illuminated	LR ABS wheel-speed sensor	×	Not applicable	C, D	×
C0037:23	Illuminated	Not illuminated^*2	Illuminated	Not illuminated	Flashes*⁸	Illuminated	LR ABS wheel-speed sensor/ABS sensor rotor	×	Not applicable	C, D	×
C0037:27	Illuminated	Not illuminated^*2	Illuminated	Not illuminated	Flashes*⁸	Illuminated
C0037:62	Illuminated	Illuminated	Illuminated	Not illuminated	Flashes*⁸	Illuminated
C003A:01	Illuminated	Not illuminated^*2	Illuminated	Not illuminated	Flashes*⁸	Illuminated	RR ABS wheel-speed sensor	×	Not applicable	C, D	×
C003A:13	Illuminated	Not illuminated^*2	Illuminated	Not illuminated	Flashes*⁸	Illuminated	RR ABS wheel-speed sensor	×	Not applicable	C, D	×
C003A:23	Illuminated	Not illuminated^*2	Illuminated	Not illuminated	Flashes*⁸	Illuminated	RR ABS wheel-speed sensor/ABS sensor rotor	×	Not applicable	C, D	×
C003A:27	Illuminated	Not illuminated^*2	Illuminated	Not illuminated	Flashes*⁸	Illuminated
C003A:62	Illuminated	Illuminated	Illuminated	Not illuminated	Flashes*⁸	Illuminated
C0040:64	Illuminated	Not illuminated	Illuminated	Not illuminated	Flashes*⁸	Illuminated	Brake light/Brake switch	×	Not applicable	C, D	×
C0040:86	Illuminated	Not illuminated	Illuminated	Not illuminated	Flashes*⁸	Illuminated	Brake light/Brake switch	×	Not applicable	C, D	×
C0044:14	Not illuminated	Not illuminated	Illuminated	Not illuminated	Flashes*⁸	Illuminated	Brake fluid pressure sensor	×	Not applicable	C, D	×
C0044:1C
C0044:65
C0044:66
C0044:67
C0051:67	Not illuminated	Not illuminated	Illuminated	Not illuminated	Not illuminated	Illuminated	Steering angle signal	×	Not applicable	C, D	×
C0061:27	Illuminated	Not illuminated	Illuminated	Not illuminated	Flashes*⁸	Illuminated	SAS control module system (lateral-G signal)	×	Not applicable	C, D	×
C0061:28
C0061:29
C0061:54	Illuminated	Not illuminated	Illuminated	Not illuminated	Flashes*⁸	Illuminated	DSC HU/CM system (unperformed initialization procedure)	×	Not applicable	C, D	×
C0061:62	Not illuminated	Not illuminated	Illuminated	Not illuminated	Flashes*⁸	Illuminated	SAS control module system (lateral-G signal)	×	Not applicable	C, D	×
C0062:27	Illuminated	Not illuminated	Illuminated	Not illuminated	Not illuminated	Illuminated	SAS control module system (longitudinal-G signal)
C0062:28
C0062:29
C0062:54	Illuminated	Not illuminated	Illuminated	Not illuminated	Not illuminated	Illuminated	DSC HU/CM system (unperformed initialization procedure)	×	Not applicable	C, D	×
C0062:62	Illuminated	Not illuminated	Illuminated	Not illuminated	Not illuminated	Illuminated	SAS control module system (longitudinal-G signal)	×	Not applicable	C, D	×
C0062:65	Illuminated	Not illuminated	Illuminated	Not illuminated	Not illuminated	Illuminated	SAS control module system (longitudinal-G signal)
C0063:27	Not illuminated	Not illuminated	Illuminated	Not illuminated	Flashes*⁸	Illuminated	SAS control module system (yaw rate signal)
C0063:28
C0063:29
C0063:54	Not illuminated	Not illuminated	Illuminated	Not illuminated	Flashes*⁸	Illuminated	DSC HU/CM system (unperformed initialization procedure)	×	Not applicable	C, D	×
C0063:61	Not illuminated	Not illuminated	Illuminated	Not illuminated	Flashes*⁸	Illuminated	SAS control module system (yaw rate signal)	×	Not applicable	C, D	×
C0063:62	Not illuminated	Not illuminated	Illuminated	Not illuminated	Flashes*⁸	Illuminated	SAS control module system (yaw rate signal)	×	Not applicable	C, D	×
C006A:61	Illuminated	Not illuminated	Illuminated	Not illuminated	Flashes³⁸	Illuminated	TCS/DSC control system (combined sensor)	×	Not applicable	C, D	×
C0089:64	Not illuminated	Not illuminated	Not illuminated	Not illuminated	Not illuminated	Not illuminated	DSC OFF switch	Not applicable	Not applicable	C, D	×
C1031:35	Not illuminated	Not illuminated	Not illuminated	Not illuminated	Flashes*⁸	Not illuminated	Tire Pressure Monitoring System (TPMS) set switch	×	Not applicable	C, D	×
C1031:54	Not illuminated	Not illuminated	Not illuminated	Not illuminated	Flashes*⁸	Not illuminated	Tire Pressure Monitoring System (TPMS) system	×	Not applicable	C, D	×
C1031:68	Not illuminated	Not illuminated	Not illuminated	Not illuminated	Flashes*⁸	Not illuminated	Tire Pressure Monitoring System (TPMS) system	×	Not applicable	C, D	×
C1A77:12	Illuminated	Illuminated	Illuminated	Not illuminated	Not illuminated	Illuminated	Solenoid valve relay	×	Not applicable	C, D	×
C1A77:13
C1A77:16
U0001:88	Illuminated	Not illuminated	Illuminated	Not illuminated	Flashes*⁸	Illuminated	CAN line	×	Not applicable	C, D	×
U0100:00	Illuminated*³		Illuminated*³		Flashes³⁸
U0101:00*⁴	Not illuminated		Illuminated		Not illuminated
U0104:00*⁵			Not illuminated
U0131:00			Illuminated
U0151:00	Illuminated	Not illuminated	Illuminated	Not illuminated	Flashes*⁸	Illuminated	SAS control module system (CAN2 line malfunction)	×	Not applicable	C, D	×
U0155:00	Not illuminated	Not illuminated	Illuminated*³	Not illuminated	Not illuminated	Illuminated*³	CAN line	×	Not applicable	C, D	×
U0214:00*⁵	Not illuminated	Not illuminated	Not illuminated	Not illuminated	Not illuminated	Not illuminated
U0235:00*⁶	Not illuminated	Not illuminated	Not illuminated	Not illuminated	Not illuminated	Illuminated
U0301:00*⁵	Not illuminated	Not illuminated	Illuminated*³	Not illuminated	Flashes³⁸	Illuminated*³	Abnormal message from PCM	×	Not applicable	C, D	×
U0305:00*⁵	Not illuminated	Not illuminated	Not illuminated	Not illuminated	Not illuminated	Illuminated	Abnormal message from Vehicle Control Module (V/C-Module)	×	Not applicable	C, D	×
U0320:00	Not illuminated	Not illuminated	Illuminated	Not illuminated	Not illuminated	Illuminated	Abnormal message from EPS CM	×	Not applicable	C, D	×
U0323:00*⁶	Not illuminated	Not illuminated	Illuminated	Not illuminated	Not illuminated	Illuminated	Abnormal message from instrument cluster	×	Not applicable	C, D	×
U0338:00*⁵	Not illuminated	Not illuminated	Not illuminated	Not illuminated	Not illuminated	Not illuminated	Abnormal message from start stop unit	×	Not applicable	C, D	×
U0401:00	Not illuminated	Not illuminated	Illuminated*³	Not illuminated	Not illuminated	Illuminated^*3	Abnormal message from PCM	×	Not applicable	C, D	×
U0402:00*⁴	Not illuminated	Not illuminated	Illuminated	Not illuminated	Not illuminated	Illuminated	Abnormal message from transaxle	×	Not applicable	C, D	×
U0405:00*⁵	Not illuminated	Not illuminated	Not illuminated	Not illuminated	Not illuminated	Illuminated	Abnormal message from Vehicle Control Module (V/C-Module)	×	Not applicable	C, D	×
U0420:00	Not illuminated	Not illuminated	Illuminated	Not illuminated	Not illuminated	Illuminated	Abnormal message from EPS CM	×	Not applicable	C, D	×
U0420:64
U0428:62
U0433:00*⁶	Not illuminated	Not illuminated	Not illuminated	Not illuminated	Not illuminated	Illuminated	Abnormal message from laser sensor	×	Not applicable	C, D	×
U0443:00*⁶	Not illuminated	Not illuminated	Illuminated	Not illuminated	Not illuminated	Illuminated	Abnormal message from instrument cluster	×	Not applicable	C, D	×
U0515:00*⁵	Not illuminated	Not illuminated	Not illuminated	Not illuminated	Not illuminated	Not illuminated	Abnormal message from start stop unit	×	Not applicable	C, D	×
U2300:52	Illuminated	Not illuminated	Illuminated	Not illuminated	Flashes*⁸	Illuminated	Configuration data not recorded/incompatible configuration data received	×	Not applicable	C, D	×
U2300:54
U2300:55
U2300:56
U2300:64
U3000:4A	Illuminated	Not illuminated	Illuminated	Not illuminated	Flashes*⁸	Illuminated	DSC unit mismatched installation	×	Not applicable	C, D	×
U3000:96	Illuminated	Illuminated	Illuminated	Not illuminated	Flashes*⁸	Illuminated	DSC HU/CM (internal malfunction)	×	Not applicable	C, D	×
U3003:16	Illuminated	Illuminated	Illuminated	Not illuminated	Flashes*⁸	Illuminated	Power supply system	×	Not applicable	C, D	×
U3003:17
U3003:1C

*¹: C: CMDTC self-test, D: ODDTC self-test.
*²: Illuminates when one or two rear wheels have a malfunction.
*³: Not illuminated depending on malfunction content.
*⁴: ATX only.
*⁵: Vehicles with Mazda Radar Cruise Control (MRCC) .
*⁶: Vehicles with Smart City Brake Support (SCBS).
*⁷: Vehicles with Smart City Brake Support (SCBS) and Mazda Radar Cruise Control (MRCC).
*⁸: Tire pressure monitoring system warning light illuminates after flashes.

Fail-safe Function Malfunction Contents


DTC No.	Fail-safe function
	Control status
	ABS control	EBD control	Brake assist Control	TCS Control*⁹	Hill Launch Assist (HLA)	Vehicle roll prevention function control*¹	DSC Control	Mazda Radar Cruise Control (MRCC)*¹	Smart City Brake Support (SCBS)*¹	Tire Pressure Monitoring System (TPMS)
B11D4:08	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control disabled	Control enabled
C0001:01	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control enabled
C0003:01
C0010:01
C0011:01
C0014:01
C0015:01
C0018:01
C0019:01
C001C:01
C001D:01
C0020:01	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control enabled
C0020:11
C0020:13
C0020:16
C0020:1C
C0020:71
C0023:62	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control disabled	Control disabled	Control enabled
C0031:01	Control disabled	Control enabled*²	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled
C0031:13
C0031:23
C0031:27
C0034:01
C0034:13
C0034:23
C0034:27
C0037:01
C0037:13
C0037:23
C0037:27
C0037:62		Control disabled
C003A:01		Control enabled*²
C003A:13
C003A:23
C003A:27
C003A:62		Control disabled
C0040:64	Control disabled	Control enabled*³	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled
C0040:86	Control disabled	Control enabled*³	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled
C0044:14	Control enabled*³	Control enabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled
C0044:1C
C0044:65
C0044:66
C0044:67
C0051:67	Control enabled*³	Control enabled	Control enabled	Control disabled	Control enabled	Control enabled	Control disabled	Control disabled	Control disabled	Control enabled
C0061:27	Control disabled	Control enabled*³	Control disabled	Control disabled	Control enabled	Control enabled	Control disabled	Control disabled	Control disabled	Control disabled
C0061:28
C0061:29
C0061:54	Control disabled	Control enabled*³	Control disabled	Control disabled	Control enabled	Control enabled	Control disabled	Control disabled	Control disabled	Control disabled
C0061:62	Control enabled*³	Control enabled	Control enabled	Control disabled	Control enabled	Control enabled	Control disabled	Control disabled	Control disabled	Control disabled
C0062:27	Control disabled	Control enabled*³	Control disabled	Control disabled	Control disabled	Control disabled				Control enabled
C0062:28
C0062:29
C0062:54	Control disabled	Control enabled*³	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control enabled
C0062:62	Control disabled	Control enabled*³	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control enabled
C0062:65	Control disabled	Control enabled*³	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control enabled
C0063:27	Control enabled*³	Control enabled	Control enabled	Control disabled	Control enabled	Control enabled	Control disabled	Control disabled	Control disabled	Control disabled
C0063:28
C0063:29
C0063:54	Control enabled*³	Control enabled	Control enabled	Control disabled	Control enabled	Control enabled	Control disabled	Control disabled	Control disabled	Control disabled
C0063:61	Control enabled*³	Control enabled	Control enabled	Control disabled	Control enabled	Control enabled	Control disable d	Control disabled	Control disabled	Control disabled
C0063:62	Control enabled*³	Control enabled	Control enabled	Control disabled	Control enabled	Control enabled	Control disable d	Control disabled	Control disabled	Control disabled
C006A:61	Control disabled	Control enabled*³	Control disabled	Control disabled	Control enabled*⁴	Control enabled*⁴	Control disabled	Control disabled	Control disabled	Control enabled*⁴
C0089:64	Control enabled
C1031:35	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control disabled
C1031:54	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control disabled
C1031:68	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control disabled
C1A77:12	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control enabled
C1A77:13
C1A77:16
U0001:88	Control disabled	Control enabled*³	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled
U0100:00	Control disabled*⁵	Control enabled*³	Control disabled*⁵	Control disabled*⁵	Control disabled*⁵	Control disabled*⁵	Control disabled*⁵	Control disabled*⁵	Control disabled*⁵	Control disabled*⁵
U0101:00^*6	Control enabled	Control enabled	Control enabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control enabled
U0104:00*⁷	Control enabled			Control enabled	Control enabled	Control enabled	Control enabled		Control enabled
U0131:00	Control enabled*³			Control disabled	Control enabled	Control enabled	Control disabled		Control disabled
U0151:00	Control disabled	Control enabled*³	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled
U0154:00	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled
U0155:00					Control disabled*⁵			Control disabled*⁵	Control disabled*⁵
U0214:00*⁷					Control enabled			Control disabled	Control enabled
U0235:00*⁸					Control enabled			Control enabled	Control disabled
U0301:00*⁷	Control enabled	Control enabled	Control enabled	Control disabled*⁵	Control disabled*⁵	Control disabled*⁵	Control disabled*⁵	Control disabled	Control disabled*⁵	Control disabled*⁵
U0305:00*⁷	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control disabled	Control enabled	Control enabled
U0320:00	Control enabled*³	Control enabled	Control enabled	Control disabled	Control enabled	Control enabled	Control disabled	Control disabled	Control disabled	Control enabled
U0323:00*⁸	Control enabled	Control enabled	Control enabled	Control enabled	Control disabled	Control enabled	Control enabled	Control enabled	Control disabled	Control enabled
U0336:00	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled
U0338:00*⁷	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control disabled	Control enabled	Control enabled
U0401:00	Control enabled	Control enabled	Control enabled	Control disabled*⁵	Control disabled*⁵	Control disabled*⁵	Control disabled*⁵	Control disabled*⁵	Control disabled*⁵	Control enabled
U0402:00^*6	Control enabled	Control enabled	Control enabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control enabled
U0405:00*⁷	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control disabled	Control enabled	Control enabled
U0420:00	Control enabled*³	Control enabled	Control enabled	Control disabled	Control enabled	Control enabled	Control disabled	Control disabled	Control disabled	Control enabled
U0420:64
U0428:62
U0433:00*⁸	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control disabled	Control enabled
U0443:00	Control enabled	Control enabled	Control enabled	Control enabled	Control disabled	Control enabled	Control enabled	Control enabled	Control disabled	Control enabled
U0515:00*⁷	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control enabled	Control disabled	Control enabled	Control enabled
U2300:52	Control disabled	Control enabled*³	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled
U2300:54	Control disabled	Control enabled*³	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled
U2300:55
U2300:56
U2300:64
U3000:4A	Control disabled	Control enabled*³	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled	Control disabled
U3000:96	Control disabled
U3003:16	Control disabled
U3003:17
U3003:1C

*¹: If equipped.
*²: Control which requires sensor data is inhibited. Moreover, control is disabled when one or two rear wheels have a malfunction.
*³: Control which requires sensor data is inhibited.
*⁴: Control disabled depending on malfunction content.
*⁵: Control enabled depending on malfunction content.
*⁶: ATX only.
*⁷: Vehicles with Mazda Radar Cruise Control (MRCC) .
*⁸: Vehicles with Smart City Brake Support (SCBS).
*⁹: TCS control includes brake control and engine control

Status byte for DTC

The status byte is the two-digit code (two digits after hyphen (-)) after the DTC.

The status byte is a code which indicates the pending code, current/past malfunction status, or warning illumination status.

The status byte can be read by performing a CMDTC self test using the Mazda Modular Diagnostic System (M-MDS).

For details on the status byte, refer to the explanation on the Mazda Modular Diagnostic System (M-MDS) when reading the DTC.

Snapshot data

NOTE:

The EPS CM stores the following two types of information when a DTC is detected and displays snap shot data in the M-MDS.

Vehicle information detected by EPS CM

Vehicle information detected by instrument cluster and received by start stop unit via CAN signal

The snapshot data stores the currently detected DTC data


Snapshot data item	Unit	Data contents	Data read/use method	Corresponding data monitor items
AAT	°C, °F	Ambient air temperature	Not applicable.	Not applicable.
ABS	Inactive/ Active	Antilock braking system	Not applicable.	Not applicable.
APP_STATUS	Accelerator Pedal Off/ Under 20%/ Over 20%/ FAIL	Accelerator pedal position	Not applicable.	Not applicable.
AYC	Inactive/ Active	Active yaw control	Not applicable.	Not applicable.
BRK_F_P_R	Pa, psi	Brake fluid line hydraulic pressure (Raw Value)	BRK_F_P_R	BRK_F_P_R
BTCS	Inactive/ Active	Brake traction control system	Not applicable.	Not applicable.
CFG_STATUS	Config Complete/ Not Configured/ Config Error	Instrument cluster configuration status	Not applicable.	Not applicable.
ECT_STATUS	Under 0 degrees C/ 0 - Under 80 degrees C/ Over 80 degrees C/ FAIL	Engine coolant temperature status	Not applicable.	Not applicable.
EDC	Inactive/ Active	Engine drag control	Not applicable.	Not applicable.
IC_VPWR	V	Instrument cluster power supply	The DSC HU/CM constantly receives the power supply voltage value of the instrument cluster sent via CAN signal from the instrument cluster. If a DTC is detected, the DSC HU/CM records the power supply voltage of the instrument cluster when the DTC was detected, and it is displayed in the M-MDS.	VRWR^*2
IG-ON_TIMER	hh:mm:ss*¹	Elapsed time since ignition was switched ON NOTE: The instrument cluster records the elapsed time since the ignition was switched ON.	The DSC HU/CM constantly receives the elapsed time since the ignition was switched ON sent via CAN signal from the instrument cluster. If a DTC is detected, the DSC HU/CM records the elapsed time since the ignition was switched ON when the DTC was detected, and it is displayed in the M-MDS.	Not applicable.
LAT_ACCL_R	G	Lateral acceleration (Raw Value)	LAT_ACCL_R	LAT_ACCL_R
LON_ACCL_R	G	Longitudinal acceleration (Raw Value)	LON_ACCL_R	LON_ACCL_R
PMP_MT	Off/On	Pump motor	Not applicable.	Not applicable.
PWR_MODE_KEY	Key Out/ Key Recently Out/ Key Approved (Position 0)/ Post Accessory (Position 0)/ Accessory (Position 1)/ Post Ignition (Position 1)/ Ignition On (Position 2)/ Running (Position 2)/ Running - Starting In Progress (Position 2)/ Crank (Position 3)	Key Out: Ignition switched to off Key Recently Out (Position 0): Elapsed time within 3 s since ignition was switched to off Accessory (Position 1): Ignition is switched to ACC Post Ignition (Position 2): Elapsed time within 3 s since ignition was switched ON Ignition On (Position 2): Ignition switched ON (engine off) Running (Position 2): Ignition switched ON (engine on) Running - Starting: Cranking condition	The DSC HU/CM constantly receives the ignition switch status sent via CAN signal from the instrument cluster. If a DTC is detected, the DSC HU/CM records the ignition switch status when the DTC was detected, and it is displayed in the M-MDS.	Not applicable.
RPM_STATUS	Engine Stop/ Under 1500 rpm/ Over 1500 rpm/ FAIL	Engine RPM status	The DSC HU/CM constantly receives the ignition switch status sent via CAN signal from the instrument cluster. If a DTC is detected, the DSC HU/CM records the ignition switch status when the DTC was detected, and it is displayed in the M-MDS.	TACHOMTR^*2
SHIFT_STATUS	P/N D/ R/ FAIL	Shift position status	The DSC HU/CM constantly receives the selector lever position sent via CAN signal from the instrument cluster. If a DTC is detected, the DSC HU/CM records the selector lever position when the DTC was detected, and it is displayed in the M-MDS.	Not applicable.
STR_ANG_C	°	Steering wheel angle (Calculated Value)	STR_ANG_C	STR_ANG_C
TCS	Inactive/ Active	Traction control system	Not applicable.	Not applicable.
TOTAL_DIST	km, ft, mi	Accumulated total traveled distance from completion of vehicle until DSC HU/CM detects DTC (Odometer value in instrument cluster)	The distance traveled when the DSC HU/CM detected a DTC can be calculated by performing the following procedure. Verify the odometer value in the instrument cluster. Verify the snap shot data item TOTAL_DIST. Subtract 2 from 1.	Not applicable.
TOTAL_TIME	hh:mm:ss*¹	Accumulated total elapsed time since vehicle completion until DSC HU/CM detects a DTC NOTE: When the ROOM fuse is removed, and the ignition is switched off, the time is not included in the elapsed time.	The elapsed time when the DSC HU/CM detected a DTC can be calculated by performing the following procedure. Verify the PID item TOTAL_TIME of the instrument cluster. Verify the snap shot data item TOTAL_TIME. Subtract 2 from 1.	Not applicable.
VPWR	V	Power supply	VPWR	VPWR
VSPD	KPH, MPH	Vehicle speed	VSPD	VSPD
VSPD_STATUS	Stop/ 0 - 10km/h/ Over 10km/h/ FAIL	When a DTC is detected, the DSC HU/CM receives the vehicle speed being detected by the instrument cluster via CAN signals and displays it in the M-MDS.	The DSC HU/CM constantly receives the vehicle speed sent via CAN signal from the instrument cluster. If a DTC is detected, the DSC HU/CM records the vehicle speed when the DTC was detected, and it is displayed in the M-MDS.	SPEEDOMTR^*2
YAW_RATE_R	°/S	Yaw Rate (Raw Value)	YAW_RATE_R	YAW_RATE_R

*¹: The seconds may be indicated after the decimal point.
*²: Instrument cluster PID.

Active command modes function

The active command modes function is used for optionally selecting simulation items of input/output parts preset in the DSC HU/CM, and to operate them regardless of CM control.

To protect the hydraulic unit interior, operate output related parts for only 2 s or less when using the active command modes function.

Active command mode table


Command name	Output part	Operation	Operating condition
PMP_MT_SP	Pump motor	Off/On	Switch the ignition ON
V_INLET_LF	LF inlet solenoid valve
V_INLET_LR	LR inlet solenoid valve
V_INLET_RF	RF inlet solenoid valve
V_INLET_RR	RR inlet solenoid valve
V_OUTLET_LF	LF outlet solenoid valve
V_OUTLET_LR	LR outlet solenoid valve
V_OUTLET_RF	RF outlet solenoid valve
V_OUTLET_RR	RR outlet solenoid valve
V_STB_LF/RR	LF/RR stability control solenoid valve	Off	Not applicable
V_STB_RF/LR	RF/LR stability control solenoid valve	Off	Not applicable
V_TRC_LF/RR	LF/RR linear control solenoid valve	Off/On	Switch the ignition ON
V_TRC_RF/LR	RF/LR linear control solenoid valve	Off/On	Switch the ignition ON

External tester communication function

The external tester communication function enables communication of diagnostic data (DTC read-outs, input/output signal read-outs, operation of input/output parts) between the DSC HU/CM and an external tester.

Connections/communication contents


	External tester
	Mazda Modular Diagnostic System (M-MDS)
	Connection	Communication method
On-board diagnostic (malfunction detection) function	Input/output: CAN_H (HS), CAN_L (HS) terminals	Serial communication
PID/data monitor function	Input/output: CAN_H (HS), CAN_L (HS) terminals	Serial communication
Active command modes function	Input/output: CAN_H (HS), CAN_L (HS) terminals	Serial communication

Serial communication

Serial communication (two-way communication) allows for multiple data to be sent and received instantly along the same line.

By connecting the Mazda Modular Diagnostic System (M-MDS) to the DLC-2, diagnostic data can be sent and received between the Mazda Modular Diagnostic System (M-MDS) and the DSC HU/CM using the CAN_H and CAN_L terminals (within the DLC-2).

The DSC HU/CM receives the command signals of the malfunction detection function, PID/data monitor function, and the active command modes function based on the Mazda Modular Diagnostic System (M-MDS), and sends DTCs and data regarding the operating condition and status of each input/output part to the Mazda Modular Diagnostic System (M-MDS).


Diagnostic function name	Signal received	Signal sent
Malfunction detection function	DTC verification signal	DTC
PID/data monitor function	Command signal to read selected monitor item	Monitored data for requested monitor item
Active command modes function	Operation command signal for selected active command modes item	Output part drive signal

< Previous Next >