Knowledge Base

Free to use workshop manual for your 2015+ Mk4 'ND' Mazda MX-5
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ON-BOARD DIAGNOSTIC SYSTEM [DSC HU/CM]

Outline

  • The on-board diagnostic system consists of the following functions:

    • A malfunction detection function that detects abnormalities in input/output signals when the ignition switch is at the ON position.

    • A PID/data monitor function that reads out specified input/output signals.

    • A simulation function that allows for override operation of output parts.

  • The data link connector 2 (DLC-2), which groups together all the connectors used for malfunction diagnosis 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) has following functions:

    • PID/data monitor access

    • DTC clear using the display screen of the diagnostic tester

Block diagram

Function

Malfunction detection function

  • The malfunction detection function detects malfunctions in the input/output signal system of the DSC HU/CM when the ignition switched ON or driving the vehicle.

  • The DSC HU/CM performs the following malfunction detections:

    • The brake system warning light, ABS warning light, TCS/DSC indicator light, DSC OFF indicator light, and Tire Pressure Monitoring System (TPMS) warning light illuminate for approx. 3.0 s when the ignition is switched ON. 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.

Malfunction display function

  • When the malfunction detection function detects a malfunction, the corresponding lights illuminate to alert the driver.

  • Using the external tester communication function, DTCs can be output to the DLC-2 via the CAN line. At the same time, malfunction detection results are sent to the memory function and fail-safe function.

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 switch 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 table
×: Applicable—: Not applicable

DTC

Brake system warning light*1

ABS warning light

TCS/DSC indicator light

DSC OFF indicator light

Tire Pressure Monitoring System (TPMS) warning light

Description

Fail-safe

Drive cycle

Self test type*2

Memory function

C0001:01

Illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

Stability control solenoid valve

×

—

C, D

×

C0001:49

Illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

Stability control solenoid valve

×

—

C, D

×

C0002:01

Illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

Traction control solenoid valve

×

—

C, D

×

C0002:49

Illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

Traction control solenoid valve

×

—

C, D

×

C0003:01

Illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

Stability control solenoid valve

×

—

C, D

×

C0003:49

Illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

Stability control solenoid valve

×

—

C, D

×

C0004:01

Illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

Traction control solenoid valve

×

—

C, D

×

C0004:49

Illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

Traction control solenoid valve

×

—

C, D

×

C0010:01

Illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

LF inlet solenoid valve

×

—

C, D

×

C0010:49

Illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

LF inlet solenoid valve

×

—

C, D

×

C0011:01

Illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

LF outlet solenoid valve

×

—

C, D

×

C0011:49

Illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

LF outlet solenoid valve

×

—

C, D

×

C0014:01

Illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

RF inlet solenoid valve

×

—

C, D

×

C0014:49

Illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

RF inlet solenoid valve

×

—

C, D

×

C0015:01

Illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

RF outlet solenoid valve

×

—

C, D

×

C0015:49

Illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

RF outlet solenoid valve

×

—

C, D

×

C0018:01

Illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

LR inlet solenoid valve

×

—

C, D

×

C0018:49

Illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

LR inlet solenoid valve

×

—

C, D

×

C0019:01

Illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

LR outlet solenoid valve

×

—

C, D

×

C0019:49

Illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

LR outlet solenoid valve

×

—

C, D

×

C001C:01

Illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

RR inlet solenoid valve

×

—

C, D

×

C001C:49

Illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

RR inlet solenoid valve

×

—

C, D

×

C001D:01

Illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

RR outlet solenoid valve

×

—

C, D

×

C001D:49

Illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

RR outlet solenoid valve

×

—

C, D

×

C0020:01

Illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

Pump motor

×

—

C, D

×

C0020:13

Illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

Pump motor

×

—

C, D

×

C0020:16

Illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

Pump motor

×

—

C

×

C0020:49

Illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

Pump motor

×

—

C

×

C0020:71

Illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

Pump motor

×

—

C, D

×

C0020:98

Illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

Pump motor

×

—

C

×

C0031:01

Not illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

ABS wheel-speed sensor (LF)

×

—

C

×

C0031:11

Not illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

ABS wheel-speed sensor (LF)

×

—

C

×

C0031:12

Not illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

ABS wheel-speed sensor (LF)

×

—

C

×

C0031:14

Not illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

ABS wheel-speed sensor (LF)

×

—

C

×

C0031:28

Not illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

ABS wheel-speed sensor (LF)

×

—

C

×

C0031:64

Not illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

ABS wheel-speed sensor (LF)

×

—

C

×

C0034:01

Not illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

ABS wheel-speed sensor (RF)

×

—

C

×

C0034:11

Not illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

ABS wheel-speed sensor (RF)

×

—

C

×

C0034:12

Not illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

ABS wheel-speed sensor (RF)

×

—

C

×

C0034:14

Not illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

ABS wheel-speed sensor (RF)

×

—

C

×

C0034:28

Not illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

ABS wheel-speed sensor (RF)

×

—

C

×

C0034:64

Not illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

ABS wheel-speed sensor (RF)

×

—

C

×

C0037:01

Not illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

ABS wheel-speed sensor (LR)

×

—

C

×

C0037:11

Not illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

ABS wheel-speed sensor (LR)

×

—

C

×

C0037:12

Not illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

ABS wheel-speed sensor (LR)

×

—

C

×

C0037:14

Not illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

ABS wheel-speed sensor (LR)

×

—

C

×

C0037:28

Not illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

ABS wheel-speed sensor (LR)

×

—

C

×

C0037:64

Not illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

ABS wheel-speed sensor (LR)

×

—

C

×

C003A:01

Not illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

ABS wheel-speed sensor (RR)

×

—

C

×

C003A:11

Not illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

ABS wheel-speed sensor (RR)

×

—

C

×

C003A:12

Not illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

ABS wheel-speed sensor (RR)

×

—

C

×

C003A:14

Not illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

ABS wheel-speed sensor (RR)

×

—

C

×

C003A:28

Not illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

ABS wheel-speed sensor (RR)

×

—

C

×

C003A:64

Not illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

ABS wheel-speed sensor (RR)

×

—

C

×

C0040:64

Not illuminated

Not illuminated

Illuminated

Not illuminated

Not illuminated

Brake switch

×

—

C

×

C0044:01

Not illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

Brake fluid pressure sensor

×

—

C

×

C0044:28

Not illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

Brake fluid pressure sensor

×

—

C

×

C0044:49

Not illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

Brake fluid pressure sensor

×

—

C

×

C0044:54

Not illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

Brake fluid pressure sensor

×

—

C

×

C0051:28

Not illuminated

Not illuminated

Illuminated

Not illuminated

Illuminated after flashes

Steering angle signal

×

—

C

×

C0051:54

Not illuminated

Not illuminated

Illuminated

Not illuminated

Illuminated after flashes

Steering angle signal

×

—

C

×

C0051:64

Not illuminated

Not illuminated

Illuminated

Not illuminated

Illuminated after flashes

Steering angle signal

×

—

C

×

C0061:28

Not illuminated

Not illuminated

Illuminated

Not illuminated

Illuminated after flashes

Lateral-G signal

×

—

C

×

C0061:54

Not illuminated

Not illuminated

Illuminated

Not illuminated

Illuminated after flashes

Lateral-G signal

×

—

C

×

C0061:64

Not illuminated

Not illuminated

Illuminated

Not illuminated

Illuminated after flashes

Lateral-G signal

×

—

C

×

C0062:28

Not illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

Longitudinal-G signal

×

—

C

×

C0062:54

Not illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

Longitudinal-G signal

×

—

C

×

C0062:64

Not illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

Longitudinal-G signal

×

—

C

×

C0063:28

Not illuminated

Not illuminated

Illuminated

Not illuminated

Illuminated after flashes

Yaw rate signal

×

—

C

×

C0063:54

Not illuminated

Not illuminated

Illuminated

Not illuminated

Illuminated after flashes

Yaw rate signal

×

—

C

×

C0063:64

Not illuminated

Not illuminated

Illuminated

Not illuminated

Illuminated after flashes

Yaw rate signal

×

—

C

×

C006B:68

Not illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

DSC control

×

—

C

×

C0082:68

Illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

ABS control

×

—

C

×

C101F:98

Illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

Overheat protection control

×

—

C

×

C1031:64

Not illuminated

Not illuminated

Not illuminated

Not illuminated

Illuminated after flashes

Tire Pressure Monitoring System (TPMS)

×

—

C

×

C1109:64

Not illuminated

Not illuminated

Not illuminated

Not illuminated

Not illuminated

DSC OFF switch

×

—

C

×

C1A77:11

Illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

Valve relay

×

—

C

×

C1A77:12

Illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

Valve relay

×

—

C

×

C1A77:49

Illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

Valve relay

×

—

C

×

C1A90:12

Illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

ABS wheel-speed sensor power supply

×

—

C

×

C1A90:16

Illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

ABS wheel-speed sensor power supply

×

—

C

×

C1A95:64

Illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

ABS wheel-speed sensor

×

—

C

×

U0001:88

Illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

CAN communication: module communication error

×

—

C

×

U0100:00

Not illuminated

Not illuminated

Illuminated

Not illuminated

Illuminated after flashes

CAN communication: communication error to PCM

×

—

C

×

U0101:00

Not illuminated

Not illuminated

Illuminated

Not illuminated

Illuminated after flashes

CAN communication: communication error to TCM

×

—

C

×

U012B:00

Not illuminated

Not illuminated

Not illuminated

Not illuminated

Not illuminated

CAN communication: communication error to EVP ECU

×

—

C

×

U0131:00

Not illuminated

Not illuminated

Illuminated

Not illuminated

Illuminated after flashes

CAN communication: communication error to EPS control module

×

—

C

×

U0151:00

Not illuminated

Not illuminated

Illuminated

Not illuminated

Not illuminated

CAN communication: communication error to SAS control module

×

—

C

×

U0155:00

Not illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

CAN communication: communication error to instrument cluster

×

—

C

×

U0401:00

Not illuminated

Not illuminated

Illuminated

Not illuminated

Illuminated after flashes

Signal error from PCM

×

—

C

×

U0402:00

Not illuminated

Not illuminated

Illuminated

Not illuminated

Illuminated after flashes

Signal error from TCM

×

—

C

×

U0420:00

Not illuminated

Not illuminated

Illuminated

Not illuminated

Illuminated after flashes

Signal error from EPS control module

×

—

C

×

U0420:82

Not illuminated

Not illuminated

Illuminated

Not illuminated

Illuminated after flashes

Signal error from EPS control module

×

—

—

×

U0420:83

Not illuminated

Not illuminated

Illuminated

Not illuminated

Illuminated after flashes

Signal error from EPS control module

×

—

C

×

U0423:82

Not illuminated

Not illuminated

Illuminated

Not illuminated

Not illuminated

Signal error from instrument cluster

×

—

C

×

U042C:00

Not illuminated

Not illuminated

Illuminated

Not illuminated

Not illuminated

Signal error from EVP ECU

×

—

C

×

U042C:82

Not illuminated

Not illuminated

Not illuminated

Not illuminated

Not illuminated

Signal error from EVP ECU

×

—

C

×

U042C:83

Not illuminated

Not illuminated

Not illuminated

Not illuminated

Not illuminated

Signal error from EVP ECU

×

—

C

×

U0452:00

Not illuminated

Not illuminated

Illuminated

Not illuminated

Illuminated after flashes

Signal error from SAS control module

×

—

C

×

U0452:82

Not illuminated

Not illuminated

Illuminated

Not illuminated

Illuminated after flashes

Signal error from SAS control module

×

—

C

×

U2300:54

Not illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

Configuration

×

—

C

×

U2300:55

Not illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

Configuration

×

—

C

×

U2300:56

Not illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

Configuration

×

—

C

×

U2300:64

Not illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

Configuration

×

—

C

×

U3000:42

Illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

DSC HU/CM

×

—

C

×

U3000:44

Not illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

DSC HU/CM

×

—

C

×

U3000:46

Not illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

DSC HU/CM

×

—

C

×

U3000:47

Illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

DSC HU/CM

×

—

C

×

U3000:49

Illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

DSC HU/CM

×

—

C

×

U3000:4A

Illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

DSC HU/CM

×

—

C

×

U3003:16

Illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

Power supply

×

—

C

×

U3003:17

Illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

Power supply

×

—

C

×

U3003:1E

Illuminated

Illuminated

Illuminated

Not illuminated

Illuminated after flashes

Power supply

×

—

C

×
*1
When the parking brake is released
*2
C: CMDTC self test, D: ODDTC self test
Status byte for DTC

  • The status byte is the two-digit code (two digits after hyphen (-)) after the seven-digit 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 M-MDS when reading the DTC.

Fail-safe function

  • When the malfunction detection function determines a malfunction, the corresponding lights illuminates to alert the driver. At this time, the fail-safe function controls as indicated in the fail-safe function 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.

Fail-safe function tableA: Permits controlB: Permits back-up controlC: Permits EBD control without pressure reductionD: Control is inhibited after it is completed and when control is not performedE: Control is inhibited after it is completed, while the control amount is gradually reduced, and when control is not performedF: Inhibits control

DTC

EBD control

ABS control

TCS control

DSC control

Brake assist control

Hill Launch Assist (HLA) control

Tire pressure monitoring system (TPMS) control

Vacuum support function

Engine control

Brake control

Engine control

Brake control

C0001:01

F

F

F

F

F

F

F

F

F

F

C0001:49

F

F

F

F

F

F

F

F

F

F

C0002:01

F

F

F

F

F

F

F

F

F

F

C0002:49

F

F

F

F

F

F

F

F

F

F

C0003:01

F

F

F

F

F

F

F

F

F

F

C0003:49

F

F

F

F

F

F

F

F

F

F

C0004:01

F

F

F

F

F

F

F

F

F

F

C0004:49

F

F

F

F

F

F

F

F

F

F

C0010:01

F

F

F

F

F

F

F

F

F

F

C0010:49

F

F

F

F

F

F

F

F

F

F

C0011:01

F

F

F

F

F

F

F

F

F

F

C0011:49

F

F

F

F

F

F

F

F

F

F

C0014:01

F

F

F

F

F

F

F

F

F

F

C0014:49

F

F

F

F

F

F

F

F

F

F

C0015:01

F

F

F

F

F

F

F

F

F

F

C0015:49

F

F

F

F

F

F

F

F

F

F

C0018:01

F

F

F

F

F

F

F

F

F

F

C0018:49

F

F

F

F

F

F

F

F

F

F

C0019:01

F

F

F

F

F

F

F

F

F

F

C0019:49

F

F

F

F

F

F

F

F

F

F

C001C:01

F

F

F

F

F

F

F

F

F

F

C001C:49

F

F

F

F

F

F

F

F

F

F

C001D:01

F

F

F

F

F

F

F

F

F

F

C001D:49

F

F

F

F

F

F

F

F

F

F

C0020:01

C

F

F

F

F

F

F

F

F

F

C0020:13

C

F

F

F

F

F

F

F

F

F

C0020:16

C

F

F

F

F

F

F

F

F

F

C0020:49

C

F

F

F

F

F

F

F

F

F

C0020:71

C

F

F

F

F

F

F

F

F

F

C0020:98

F

F

F

F

F

F

F

F

F

F

C0031:01

A

D

F

F

F

F

F

E

F

F

C0031:11

A

D

F

F

F

F

F

E

F

F

C0031:12

A

D

F

F

F

F

F

E

F

F

C0031:14

A

D

F

F

F

F

F

E

F

F

C0031:28

A

D

F

F

F

F

F

E

F

F

C0031:64

A

D

F

F

F

F

F

E

F

F

C0034:01

A

D

F

F

F

F

F

E

F

F

C0034:11

A

D

F

F

F

F

F

E

F

F

C0034:12

A

D

F

F

F

F

F

E

F

F

C0034:14

A

D

F

F

F

F

F

E

F

F

C0034:28

A

D

F

F

F

F

F

E

F

F

C0034:64

A

D

F

F

F

F

F

E

F

F

C0037:01

A

D

F

F

F

F

F

E

F

F

C0037:11

A

D

F

F

F

F

F

E

F

F

C0037:12

A

D

F

F

F

F

F

E

F

F

C0037:14

A

D

F

F

F

F

F

E

F

F

C0037:28

A

D

F

F

F

F

F

E

F

F

C0037:64

A

D

F

F

F

F

F

E

F

F

C003A:01

A

D

F

F

F

F

F

E

F

F

C003A:11

A

D

F

F

F

F

F

E

F

F

C003A:12

A

D

F

F

F

F

F

E

F

F

C003A:14

A

D

F

F

F

F

F

E

F

F

C003A:28

A

D

F

F

F

F

F

E

F

F

C003A:64

A

D

F

F

F

F

F

E

F

F

C0040:64

A

A

A

A

A

A

F

E

A

A

C0044:01

A

F

F

F

F

F

F

E

F

F

C0044:28

A

F

F

F

F

F

F

E

F

F

C0044:49

A

F

F

F

F

F

F

E

F

F

C0044:54

A

F

F

F

F

F

F

E

F

F

C0051:28

A

B

E

E

F

F

A

B

F

A

C0051:54

A

B

E

E

F

F

A

B

F

A

C0051:64

A

B

E

E

F

F

A

B

F

A

C0061:28

A

B

E

E

F

F

A

A

F

A

C0061:54

A

B

E

E

F

F

A

A

F

A

C0061:64

A

B

E

E

F

F

A

A

F

A

C0062:28

A

D

F

F

F

F

F

E

F

F

C0062:54

A

D

F

F

F

F

F

E

F

F

C0062:64

A

D

F

F

F

F

F

E

F

F

C0063:28

A

B

E

E

F

F

A

B

F

A

C0063:54

A

B

E

E

F

F

A

B

F

A

C0063:64

A

B

E

E

F

F

A

B

F

A

C006B:68

A

D

F

F

F

F

F

E

F

F

C0082:68

F

F

F

F

F

F

F

F

F

F

C101F:98

F

F

F

F

F

F

F

F

F

F

C1031:64

A

A

A

A

A

A

A

A

F

F

C1109:64

A

A

A

A

A

A

A

A

A

A

C1A77:11

F

F

F

F

F

F

F

F

F

F

C1A77:12

F

F

F

F

F

F

F

F

F

F

C1A77:49

F

F

F

F

F

F

F

F

F

F

C1A90:12

F

F

F

F

F

F

F

F

F

F

C1A90:16

F

F

F

F

F

F

F

F

F

F

C1A95:64

F

F

F

F

F

F

F

E

F

F

U0001:88

F

F

F

F

F

F

F

E

F

F

U0100:00

A

F

F

F

F

F

F

E

F

A

U0101:00

A

A

F

F

F

F

A

E

F

A

U012B:00

A

A

A

A

A

A

A

A

A

A

U0131:00

A

B

E

E

F

F

A

B

F

A

U0151:00

A

D

F

F

F

F

F

E

F

F

U0155:00

A

F

F

F

F

F

F

E

F

A

U0401:00

A

A

A

A

A

A

A

A

A

F

U0402:00

A

A

F

F

F

F

A

E

F

A

U0420:00

A

B

E

E

F

F

A

B

F

A

U0420:82

A

B

E

E

F

F

A

B

F

A

U0420:83

A

B

E

E

F

F

A

B

F

A

U0423:82

A

A

A

A

A

A

A

A

A

A

U042C:00

A

A

A

A

A

A

A

A

A

F

U042C:82

A

A

A

A

A

A

A

A

A

A

U042C:83

A

A

A

A

A

A

A

A

A

A

U0452:00

A

D

F

F

F

F

F

E

F

F

U0452:82

A

D

F

F

F

F

F

E

F

F

U2300:54

A

F

F

F

F

F

F

E

F

F

U2300:55

A

F

F

F

F

F

F

E

F

F

U2300:56

A

F

F

F

F

F

F

E

F

F

U2300:64

A

F

F

F

F

F

F

E

F

F

U3000:42

F

F

F

F

F

F

F

F

F

F

U3000:44

A

F

F

F

F

F

F

E

F

F

U3000:46

A

F

F

F

F

F

F

E

F

F

U3000:47

F

F

F

F

F

F

F

F

F

F

U3000:49

F

F

F

F

F

F

F

F

F

F

U3000:4A

F

F

F

F

F

F

F

F

F

F

U3003:16

F

F

F

F

F

F

F

F

F

F

U3003:17

C

F

F

F

F

F

F

F

F

F

U3003:1E

F

F

F

F

F

F

F

F

F

F
Snapshot data

  • The snapshot data stores the currently detected DTC data.

—: Not applicable

Snapshot data item

Unit

Definition

Data read/use method

Corresponding data monitor items

AAT

°C, °F

Ambient air temperature

—

—

ABS

Inactive/Active

Antilock braking system

—

—

APP_STATUS

Accelerator Pedal Off/

Under 20%/

Over 20%/

FAIL

Accelerator pedal position

—

—

AYC

Inactive/Active

Active yaw control

—

—

BTCS

Inactive/Active

Brake traction control system

—

—

CFG_STATUS

Config Complete/

Not Configured/

Config Error

Configuration status

—

—

ECT_STATUS

Under 0 degrees C/

0 - Under 80 degrees C/

Over 80 degrees C/

FAIL

Engine coolant temperature status

—

—

EDC

Inactive/Active

Engine drag control

—

—

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.

—

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.

—

PMP_MT

Off/On

Pump motor

—

PMP_MT

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 off

  • Key Recently Out (Position 0): Elapsed time within 3 s since ignition was switched 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.

—

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.

—

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.

—

TCS

Inactive/Active

Traction control system

—

—

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.

  1. Verify the odometer value in the instrument cluster.

  2. Verify the snap shot data item TOTAL_DIST.

  3. Subtract 2 from 1.

—

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.

  1. Verify the PID item TOTAL_TIME of the instrument cluster.

  2. Verify the snap shot data item TOTAL_TIME.

  3. Subtract 2 from 1.

—

VPWR

V

Power supply

—

VPWR_B_SOL

VSPD_STATUS

Stop/

0 - 10 km/h/

Over 10 km/h/

FAIL

Vehicle speed status

  • 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.

—
*1
Fractions of seconds may be indicated after the decimal point
PID/data monitor function

  • The PID/data monitor function is used for optionally selecting input/output signal monitor items preset in the DSC HU/CM and reading them out in real-time.

Monitor item

Unit/operation

Definition

BRAKE_SW

Off/On

Brake switch signal

BRK_F_P_C

Pa, psi

Brake fluid pressure sensor signal (calculated value)

BRK_F_P_R

Pa, psi

Brake fluid pressure sensor signal (raw value)

DDS_MODE

Not_Learned/Learning/Learned

Deflation detection system mode

DSC_OFF_SW

Off/On

DSC OFF switch signal

DSC_ST

Off/On

DSC status

LAT_ACCL_C

G

Lateral-G value (calculated value)

LAT_ACCL_R

G

Lateral-G value (raw value)

LON_ACCL_C

G

Longitudinal-G value (calculated value)

LON_ACCL_R

G

Longitudinal-G value (raw value)

P_BRAKE_SW

Off/On

Parking brake switch signal

PMP_MT

Off/On

Pump motor status

PMP_MT_SP

Off/On

Pump motor status

R_GEAR_SW

Off/On

Shift lever signal (R position)

STR_ANG_C

°

Steering wheel angle (calculated value)

STR_ANG_R

°

Steering wheel angle (raw value)

TPMS_TYPE

No_DDS/DDS/DDS+TOM_O/DDS+TOM_EU/DDS+TOM_US

Tire Pressure Monitoring System (TPMS) type

V_INLET_LF

Off/On

LF inlet solenoid valve status

V_INLET_LR

Off/On

LR inlet solenoid valve status

V_INLET_RF

Off/On

RF inlet solenoid valve status

V_INLET_RR

Off/On

RR inlet solenoid valve status

V_OUTLET_LF

Off/On

LF outlet solenoid valve status

V_OUTLET_LR

Off/On

LR outlet solenoid valve status

V_OUTLET_RF

Off/On

RF outlet solenoid valve status

V_OUTLET_RR

Off/On

RR outlet solenoid valve status

V_STB_LF/RR

Off/On

LF/RR stability control solenoid valve status

V_STB_RF/LR

Off/On

RF/LR stability control solenoid valve status

V_TRC_LF/RR

Off/On

LF/RR traction control solenoid valve status

V_TRC_RF/LR

Off/On

RF/LR traction control solenoid valve status

VPWR_B_SOL

V

Power supply

VSPD

KPH, MPH

Vehicle speed

WSPD_SEN_LF

KPH, MPH

LF ABS wheel-speed sensor signal

WSPD_SEN_LR

KPH, MPH

LR ABS wheel-speed sensor signal

WSPD_SEN_RF

KPH, MPH

RF ABS wheel-speed sensor signal

WSPD_SEN_RR

KPH, MPH

RR ABS wheel-speed sensor signal

YAW_RATE_C

°/s

Yaw rate value (calculated value)

YAW_RATE_R

°/s

Yaw rate value (raw value)
Simulation function

  • The simulation 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 simulation function.

Simulation item

Operation

Output part

Operating condition

PMP_MT_SP

Off/On

Pump motor

Switch the ignition ON (engine off)

V_INLET_LF

Off/On

LF inlet solenoid valve

Switch the ignition ON (engine off)

V_INLET_LR

Off/On

LR inlet solenoid valve

Switch the ignition ON (engine off)

V_INLET_RF

Off/On

RF inlet solenoid valve

Switch the ignition ON (engine off)

V_INLET_RR

Off/On

RR inlet solenoid valve

Switch the ignition ON (engine off)

V_OUTLET_LF

Off/On

LF outlet solenoid valve

Switch the ignition ON (engine off)

V_OUTLET_LR

Off/On

LR outlet solenoid valve

Switch the ignition ON (engine off)

V_OUTLET_RF

Off/On

RF outlet solenoid valve

Switch the ignition ON (engine off)

V_OUTLET_RR

Off/On

RR outlet solenoid valve

Switch the ignition ON (engine off)

V_STB_LF/RR

Off/On

LF/RR stability control solenoid valve

Switch the ignition ON (engine off)

V_STB_RF/LR

Off/On

RF/LR stability control solenoid valve

Switch the ignition ON (engine off)

V_TRC_LF/RR

Off/On

LF/RR traction control solenoid valve

Switch the ignition ON (engine off)

V_TRC_RF/LR

Off/On

RF/LR traction control solenoid valve

Switch the ignition ON (engine off)
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.

  • 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 via CAN lines.

  • The DSC HU/CM receives the command signals of the malfunction detection function, PID/data monitor function, and simulation function from the Mazda modular diagnostic system (M-MDS), and sends DTCs and data regarding the operating 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(s)

PID/data monitor function

Command signal to read selected monitor item

Monitored data for requested monitor item

Simulation function

Operation command signal for selected simulation item

Output part drive signal

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Free to use workshop manual for your 2015+ Mk4 'ND' Mazda MX-5

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