ON-BOARD DIAGNOSTIC SYSTEM [DSC HU/CM]

id040262181300


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

amxzzn00001919

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, and DSC OFF indicator 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

Description

Fail-safe

Drive cycle

Self test type*2

Memory function
C0001:01
Illuminated
Illuminated
Illuminated
Not illuminated
Stability control solenoid valve
×
—
C, D
×
C0001:49
Illuminated
Illuminated
Illuminated
Not illuminated
Stability control solenoid valve
×
—
C, D
×
C0002:01
Illuminated
Illuminated
Illuminated
Not illuminated
Traction control solenoid valve
×
—
C, D
×
C0002:49
Illuminated
Illuminated
Illuminated
Not illuminated
Traction control solenoid valve
×
—
C, D
×
C0003:01
Illuminated
Illuminated
Illuminated
Not illuminated
Stability control solenoid valve
×
—
C, D
×
C0003:49
Illuminated
Illuminated
Illuminated
Not illuminated
Stability control solenoid valve
×
—
C, D
×
C0004:01
Illuminated
Illuminated
Illuminated
Not illuminated
Traction control solenoid valve
×
—
C, D
×
C0004:49
Illuminated
Illuminated
Illuminated
Not illuminated
Traction control solenoid valve
×
—
C, D
×
C0010:01
Illuminated
Illuminated
Illuminated
Not illuminated
LF inlet solenoid valve
×
—
C, D
×
C0010:49
Illuminated
Illuminated
Illuminated
Not illuminated
LF inlet solenoid valve
×
—
C, D
×
C0011:01
Illuminated
Illuminated
Illuminated
Not illuminated
LF outlet solenoid valve
×
—
C, D
×
C0011:49
Illuminated
Illuminated
Illuminated
Not illuminated
LF outlet solenoid valve
×
—
C, D
×
C0014:01
Illuminated
Illuminated
Illuminated
Not illuminated
RF inlet solenoid valve
×
—
C, D
×
C0014:49
Illuminated
Illuminated
Illuminated
Not illuminated
RF inlet solenoid valve
×
—
C, D
×
C0015:01
Illuminated
Illuminated
Illuminated
Not illuminated
RF outlet solenoid valve
×
—
C, D
×
C0015:49
Illuminated
Illuminated
Illuminated
Not illuminated
RF outlet solenoid valve
×
—
C, D
×
C0018:01
Illuminated
Illuminated
Illuminated
Not illuminated
LR inlet solenoid valve
×
—
C, D
×
C0018:49
Illuminated
Illuminated
Illuminated
Not illuminated
LR inlet solenoid valve
×
—
C, D
×
C0019:01
Illuminated
Illuminated
Illuminated
Not illuminated
LR outlet solenoid valve
×
—
C, D
×
C0019:49
Illuminated
Illuminated
Illuminated
Not illuminated
LR outlet solenoid valve
×
—
C, D
×
C001C:01
Illuminated
Illuminated
Illuminated
Not illuminated
RR inlet solenoid valve
×
—
C, D
×
C001C:49
Illuminated
Illuminated
Illuminated
Not illuminated
RR inlet solenoid valve
×
—
C, D
×
C001D:01
Illuminated
Illuminated
Illuminated
Not illuminated
RR outlet solenoid valve
×
—
C, D
×
C001D:49
Illuminated
Illuminated
Illuminated
Not illuminated
RR outlet solenoid valve
×
—
C, D
×
C0020:01
Illuminated
Illuminated
Illuminated
Not illuminated
Pump motor
×
—
C, D
×
C0020:13
Illuminated
Illuminated
Illuminated
Not illuminated
Pump motor
×
—
C, D
×
C0020:16
Illuminated
Illuminated
Illuminated
Not illuminated
Pump motor
×
—
C
×
C0020:49
Illuminated
Illuminated
Illuminated
Not illuminated
Pump motor
×
—
C
×
C0020:71
Illuminated
Illuminated
Illuminated
Not illuminated
Pump motor
×
—
C, D
×
C0020:98
Illuminated
Illuminated
Illuminated
Not illuminated
Pump motor
×
—
C
×
C0023:62*3
Not illuminated
Not illuminated
Illuminated
Not illuminated
Brake switch
×
—
C
×
C0031:01
Not illuminated
Illuminated
Illuminated
Not illuminated
ABS wheel-speed sensor (LF)
×
—
C
×
C0031:11
Not illuminated
Illuminated
Illuminated
Not illuminated
ABS wheel-speed sensor (LF)
×
—
C
×
C0031:12
Not illuminated
Illuminated
Illuminated
Not illuminated
ABS wheel-speed sensor (LF)
×
—
C
×
C0031:14
Not illuminated
Illuminated
Illuminated
Not illuminated
ABS wheel-speed sensor (LF)
×
—
C
×
C0031:28
Not illuminated
Illuminated
Illuminated
Not illuminated
ABS wheel-speed sensor (LF)
×
—
C
×
C0031:64
Not illuminated
Illuminated
Illuminated
Not illuminated
ABS wheel-speed sensor (LF)
×
—
C
×
C0034:01
Not illuminated
Illuminated
Illuminated
Not illuminated
ABS wheel-speed sensor (RF)
×
—
C
×
C0034:11
Not illuminated
Illuminated
Illuminated
Not illuminated
ABS wheel-speed sensor (RF)
×
—
C
×
C0034:12
Not illuminated
Illuminated
Illuminated
Not illuminated
ABS wheel-speed sensor (RF)
×
—
C
×
C0034:14
Not illuminated
Illuminated
Illuminated
Not illuminated
ABS wheel-speed sensor (RF)
×
—
C
×
C0034:28
Not illuminated
Illuminated
Illuminated
Not illuminated
ABS wheel-speed sensor (RF)
×
—
C
×
C0034:64
Not illuminated
Illuminated
Illuminated
Not illuminated
ABS wheel-speed sensor (RF)
×
—
C
×
C0037:01
Not illuminated
Illuminated
Illuminated
Not illuminated
ABS wheel-speed sensor (LR)
×
—
C
×
C0037:11
Not illuminated
Illuminated
Illuminated
Not illuminated
ABS wheel-speed sensor (LR)
×
—
C
×
C0037:12
Not illuminated
Illuminated
Illuminated
Not illuminated
ABS wheel-speed sensor (LR)
×
—
C
×
C0037:14
Not illuminated
Illuminated
Illuminated
Not illuminated
ABS wheel-speed sensor (LR)
×
—
C
×
C0037:28
Not illuminated
Illuminated
Illuminated
Not illuminated
ABS wheel-speed sensor (LR)
×
—
C
×
C0037:64
Not illuminated
Illuminated
Illuminated
Not illuminated
ABS wheel-speed sensor (LR)
×
—
C
×
C003A:01
Not illuminated
Illuminated
Illuminated
Not illuminated
ABS wheel-speed sensor (RR)
×
—
C
×
C003A:11
Not illuminated
Illuminated
Illuminated
Not illuminated
ABS wheel-speed sensor (RR)
×
—
C
×
C003A:12
Not illuminated
Illuminated
Illuminated
Not illuminated
ABS wheel-speed sensor (RR)
×
—
C
×
C003A:14
Not illuminated
Illuminated
Illuminated
Not illuminated
ABS wheel-speed sensor (RR)
×
—
C
×
C003A:28
Not illuminated
Illuminated
Illuminated
Not illuminated
ABS wheel-speed sensor (RR)
×
—
C
×
C003A:64
Not illuminated
Illuminated
Illuminated
Not illuminated
ABS wheel-speed sensor (RR)
×
—
C
×
C0040:64
Not illuminated
Not illuminated
Illuminated
Not illuminated
Brake switch
×
—
C
×
C0044:01
Not illuminated
Illuminated
Illuminated
Not illuminated
Brake fluid pressure sensor
×
—
C
×
C0044:28
Not illuminated
Illuminated
Illuminated
Not illuminated
Brake fluid pressure sensor
×
—
C
×
C0044:49
Not illuminated
Illuminated
Illuminated
Not illuminated
Brake fluid pressure sensor
×
—
C
×
C0044:54
Not illuminated
Illuminated
Illuminated
Not illuminated
Brake fluid pressure sensor
×
—
C
×
C0051:28
Not illuminated
Not illuminated
Illuminated
Not illuminated
Steering angle signal
×
—
C
×
C0051:54
Not illuminated
Not illuminated
Illuminated
Not illuminated
Steering angle signal
×
—
C
×
C0051:64
Not illuminated
Not illuminated
Illuminated
Not illuminated
Steering angle signal
×
—
C
×
C0061:28
Not illuminated
Not illuminated
Illuminated
Not illuminated
Lateral-G signal
×
—
C
×
C0061:54
Not illuminated
Not illuminated
Illuminated
Not illuminated
Lateral-G signal
×
—
C
×
C0061:64
Not illuminated
Not illuminated
Illuminated
Not illuminated
Lateral-G signal
×
—
C
×
C0062:28
Not illuminated
Illuminated
Illuminated
Not illuminated
Longitudinal-G signal
×
—
C
×
C0062:54
Not illuminated
Illuminated
Illuminated
Not illuminated
Longitudinal-G signal
×
—
C
×
C0062:64
Not illuminated
Illuminated
Illuminated
Not illuminated
Longitudinal-G signal
×
—
C
×
C0063:28
Not illuminated
Not illuminated
Illuminated
Not illuminated
Yaw rate signal
×
—
C
×
C0063:54
Not illuminated
Not illuminated
Illuminated
Not illuminated
Yaw rate signal
×
—
C
×
C0063:64
Not illuminated
Not illuminated
Illuminated
Not illuminated
Yaw rate signal
×
—
C
×
C006B:68
Not illuminated
Illuminated
Illuminated
Not illuminated
DSC control
×
—
C
×
C0082:68
Illuminated
Illuminated
Illuminated
Not illuminated
ABS control
×
—
C
×
C101F:98
Illuminated
Illuminated
Illuminated
Not illuminated
Overheat protection control
×
—
C
×
C1109:64
Not illuminated
Not illuminated
Not illuminated
Not illuminated
DSC OFF switch
×
—
C
×
C1A77:11
Not illuminated
Illuminated
Illuminated
Not illuminated
Valve relay
×
—
C
×
C1A77:12
Not illuminated
Illuminated
Illuminated
Not illuminated
Valve relay
×
—
C
×
C1A77:49
Not illuminated
Illuminated
Illuminated
Not illuminated
Valve relay
×
—
C
×
C1A90:12
Illuminated
Illuminated
Illuminated
Not illuminated
ABS wheel-speed sensor power supply
×
—
C
×
C1A90:16
Illuminated
Illuminated
Illuminated
Not illuminated
ABS wheel-speed sensor power supply
×
—
C
×
C1A95:64
Illuminated
Illuminated
Illuminated
Not illuminated
ABS wheel-speed sensor
×
—
C
×
U0001:88
Not illuminated
Illuminated
Illuminated
Not illuminated
CAN communication: module communication error
×
—
C
×
U0100:00
Not illuminated
Not illuminated
Illuminated
Not illuminated
CAN communication: communication error to PCM
×
—
C
×
U0101:00
Not illuminated
Not illuminated
Illuminated
Not illuminated
CAN communication: communication error to TCM
×
—
C
×
U012B:00
Not illuminated
Not illuminated
Not illuminated
Not illuminated
CAN communication: communication error to EVP control unit
×
—
C
×
U0131:00
Not illuminated
Not illuminated
Illuminated
Not illuminated
CAN communication: communication error to EPS control module
×
—
C
×
U0140:00*3
Not illuminated
Not illuminated
Illuminated
Not illuminated
CAN communication: communication error to body control module (BCM)
×
—
C
×
U0151:00
Not illuminated
Illuminated
Illuminated
Not illuminated
CAN communication: communication error to SAS control module
×
—
C
×
U0155:00
Not illuminated
Illuminated
Illuminated
Not illuminated
CAN communication: communication error to instrument cluster
×
—
C
×
U023A:00*3
Not illuminated
Not illuminated
Not illuminated
Not illuminated
CAN communication: communication error to forward sensing camera (FSC)
×
—
C
×
U0401:00
Not illuminated
Not illuminated
Illuminated
Not illuminated
Signal error from PCM
×
—
C
×
U0402:00
Not illuminated
Not illuminated
Illuminated
Not illuminated
Signal error from TCM
×
—
C
×
U0420:00
Not illuminated
Not illuminated
Illuminated
Not illuminated
Signal error from EPS control module
×
—
C
×
U0420:82
Not illuminated
Not illuminated
Illuminated
Not illuminated
Signal error from EPS control module
×
—
C
×
U0420:83
Not illuminated
Not illuminated
Illuminated
Not illuminated
Signal error from EPS control module
×
—
C
×
U0422:00*3
Not illuminated
Not illuminated
Illuminated
Not illuminated
Signal error from body control module (BCM)
×
—
C
×
U0423:82
Not illuminated
Not illuminated
Illuminated
Not illuminated
Signal error from instrument cluster
×
—
C
×
U042C:00
Not illuminated
Not illuminated
Illuminated
Not illuminated
Signal error from EVP control unit
×
—
C
×
U042C:82
Not illuminated
Not illuminated
Not illuminated
Not illuminated
Signal error from EVP control unit
×
—
C
×
U042C:83
Not illuminated
Not illuminated
Not illuminated
Not illuminated
Signal error from EVP control unit
×
—
C
×
U0452:00
Not illuminated
Illuminated
Illuminated
Not illuminated
Signal error from SAS control module
×
—
C
×
U0452:82
Not illuminated
Not illuminated
Illuminated
Not illuminated
Signal error from SAS control module
×
—
C
×
U0452:83*3
Not illuminated
Not illuminated
Illuminated
Not illuminated
Signal error from SAS control module
×
—
C
×
U053B:00*3
Not illuminated
Not illuminated
Not illuminated
Not illuminated
Signal error from forward sensing camera (FSC)
×
—
C
×
U2300:54
Not illuminated
Illuminated
Illuminated
Not illuminated
Configuration
×
—
C
×
U2300:55
Not illuminated
Illuminated
Illuminated
Not illuminated
Configuration
×
—
C
×
U2300:56
Not illuminated
Illuminated
Illuminated
Not illuminated
Configuration
×
—
C
×
U2300:64
Not illuminated
Illuminated
Illuminated
Not illuminated
Configuration
×
—
C
×
U3000:42
Illuminated
Illuminated
Illuminated
Not illuminated
DSC HU/CM
×
—
C
×
U3000:44
Not illuminated
Illuminated
Illuminated
Not illuminated
DSC HU/CM
×
—
C
×
U3000:46
Not illuminated
Illuminated
Illuminated
Not illuminated
DSC HU/CM
×
—
C
×
U3000:47
Illuminated
Illuminated
Illuminated
Not illuminated
DSC HU/CM
×
—
C
×
U3000:49
Illuminated
Illuminated
Illuminated
Not illuminated
DSC HU/CM
×
—
C
×
U3000:4A
Illuminated
Illuminated
Illuminated
Not illuminated
DSC HU/CM
×
—
C
×
U3003:16
Illuminated
Illuminated
Illuminated
Not illuminated
Power supply
×
—
C
×
U3003:17
Illuminated
Illuminated
Illuminated
Not illuminated
Power supply
×
—
C
×
U3003:1E
Illuminated
Illuminated
Illuminated
Not illuminated
Power supply
×
—
C, D
×

*1  :When the parking brake is released
*2  :C: CMDTC self test, D: ODDTC self test
*3  :Vehicles with Smart City Brake Support (SCBS)


Status byte for DTC

•  The status byte is the two-digit code (two digits after hyphen (-)) after the seven-digit DTC.
am2zzn00002656
•  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.


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 table

A: Permits control
B: Permits back-up control
C: Permits EBD control without pressure reduction
D: Control is inhibited after it is completed and when control is not performed
E: Control is inhibited after it is completed, while the control amount is gradually reduced, and when control is not performed
F: Inhibits control

DTC

EBD control

ABS control

TCS control

DSC control

Brake assist control

Hill Launch Assist (HLA) control

Vehicle roll prevention function

Smart city brake support (SCBS)

Secondary Collision Reduction control

Vacuum support function

Engine control

Brake control

Engine control

Brake control
C0001:01
F
F
F
F
F
F
F
F
F
F
F
F
C0001:49
F
F
F
F
F
F
F
F
F
F
F
F
C0002:01
F
F
F
F
F
F
F
F
F
F
F
F
C0002:49
F
F
F
F
F
F
F
F
F
F
F
F
C0003:01
F
F
F
F
F
F
F
F
F
F
F
F
C0003:49
F
F
F
F
F
F
F
F
F
F
F
F
C0004:01
F
F
F
F
F
F
F
F
F
F
F
F
C0004:49
F
F
F
F
F
F
F
F
F
F
F
F
C0010:01
F
F
F
F
F
F
F
F
F
F
F
F
C0010:49
F
F
F
F
F
F
F
F
F
F
F
F
C0011:01
F
F
F
F
F
F
F
F
F
F
F
F
C0011:49
F
F
F
F
F
F
F
F
F
F
F
F
C0014:01
F
F
F
F
F
F
F
F
F
F
F
F
C0014:49
F
F
F
F
F
F
F
F
F
F
F
F
C0015:01
F
F
F
F
F
F
F
F
F
F
F
F
C0015:49
F
F
F
F
F
F
F
F
F
F
F
F
C0018:01
F
F
F
F
F
F
F
F
F
F
F
F
C0018:49
F
F
F
F
F
F
F
F
F
F
F
F
C0019:01
F
F
F
F
F
F
F
F
F
F
F
F
C0019:49
F
F
F
F
F
F
F
F
F
F
F
F
C001C:01
F
F
F
F
F
F
F
F
F
F
F
F
C001C:49
F
F
F
F
F
F
F
F
F
F
F
F
C001D:01
F
F
F
F
F
F
F
F
F
F
F
F
C001D:49
F
F
F
F
F
F
F
F
F
F
F
F
C0020:01
C
F
F
F
F
F
F
F
F
F
F
F
C0020:13
C
F
F
F
F
F
F
F
F
F
F
F
C0020:16
C
F
F
F
F
F
F
F
F
F
F
F
C0020:49
C
F
F
F
F
F
F
F
F
F
F
F
C0020:71
C
F
F
F
F
F
F
F
F
F
F
F
C0020:98
F
F
F
F
F
F
F
F
F
F
F
F
C0023:62
A
A
A
A
A
A
A
A
A
F
F
A
C0031:01
A
D
F
F
F
F
F
E
E
F
F
F
C0031:11
A
D
F
F
F
F
F
E
E
F
F
F
C0031:12
A
D
F
F
F
F
F
E
E
F
F
F
C0031:14
A
D
F
F
F
F
F
E
E
F
F
F
C0031:28
A
D
F
F
F
F
F
E
E
F
F
F
C0031:64
A
D
F
F
F
F
F
E
E
F
F
F
C0034:01
A
D
F
F
F
F
F
E
E
F
F
F
C0034:11
A
D
F
F
F
F
F
E
E
F
F
F
C0034:12
A
D
F
F
F
F
F
E
E
F
F
F
C0034:14
A
D
F
F
F
F
F
E
E
F
F
F
C0034:28
A
D
F
F
F
F
F
E
E
F
F
F
C0034:64
A
D
F
F
F
F
F
E
E
F
F
F
C0037:01
A
D
F
F
F
F
F
E
E
F
F
F
C0037:11
A
D
F
F
F
F
F
E
E
F
F
F
C0037:12
A
D
F
F
F
F
F
E
E
F
F
F
C0037:14
A
D
F
F
F
F
F
E
E
F
F
F
C0037:28
A
D
F
F
F
F
F
E
E
F
F
F
C0037:64
A
D
F
F
F
F
F
E
E
F
F
F
C003A:01
A
D
F
F
F
F
F
E
E
F
F
F
C003A:11
A
D
F
F
F
F
F
E
E
F
F
F
C003A:12
A
D
F
F
F
F
F
E
E
F
F
F
C003A:14
A
D
F
F
F
F
F
E
E
F
F
F
C003A:28
A
D
F
F
F
F
F
E
E
F
F
F
C003A:64
A
D
F
F
F
F
F
E
E
F
F
F
C0040:64
A
A
A
A
A
A
F
E
E
F
A
A
C0044:01
A
F
F
F
F
F
F
E
E
F
F
F
C0044:28
A
F
F
F
F
F
F
E
E
F
F
F
C0044:49
A
F
F
F
F
F
F
E
E
F
F
F
C0044:54
A
F
F
F
F
F
F
E
E
F
F
F
C0051:28
A
B
E
E
F
F
A
B
B
F
A
A
C0051:54
A
B
E
E
F
F
A
B
B
F
A
A
C0051:64
A
B
E
E
F
F
A
B
B
F
A
A
C0061:28
A
B
E
E
F
F
A
A
A
F
A
A
C0061:54
A
B
E
E
F
F
A
A
A
F
A
A
C0061:64
A
B
E
E
F
F
A
A
A
F
A
A
C0062:28
A
D
F
F
F
F
F
E
E
F
F
F
C0062:54
A
D
F
F
F
F
F
E
E
F
F
F
C0062:64
A
D
F
F
F
F
F
E
E
F
F
F
C0063:28
A
B
E
E
F
F
A
B
B
F
A
A
C0063:54
A
B
E
E
F
F
A
B
B
F
A
A
C0063:64
A
B
E
E
F
F
A
B
B
F
A
A
C006B:68
A
D
F
F
F
F
F
E
E
F
F
F
C0082:68
F
F
F
F
F
F
F
F
F
F
F
F
C101F:98
F
F
F
F
F
F
F
F
F
F
F
F
C1109:64
A
A
A
A
A
A
A
A
A
A
A
A
C1A77:11
F
F
F
F
F
F
F
F
F
F
F
F
C1A77:12
F
F
F
F
F
F
F
F
F
F
F
F
C1A77:49
F
F
F
F
F
F
F
F
F
F
F
F
C1A90:12
F
F
F
F
F
F
F
E
E
F
F
F
C1A90:16
F
F
F
F
F
F
F
E
E
F
F
F
C1A95:64
F
F
F
F
F
F
F
E
E
F
F
F
U0001:88
A
D
F
F
F
F
F
E
E
F
F
F
U0100:00
A
D
F
F
F
F
F
E
E
F
F
F
U0101:00
A
A
F
F
F
F
A
E
E
F
A
A
U012B:00
A
A
A
A
A
A
A
A
A
A
A
A
U0131:00
A
B
E
E
F
F
A
B
B
F
A
A
U0140:00
A
A
A
A
A
A
A
A
A
F
F
A
U0151:00
A
D
F
F
F
F
F
E
E
F
F
F
U0155:00
A
D
F
F
F
F
F
E
E
F
F
F
U023A:00
A
A
A
A
A
A
A
A
A
F
A
A
U0401:00
A
A
F
F
F
F
A
E
E
F
F
F
U0402:00
A
A
F
F
F
F
A
E
E
F
A
A
U0420:00
A
B
E
E
F
F
A
B
B
F
A
A
U0420:82
A
B
E
E
F
F
A
B
B
F
A
A
U0420:83
A
B
E
E
F
F
A
B
B
F
A
A
U0422:00
A
A
A
A
A
A
A
A
A
F
F
A
U0423:82
A
A
A
A
A
A
A
E
E
A
A
A
U042C:00
A
A
A
A
A
A
A
A
A
A
A
F
U042C:82
A
A
A
A
A
A
A
A
A
A
A
A
U042C:83
A
A
A
A
A
A
A
A
A
A
A
A
U0452:00
A
D
F
F
F
F
F
E
E
F
F
F
U0452:82
A
D
F
F
F
F
F
E
E
F
F
F
U0452:83
A
A
A
A
A
A
A
A
A
A
F
A
U053B:00
A
A
A
A
A
A
A
A
A
F
A
A
U2300:54
A
F
F
F
F
F
F
E
E
F
F
F
U2300:55
A
F
F
F
F
F
F
E
E
F
F
F
U2300:56
A
F
F
F
F
F
F
E
E
F
F
F
U2300:64
A
F
F
F
F
F
F
E
E
F
F
F
U3000:42
F
F
F
F
F
F
F
F
F
F
F
F
U3000:44
A
D
F
F
F
F
F
E
E
F
F
F
U3000:46
A
F
F
F
F
F
F
E
E
F
F
F
U3000:47
F
F
F
F
F
F
F
F
F
F
F
F
U3000:49
F
F
F
F
F
F
F
F
F
F
F
F
U3000:4A
F
F
F
F
F
F
F
F
F
F
F
F
U3003:16
F
F
F
F
F
F
F
F
F
F
F
F
U3003:17
C
F
F
F
F
F
F
F
F
F
F
F
U3003:1E
F
F
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
—
—
BRAKE_SW
Off/On
Brake switch
—
BRAKE_SW
BTCS
Inactive/Active
Brake traction control system
—
—
CFG_STATUS
Config Complete/
Not Configured/
Config Error
Configuration status
—
—
DSC_OFF_SW
Off/On
TCS OFF switch
—
DSC_OFF_SW
DSC_ST
Off/On
DSC status
—
DSC_ST
ECT_STATUS
Under 0 degrees C/
0 - Under 80 degrees C/
Over 80 degrees C/
FAIL
Engine coolant temperature status
—
—
EDC#1
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 Mazda Modular Diagnostic System (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 Mazda Modular Diagnostic System (M-MDS).
—
P_BRAKE_SW
Off/On
Parking brake switch
—
P_BRAKE_SW
PMP_MT
Off/On
Pump motor
—
PMP_MT
PMP_MT_SP
Off/On
Pump motor
—
PMP_MT_SP
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 Mazda Modular Diagnostic System (M-MDS).
—
R_GEAR_SW
Off/On
Reverse gear switch
—
R_GEAR_SW
RSC#1
Inactive/Active
Roll Stability Control
—
—
RPM_STATUS
Engine Stop/
Under 1500 rpm/
Over 1500 rpm/
FAIL
Engine RPM status
•  The DSC HU/CM constantly receives the engine speed sent via CAN signal from the instrument cluster.
•  If a DTC is detected, the DSC HU/CM records the engine speed when the DTC was detected, and it is displayed in the Mazda Modular Diagnostic System (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 Mazda Modular Diagnostic System (M-MDS).
—
TCS
Inactive/Active
Traction control system
—
—
TSC
Inactive/Active
Trailer Stability Control
—
—
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 snapshot 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 snapshot data item TOTAL_TIME.
3.  Subtract 2 from 1.
—
V_INLET_LF
Off/On
LF inlet solenoid valve
—
V_INLET_LF
V_INLET_LR
Off/On
LR inlet solenoid valve
—
V_INLET_LR
V_INLET_RF
Off/On
RF inlet solenoid valve
—
V_INLET_RF
V_INLET_RR
Off/On
RR inlet solenoid valve
—
V_INLET_RR
V_OUTLET_LF
Off/On
LF outlet solenoid valve
—
V_OUTLET_LF
V_OUTLET_LR
Off/On
LR outlet solenoid valve
—
V_OUTLET_LR
V_OUTLET_RF
Off/On
RF outlet solenoid valve
—
V_OUTLET_RF
V_OUTLET_RR
Off/On
RR outlet solenoid valve
—
V_OUTLET_RR
V_STB_LF/RR
Off/On
LF/RR stability control solenoid valve
—
V_STB_LF/RR
V_STB_RF/LR
Off/On
RF/LR stability control solenoid valve
—
V_STB_RF/LR
V_TRC_LF/RR
Off/On
LF/RR traction control solenoid valve
—
V_TRC_LF/RR
V_TRC_RF/LR
Off/On
RF/LR traction control solenoid valve
—
V_TRC_RF/LR
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 Mazda Modular Diagnostic System (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.
Note
•  If the PID “STR_ANG_R” is inspected, perform the following procedure before inspecting.
1.  Switch the ignition to OFF, and maintain this condition for approx. 3 s.
2.  Set the vehicle wheels in the straight-ahead position.
3.  Switch the ignition ON (engine off or on).

—: Not applicable

Monitor item

Unit/Operation

Test condition

Specification (Reference)
BRAKE_SW
Off/On
Brake pedal released
Off
Brake pedal depressed
On
BRK_F_P_C
Pa, psi
Changes according to the brake fluid pressure
BRK_F_P_R
Pa, psi
Changes according to the brake fluid pressure
DDS_MODE
Not_Learned/Learning/Learned
During initialization
Not_Learned
During learning
Learning
Learning completed (after ignition is switched off, switch it ON (engine off or on) and verify)
Learned
DSC_OFF_SW
Off/On
DSC OFF switch is released
Off
DSC OFF switch is depressed
On
DSC_ST
Off/On
During DSC OFF mode
Off
Other than DSC OFF mode
On
LAT_ACCL_C
G
Vehicle stopped or driving at constant speed
0 G
Cornering to left
Changes to 0 G—positive
Cornering to right
Changes to 0 G—negative
LAT_ACCL_R
G
Vehicle stopped or driving at constant speed
0 G
Cornering to left
Changes to 0 G—positive
Cornering to right
Changes to 0 G—negative
LON_ACCL_C
G
Vehicle stopped or driving at constant speed
0 G
Cornering to left
Changes to 0 G—positive
Cornering to right
Changes to 0 G—negative
LON_ACCL_R
G
Vehicle stopped or driving at constant speed
0 G
Cornering to left
Changes to 0 G—positive
Cornering to right
Changes to 0 G—negative
P_BRAKE_SW
Off/On
Parking brake lever released
Off
Parking brake lever pulled
On
PMP_MT
Off/On
Pump motor not activated
Off
Pump motor activated
On
PMP_MT_SP
Off/On
Pump motor not activated
Off
Pump motor activated
On
R_GEAR_SW
Off/On
Except shift/selector lever at R position
Off
Shift/selector lever at R position
On
STR_ANG_C
Note
•  Constantly indicates 0 ° until the steering wheel angle neutral position determination by the DSC HU/CM is completed.
•  The steering wheel angle neutral position determination by the DSC HU/CM is completed when the vehicle is driven in a straight line at a speed of 20 km/h {12 mph} or more for several seconds.
°
Steering wheel in neutral position
0 °
Steered left
Changes to 0 °—positive
Steered right
Changes to 0 °—negative
STR_ANG_R
Note
•  The signal indicated in this item is a steering angle (relative angle) in the EPS control module.
°
Steering wheel position when ignition is switched ON (engine off or on)
0 °
Steered left
Changes to 0 °—positive
Steered right
Changes to 0 °—negative
TPMS_TYPE
No_DDS/DDS/DDS+TOM_O/DDS+TOM_EU/DDS+TOM_US
Indicates Tire Pressure Monitoring System (TPMS) type
V_INLET_LF
Off/On
Solenoid valve not activated
Off
Solenoid valve activated
On
V_INLET_LR
Off/On
Solenoid valve not activated
Off
Solenoid valve activated
On
V_INLET_RF
Off/On
Solenoid valve not activated
Off
Solenoid valve activated
On
V_INLET_RR
Off/On
Solenoid valve not activated
Off
Solenoid valve activated
On
V_OUTLET_LF
Off/On
Solenoid valve not activated
Off
Solenoid valve activated
On
V_OUTLET_LR
Off/On
Solenoid valve not activated
Off
Solenoid valve activated
On
V_OUTLET_RF
Off/On
Solenoid valve not activated
Off
Solenoid valve activated
On
V_OUTLET_RR
Off/On
Solenoid valve not activated
Off
Solenoid valve activated
On
V_STB_LF/RR
Off/On
Solenoid valve not activated
Off
Solenoid valve activated
On
V_STB_RF/LR
Off/On
Solenoid valve not activated
Off
Solenoid valve activated
On
V_TRC_LF/RR
Off/On
Solenoid valve not activated
Off
Solenoid valve activated
On
V_TRC_RF/LR
Off/On
Solenoid valve not activated
Off
Solenoid valve activated
On
VPWR_B_SOL
V
Indicates power supply voltage for DSC HU/CM.
VSPD
KPH, MPH
Indicates vehicle speed.
WSPD_SEN_LF
KPH, MPH
Indicates vehicle speed.
WSPD_SEN_LR
KPH, MPH
Indicates vehicle speed.
WSPD_SEN_RF
KPH, MPH
Indicates vehicle speed.
WSPD_SEN_RR
KPH, MPH
Indicates vehicle speed.
YAW_RATE_C
°/s
Vehicle stopped or driving at constant speed
0 °/s
Cornering to left
Changes to 0 °/s—positive
Cornering to right
Changes to 0 °/s—negative
YAW_RATE_R
°/s
Vehicle stopped or driving at constant speed
0 °/s
Cornering to left
Changes to 0 °/s—positive
Cornering to right
Changes to 0 °/s—negative


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