ON-BOARD DIAGNOSTIC

id100200001500


Features

•  The CAN system-related modules have an on-board diagnostic function. The on-board diagnostic function consists of the following functions: A malfunction detection function, which detects malfunctions in the CAN system-related parts; a memory function, which stores detected DTCs; a display function, which indicates malfunctioning areas and status via DTC display.

On-board Diagnostic Function


Malfunction detection function

•  Detects errors in the input and output signals.
•  If a malfunction is detected, a DTC is output to the DLC-2 through the malfunction indication function. At the same time, malfunction detection results are sent to the memory function.


Memory function

•  The memory function stores malfunctions in input/output signal systems. With this function, malfunction data is not cleared after the ignition is switched off (LOCK), even if the malfunctioning signal system has returned to normal.
•  The stored malfunction information can be cleared by connecting the Mazda Modular Diagnostic System (M-MDS) to the DLC-2 following the Workshop Manual procedure for clearing codes.


Display Function

•  This function is for outputting present or past malfunctions via the DLC-2 as DTCs.
•  To read DTCs output to the DLC-2, use the Mazda Modular Diagnostic System (M-MDS).

DTC table (HS-CAN)

DTC output module (Mazda Modular Diagnostic System (M-MDS) display)

DTC

Malfunction location
PCM*1
(PCM)
U0073:00
Unit communication error
U0101:00
Communication error with TCM
U0104:00
Communication error with radar unit
U0121:00
Communication error with DSC HU/CM
U0131:00
Communication error with EPS control module
U0140:00
Communication error with front body control module (FBCM)
U0151:00
Communication error with SAS control module
U0155:00
Communication error with instrument cluster
U0214:00
Communication error with start stop unit
U0235:00
Communication error with laser sensor
U0298:00
Communication error with DC-DC converter (i-ELOOP)
PCM*2
(PCM)
U0073:00
Unit communication error
U0101:00
Communication error with TCM
U0104:00
Communication error with radar unit
U0121:00
Communication error with DSC HU/CM
U0131:00
Communication error with EPS control module
U0140:00
Communication error with front body control module (FBCM)
U0151:00
Communication error with SAS control module
U0155:00
Communication error with instrument cluster
U0214:00
Communication error with start stop unit
U0235:00
Communication error with laser sensor
DSC HU/CM
(ABS)
U0001:88
Unit communication error
U0100:00
Communication error with PCM
U0101:00
Communication error with TCM
U0104:00
Communication error with radar unit
U0114:00
Communication error with 4WD control module
U0131:00
Communication error with EPS control module
U0151:00
Communication error with SAS control module
U0155:00
Communication error with instrument cluster
U0235:00
Communication error with laser sensor
Radar unit*3
(SBS/MRCC)
U0001:88
Unit communication error
U0100:00
Communication error with PCM
U0101:00
Communication error with TCM
U0121:00
Communication error with DSC HU/CM
U0131:00
Communication error with EPS control module
U0140:00
Communication error with front body control module (FBCM)
U0151:00
Communication error with SAS control module
U0155:00
Communication error with instrument cluster
U0214:00
Communication error with start stop unit
U0235:68
Communication error with laser sensor
U023A:00
Communication error with forward sensing camera (FSC)
TCM*4
(TCM)
U0073:00
Unit communication error
U0100:00
Communication error with PCM
U0121:00
Communication error with DSC HU/CM
U0131:00
Communication error with EPS control module
U0155:00
Communication error with instrument cluster
U0214:00
Communication error with start stop unit
Front body control module (FBCM)
(F_BCM)
U0001:88
Unit communication error
U0100:00
Communication error with PCM
U0101:00
Communication error with TCM
U0121:00
Communication error with DSC HU/CM
U0151:00
Communication error with SAS control module
U0155:00
Communication error with instrument cluster
U0214:00
Communication error with start stop unit
U023A:00
Communication error with forward sensing camera (FSC)
U0298:00
Communication error with DC-DC converter (i-ELOOP)
AFS control module*5
(AFS)
U0001:88
Unit communication error
U0100:00
Communication error with PCM
U0131:00
Communication error with EPS control module
U0140:00
Communication error with front body control module (FBCM)
U0155:00
Communication error with instrument cluster
Adaptive LED headlights control module*6
(AFS)
U0001:88
Unit communication error
U0100:00
Communication error with PCM
U0121:00
Communication error with DSC HU/CM
U0131:00
Communication error with EPS control module
U0140:00
Communication error with front body control module (FBCM)
U0155:00
Communication error with instrument cluster
U0214:00
Communication error with start stop unit
U023A:00
Communication error with forward sensing camera (FSC)
DC-DC converter (i-ELOOP)*7
(DCDC)
U0001:88
Unit communication error
U0100:00
Communication error with PCM
U0155:00
Communication error with instrument cluster
Electric parking brake control module
(EPB)
U0001:88
Unit communication error
U0100:00
Communication error with PCM
U0101:00
Communication error with TCM
U0121:00
Communication error with DSC HU/CM
U0151:00
Communication error with SAS control module
U0155:00
Communication error with instrument cluster
Position memory control module*8
(DSM)
U0100:00
Communication error with PCM
U0101:00
Communication error with TCM
U0151:00
Communication error with SAS control module
U0155:00
Communication error with instrument cluster
U0214:00
Communication error with start stop unit
Audio amplifier*9
(AM)
U0001:88
Unit communication error
4WD control module*10
(4×4)
U0001:88
Unit communication error
U0100:00
Communication error with PCM
U0101:00
Communication error with TCM
U0121:00
Communication error with DSC HU/CM
Laser sensor*11
(SCBS)
U0001:00
Unit communication error
U0100:00
Communication error with PCM
U0121:00
Communication error with DSC HU/CM
U0131:00
Communication error with EPS control module
U0155:00
Communication error with instrument cluster
Forward sensing camera (FSC)*12
(FSC)
U0001:88
Unit communication error
U0100:00
Communication error with PCM
U0121:00
Communication error with DSC HU/CM
U0131:00
Communication error with EPS control module
U0140:00
Communication error with front body control module (FBCM)
U0155:00
Communication error with instrument cluster
U0182:00
Communication error with AFS control module
U0214:00
Communication error with start stop unit
Connectivity master unit (CMU)*13
(CMU)
U0001:88
Unit communication error
U0100:00
Communication error with PCM
U0101:00
Communication error with TCM
U0104:00
Communication error with radar unit
U0121:00
Communication error with DSC HU/CM
U0131:00
Communication error with EPS control module
U0140:00
Communication error with front body control module (FBCM)
U0151:00
Communication error with SAS control module
U0155:00
Communication error with instrument cluster
U0182:00
Communication error with AFS control module
U0214:00
Communication error with start stop unit
U0235:00
Communication error with laser sensor
U023A:00
Communication error with forward sensing camera (FSC)
EPS control module
(EPS)
U0001:88
Unit communication error
U0100:00
Communication error with PCM
U0121:00
Communication error with DSC HU/CM
U0126:00
Communication error with SAS control module
U0155:00
Communication error with instrument cluster
U0214:00
Communication error with start stop unit
U023A:00
Communication error with forward sensing camera (FSC)
Start stop unit
(SSU)
U0001:88
Unit communication error
U0100:00
Communication error with PCM
U0101:00
Communication error with TCM
U0121:00
Communication error with DSC HU/CM
U0121:87
Communication error with DSC HU/CM
U0131:00
Communication error with EPS control module
U0140:00
Communication error with front body control module (FBCM)
U0146:00
Communication error with instrument cluster
U0151:00
Communication error with SAS control module
U0155:00
Communication error with instrument cluster
SAS control module
(RCM)
U0001:88
Unit communication error
U0155:00
Communication error with instrument cluster
Instrument cluster
(IC)
U0001:88
Unit communication error
U0100:00
Communication error with PCM
U0101:00
Communication error with TCM
U0104:00
Communication error with radar unit
U0114:00
Communication error with 4WD control module
U0121:00
Communication error with DSC HU/CM
U0131:00
Communication error with EPS control module
U0140:00
Communication error with front body control module (FBCM)
U0151:00
Communication error with SAS control module
U0182:00
Communication error with AFS control module
U0214:00
Communication error with start stop unit
U0235:00
Communication error with laser sensor
U023A:00
Communication error with forward sensing camera (FSC)

*1  :SKYACTIV-G 2.0, SKYACTIV-G 2.5
*2  :SKYACTIV-D 2.2
*3  :With mazda radar cruise control (MRCC) system
*4  :ATX
*5  :With adaptive front lighting system (AFS)
*6  :With adaptive LED headlights
*7  :With i-ELOOP system
*8  :With position memory system
*9  :With Bose® type audio
*10  :4WD
*11  :With smart city brake support (SCBS)
*12  :With forward sensing camera (FSC)
*13  :With center display

DTC table (MS-CAN)

DTC output module (M-MDS display)

DTC

Malfunction location
Instrument cluster
(IC)
U0010:88
Unit communication error
U0142:00
Communication error with rear body control module (RBCM)
U0232:00
Communication error with blind spot monitoring (BSM) control module (LH)
Climate control unit
(EATC)
U0010:88
Unit communication error
U0155:00
Communication error with instrument cluster
Parking assist unit (ultrasonic)*1
(PSM)
U0010:88
Unit communication error
U0155:00
Communication error with instrument cluster
Blind spot monitoring (BSM) control module (LH)*2
(BSM)
U0100:00
Communication error with PCM
U0121:00
Communication error with DSC HU/CM
U0155:00
Communication error with instrument cluster
U0214:00
Communication error with start stop unit
Blind spot monitoring (BSM) control module (LH)*3
(BSM)
U0010:88
Unit communication error
U0100:00
Communication error with PCM
U0131:00
Communication error with EPS control module
U0155:00
Communication error with instrument cluster
U0214:00
Communication error with start stop unit
Rear body control module (RBCM)
(R_BCM)
U0010:88
Unit communication error
U0155:00
Communication error with instrument cluster

*1  :With parking sensor system
*2  :With blind spot monitoring (BSM) system (Except Australian specs.)
*3  :With blind spot monitoring (BSM) system (Australian specs.)


Malfunction Diagnosis Procedure

•  After the vehicle is brought in, verify the repair order form and the malfunctioning symptom, and if a CAN malfunction is considered to be the cause, perform CAN malfunction diagnosis to determine if the malfunction is in the CAN system or not.
•  For CAN malfunction diagnosis, the voltage at the CAN connection terminal on the DLC-2 is measured, and based on the measured value, the CAN circuit can be examined or the malfunction symptom can be determined.
•  If the malfunction symptom is not an open circuit, inspect the voltage or continuity at the CAN circuit and determine the malfunctioning part.
•  If the malfunction symptom is an open circuit, determine the area of the open circuit by using the displayed communication error DTC and the module in which communication has failed.

Example: determining open circuit location

1.  Verify the CAN system-related module DTCs and the failed module using the Mazda Modular Diagnostic System (M-MDS).

DTC output module

Mazda Modular Diagnostic System (M-MDS) display

Displayed DTC

System malfunction location
PCM
PCM
U0121:00
Communication error with DSC HU/CM
Radar unit
SBS/MRCC
U0121:00
Communication error with DSC HU/CM
TCM
TCM
U0121:00
Communication error with DSC HU/CM
Front body control module (FBCM)
F_BCM
U0121:00
Communication error with DSC HU/CM
Electric parking brake control module
EPB
U0121:00
Communication error with DSC HU/CM
4WD control module
4×4
U0121:00
Communication error with DSC HU/CM
Laser sensor
SCBS
U0121:00
Communication error with DSC HU/CM
Forward sensing camera (FSC)
FSC
U0121:00
Communication error with DSC HU/CM
Connectivity master unit (CMU)
CMU
U0121:00
Communication error with DSC HU/CM
EPS control module
EPS
U0121:00
Communication error with DSC HU/CM
Start stop unit
SSU
U0121:00
Communication error with DSC HU/CM
Start stop unit
SSU
U0121:87
Communication error with DSC HU/CM
Instrument cluster
IC
U0121:00
Communication error with DSC HU/CM

Module

Fail
DSC HU/CM
×

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2.  The wiring harness between the DSC HU/CM and connector C-32, or the DSC HU/CM itself could have a malfunction because the DTCs indicating a communication error between the following units, in addition to "Fail" on the DSC HU/CM, are displayed even though communication between the PCM and instrument cluster is normal.

•  Between DSC HU/CM and PCM
•  Between DSC HU/CM and radar unit
•  Between DSC HU/CM and TCM
•  Between DSC HU/CM and front body control module (FBCM)
•  Between DSC HU/CM and electric parking brake control module
•  Between DSC HU/CM and 4WD control module
•  Between DSC HU/CM and laser sensor
•  Between DSC HU/CM and forward sensing camera
•  Between DSC HU/CM and connectivity master unit (CMU)
•  Between DSC HU/CM and EPS control module
•  Between DSC HU/CM and start stop unit
•  Between DSC HU/CM and instrument cluster