DETERMINING OPEN CIRCUIT LOCATION (HS-CAN) [MZR 1.6 (L.H.D.)]

id100232000400

Caution

• Perform the following malfunction diagnosis only when it is diagnosed with a open circuit by CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [MZR 1.6 (L.H.D.)].)

• If the malfunctioning part is detected in the communication line, before disconnecting the related connector for inspection, press the connector in the connection direction to verify that there is no looseness or disconnection.

• When disconnecting the connector, verify that there is no damage, deformation, or corrosion of the connector terminals.

1. Verify the CAN system-related module DTCs and the failed module on the M-MDS screen.

2. Apply the communication error DTC and the failed module to DTC output pattern and malfunctioning location, and select the possible cause for the diagnostic result and the reference for the inspection item. (See DTC Output Pattern And Malfunctioning Location.)

Note

• The open circuit location can be determined by the DTC indicated in the DTC output pattern and malfunctioning location chart. DTCs not listed in the chart are not used for the determination of the open circuit location. (See DTC Output Pattern And Malfunctioning Location.)

3. Inspect the possible cause and inspection item of the applicable malfunctioning part.

4. After repairs, return to CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW, and verify that the repairs have been completed. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [MZR 1.6 (L.H.D.)].)

DTC Output Pattern And Malfunctioning Location

Cross (×): Communication error-related DTC and failed module

M-MDS display	DTC	DTC output pattern and malfunctioning location
DTC output module	DTC	DTC output pattern and malfunctioning location
PCM (PCM)	U0121:00		×
	U0131:00								×
	U0140:00						×
	U0151:00										×		×
	U0155:00										×				×		×
	U0214:00									×
ABS^*1 (DSC HU/CM)	U0100:00	×
	U0131:00								×
	U0151:00										×		×
	U0155:00										×				×		×
ABS^*2 (ABS HU/CM)	U0100:00	×
	U0151:00										×		×
	U0155:00										×				×		×
AFS/ALM^*3 (Adaptive LED headlights control module)	U0100:00	×		×
	U0121:00		×	×
	U0131:00								×
	U0140:00						×
	U0155:00										×				×		×
	U0214:00									×
AFS/ALM^*4 (AFS control module / auto leveling control module)	U0100:00	×		×
	U0131:00								×
	U0140:00						×
	U0155:00										×				×		×
F_BCM (Front body control module (FBCM))	U0100:00	×		×		×
	U0121:00		×	×		×
	U0151:00										×		×
	U0155:00										×				×		×
	U0182:00				×	×
	U0214:00									×
EPS (EPS control module	U0100:00	×		×		×		×
	U0121:00		×	×		×		×
	U0155:00										×				×		×
	U0214:00									×
SSU (Start stop unit)	U0100:00	×		×		×		×
	U0121:00		×	×		×		×
	U0121:87		×	×		×		×
	U0131:00								×
	U0140:00						×	×
	U0146:00										×				×		×
	U0151:00										×		×
	U0155:00										×				×		×
CMU^*5 (Connectivity master unit (CMU))	U0100:00	×		×		×		×
	U0121:00		×	×		×		×
	U0131:00								×
	U0140:00						×	×
	U0151:00												×
	U0155:00														×		×
	U0182:00				×	×		×
	U0214:00									×
RCM (SAS control module)	U0155:00														×		×
DCM^*6 (MAZDA ERA-GLONASS control module)	U0100:00	×		×		×		×
	U0121:00		×	×		×		×
	U0151:00												×
	U0155:00														×		×
IC (Instrument cluster)	U0100:00	×		×		×		×
	U0121:00		×	×		×		×
	U0131:00								×
	U0140:00						×	×
	U0151:00												×
	U0156:00											×
	U0182:00				×	×		×
	U0214:00									×
M-MDS display module		[Fail] display pattern
PCM		×		×		×		×
ABS^{1, 2}			×	×		×		×
AFS/ALM^{3, 4}					×	×		×
F_BCM							×	×
EPS									×
SSU										×
CMU^*5											×	×
RCM											×		×
DCM^*6											×			×
AM^*7											×				×	×
IC											×				×		×
Diagnostic result
Possible cause and inspection item		A	B	C	D	E	F	G	H	I	J	K	L	M	N	O	P

*1 :With DSC

*2 :Without DSC

*3 :With adaptive LED headlights system

*4 :With AFS system / headlight auto leveling system

*5 :With center display

*6 :With MAZDA ERA-GLONASS

*7 :With Bose^® type audio

Possible cause

• Connector terminal disconnection, poor contact, damage, deformation, corrosion

• PCM power supply voltage or body ground malfunction

• Open circuit in wiring harness between PCM and connector C-60

• Connector C-60 malfunction

• PCM malfunction

System wiring diagram

am3zzw00019449

Inspection item

• PCM power supply voltage-related wiring harness and fuse

• PCM body ground related wiring harness

• PCM connector

• Connector C-60

• Wiring harness between PCM terminal 1BE and connector C-60

• Wiring harness between PCM terminal 1AZ and connector C-60

• PCM

Possible cause

• Connector terminal disconnection, poor contact, damage, deformation, corrosion

• DSC HU/CM or ABS HU/CM power supply voltage or body ground malfunction

• Open circuit in wiring harness between DSC HU/CM or ABS HU/CM and connector C-60

• Connector C-60 malfunction

• DSC HU/CM or ABS HU/CM malfunction

System wiring diagram

am3zzw00019450

Inspection item

• DSC HU/CM or ABS HU/CM power supply voltage-related wiring harness and fuse

• DSC HU/CM or ABS HU/CM body ground related wiring harness

• DSC HU/CM or ABS HU/CM connector

• Connector C-60

• Wiring harness between DSC HU/CM terminal AF and connector C-60 (with DSC)

• Wiring harness between DSC HU/CM terminal AC and connector C-60 (with DSC)

• Wiring harness between ABS HU/CM terminal H and connector C-60 (without DSC)

• Wiring harness between ABS HU/CM terminal L and connector C-60 (without DSC)

• DSC HU/CM or ABS HU/CM

Possible cause

• Connector terminal disconnection, poor contact, damage, deformation, corrosion

• Open circuit in wiring harness between connector C-60 and connector C-32

• Connector C-60 malfunction

• Connector C-32 malfunction

System wiring diagram

am3zzw00019451

Inspection item

• Connector C-60

• Connector C-32

• Wiring harness between connector C-60 and connector C-32

Possible cause

• Connector terminal disconnection, poor contact, damage, deformation, corrosion

• AFS control module / auto leveling control module / adaptive LED headlights control module power supply voltage or body ground malfunction

• Open circuit in wiring harness between AFS control module / auto leveling control module / adaptive LED headlights control module and connector C-32

• Connector C-32 malfunction

• AFS control module / auto leveling control module / adaptive LED headlights control module malfunction

System wiring diagram

am3zzw00019452

Inspection item

• AFS control module / auto leveling control module / adaptive LED headlights control module power supply voltage-related wiring harness and fuse

• AFS control module / auto leveling control module / adaptive LED headlights control module body ground related wiring harness

• AFS control module / auto leveling control module / adaptive LED headlights control module connector

• Connector C-32

• Wiring harness between AFS control module / auto leveling control module / adaptive LED headlights control module terminal A and connector C-32

• Wiring harness between AFS control module / auto leveling control module / adaptive LED headlights control module terminal B and connector C-32

• AFS control module / auto leveling control module / adaptive LED headlights control module

Possible cause

• Connector terminal disconnection, poor contact, damage, deformation, corrosion

• Open circuit in wiring harness between connector C-32 and front body control module (FBCM)

• Connector C-32 malfunction

• CAN circuit in front body control module (FBCM) malfunction

System wiring diagram

am3zzw00019453

Inspection item

• Front body control module (FBCM) connector

• Connector C-32

• Wiring harness between front body control module (FBCM) terminal 2K and connector C-32

• Wiring harness between front body control module (FBCM) terminal 2I and connector C-32

• Front body control module (FBCM)

― Between front body control module (FBCM) terminal 2K and front body control module (FBCM) terminal 2P

― Between front body control module (FBCM) terminal 2I and front body control module (FBCM) terminal 2N

Possible cause

• Connector terminal disconnection, poor contact, damage, deformation, corrosion

• Front body control module (FBCM) power supply voltage or body ground malfunction

• Front body control module (FBCM) malfunction

System wiring diagram

am3zzw00019454

Inspection item

• Front body control module (FBCM) power supply voltage-related wiring harness and fuse

• Front body control module (FBCM) body ground related wiring harness

• Front body control module (FBCM)

Possible cause

• Connector terminal disconnection, poor contact, damage, deformation, corrosion

• Open circuit in wiring harness between front body control module (FBCM) and connector C-03

• Open circuit in wiring harness between connector C-03 and connector C-12

• Open circuit in wiring harness between connector C-12 and connector C-12

• Open circuit in wiring harness between connector C-12 and connector C-33

• Connector C-03 malfunction

• Connector C-12 malfunction

• Connector C-33 malfunction

• CAN circuit in front body control module (FBCM) malfunction

System wiring diagram

am3zzw00019455

Inspection item

• Connector C-03

• Connector C-12

• Connector C-33

• Front body control module (FBCM) connector

• Wiring harness between connector C-03 and connector C-12

• Wiring harness between connector C-12 and connector C-12

• Wiring harness between connector C-12 and connector C-33

• Wiring harness between front body control module (FBCM) terminal 2P and connector C-03

• Wiring harness between front body control module (FBCM) terminal 2N and connector C-03

• Front body control module (FBCM)

― Between front body control module (FBCM) terminal 2K and front body control module (FBCM) terminal 2P

― Between front body control module (FBCM) terminal 2I and front body control module (FBCM) terminal 2N

Possible cause

• Connector terminal disconnection, poor contact, damage, deformation, corrosion

• EPS control module power supply voltage or body ground malfunction

• Open circuit in wiring harness between EPS control module and connector C-33

• Connector C-33 malfunction

• EPS control module malfunction

System wiring diagram

am3zzw00019456

Inspection item

• EPS control module power supply voltage-related wiring harness and fuse

• EPS control module body ground related wiring harness

• EPS control module connector

• Connector C-33

• Wiring harness between EPS control module terminal 2B and connector C-33

• Wiring harness between EPS control module terminal 2D and connector C-33

• EPS control module

Possible cause

• Connector terminal disconnection, poor contact, damage, deformation, corrosion

• Start stop unit power supply voltage or body ground malfunction

• Open circuit in wiring harness between start stop unit and connector C-33

• Connector C-33 malfunction

• Start stop unit malfunction

System wiring diagram

am3zzw00019457

Inspection item

• Start stop unit power supply voltage-related wiring harness and fuse

• Start stop unit body ground related wiring harness

• Start stop unit connector

• Connector C-33

• Wiring harness between start stop unit terminal 2M and connector C-33

• Wiring harness between start stop unit terminal 2O and connector C-33

• Start stop unit

Possible cause

• Connector terminal disconnection, poor contact, damage, deformation, corrosion

• Connector C-33 malfunction

• Connector C-34 malfunction

• JB No.2 malfunction

System wiring diagram

am3zzw00019458

Inspection item

• Connector C-33

• Connector C-34

• JB No.2

Possible cause

• Connector terminal disconnection, poor contact, damage, deformation, corrosion

• Connectivity master unit (CMU) power supply voltage or body ground malfunction

• Open circuit in wiring harness between connectivity master unit (CMU) and connector C-34

• Connector C-34 malfunction

• Connectivity master unit (CMU) malfunction

System wiring diagram

am3zzw00019459

Inspection item

• Connectivity master unit (CMU) power supply voltage-related wiring harness and fuse

• Connectivity master unit (CMU) body ground related wiring harness

• Connectivity master unit (CMU) connector

• Connector C-34

• Wiring harness between connectivity master unit (CMU) terminal 2E and connector C-34

• Wiring harness between connectivity master unit (CMU) terminal 2F and connector C-34

• Connectivity master unit (CMU)

Possible cause

• Connector terminal disconnection, poor contact, damage, deformation, corrosion

• SAS control module power supply voltage or body ground malfunction

• Open circuit in wiring harness between SAS control module and connector C-34

• Connector C-34 malfunction

• SAS control module malfunction

System wiring diagram

am3zzw00019460

Inspection item

Warning

• Handling the component parts of the SRS air bag system improperly can accidentally operate (deploy) the air bag module, which may seriously injure you. Read the service warnings and cautions before handling the air bag system components of the SRS air bag system.

(See AIR BAG SYSTEM SERVICE WARNINGS.)

(See AIR BAG SYSTEM SERVICE CAUTIONS.)

• SAS control module power supply voltage-related wiring harness and fuse

• SAS control module body ground related wiring harness

• SAS control module connector

• Connector C-34

• Wiring harness between SAS control module terminal 3B and connector C-34

• Wiring harness between SAS control module terminal 3C and connector C-34

• SAS control module

Possible cause

• Connector terminal disconnection, poor contact, damage, deformation, corrosion

• MAZDA ERA-GLONASS control module power supply voltage or body ground malfunction

• Open circuit in wiring harness between connector C-34 and connector C-62

• Open circuit in wiring harness between MAZDA ERA-GLONASS control module and connector C-62

• Connector C-34 malfunction

• Connector C-62 malfunction

• MAZDA ERA-GLONASS control module malfunction

System wiring diagram

am3zzw00020411

Inspection item

• MAZDA ERA-GLONASS control module power supply voltage-related wiring harness and fuse

• MAZDA ERA-GLONASS control module body ground related wiring harness

• MAZDA ERA-GLONASS control module connector

• Connector C-34

• Connector C-62

• Wiring harness between connector C-34 and connector C-62

• Wiring harness between MAZDA ERA-GLONASS control module terminal 1Q and connector C-62

• Wiring harness between MAZDA ERA-GLONASS control module terminal 1S and connector C-62

• MAZDA ERA-GLONASS control module

With Bose^® type audio

Possible cause

• Connector terminal disconnection, poor contact, damage, deformation, corrosion

• Open circuit in wiring harness between connector C-34 and connector C-09

• Open circuit in wiring harness between connector C-09 and connector C-40

• Connector C-34 malfunction

• Connector C-09 malfunction

• Connector C-40 malfunction

System wiring diagram

am3zzw00019461

Inspection item

• Connector C-34

• Connector C-09

• Connector C-40

• Wiring harness between connector C-34 and connector C-09

• Wiring harness between connector C-09 and connector C-40

Without Bose^® type audio

Possible cause

• Connector terminal disconnection, poor contact, damage, deformation, corrosion

• Instrument cluster power supply voltage or body ground malfunction

• Open circuit in wiring harness between connector C-34 and connector C-09

• Open circuit in wiring harness between connector C-09 and connector C-09

• Open circuit in wiring harness between connector C-09 and connector instrument cluster

• Connector C-34 malfunction

• Connector C-09 malfunction

• Instrument cluster malfunction

System wiring diagram

am3zzw00019462

Inspection item

• Instrument cluster power supply voltage-related wiring harness and fuse

• Instrument cluster body ground related wiring harness

• Connector C-34

• Connector C-09

• Instrument cluster connector

• Wiring harness between connector C-34 and connector C-09

• Wiring harness between connector C-09 and connector C-09

• Wiring harness between instrument cluster terminal B and connector C-09

• Wiring harness between instrument cluster terminal D and connector C-09

• Instrument cluster

Possible cause

• Connector terminal disconnection, poor contact, damage, deformation, corrosion

• Audio amplifier power supply voltage or body ground malfunction

• Open circuit in wiring harness between audio amplifier and connector C-40

• Connector C-40 malfunction

• Audio amplifier malfunction

System wiring diagram

am3zzw00019463

Inspection item

• Audio amplifier power supply voltage-related wiring harness and fuse

• Audio amplifier body ground related wiring harness

• Audio amplifier connector

• Connector C-40

• Wiring harness between audio amplifier terminal 2L and connector C-40

• Wiring harness between audio amplifier terminal 2N and connector C-40

• Audio amplifier

Possible cause

• Connector terminal disconnection, poor contact, damage, deformation, corrosion

• Instrument cluster power supply voltage or body ground malfunction

• Open circuit in wiring harness between connector C-40 and connector C-09

• Open circuit in wiring harness between connector C-09 and instrument cluster

• Connector C-40 malfunction

• Connector C-09 malfunction

• Instrument cluster malfunction

System wiring diagram

am3zzw00019464

Inspection item

• Instrument cluster power supply voltage-related wiring harness and fuse

• Instrument cluster body ground related wiring harness

• Instrument cluster connector

• Connector C-40

• Connector C-09

• Wiring harness between connector C-40 and connector C-09

• Wiring harness between instrument cluster terminal B and connector C-09

• Wiring harness between instrument cluster terminal D and connector C-09

• Instrument cluster