DETERMINING OPEN CIRCUIT LOCATION (HS-CAN) [SKYACTIV-D 2.2 (ATX), MZR 1.6]

id100211000400

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 [SKYACTIV-D 2.2 (ATX), MZR 1.6].)

• 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 [SKYACTIV-D 2.2 (ATX), MZR 1.6].)

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^*1 (PCM)	U0101:00							×
	U0104:00														×			×		×
	U0121:00		×
	U0131:00													×
	U0140:00			×
	U0151:00														×	×
	U0155:00														×			×			×
	U0214:00												×
	U0235:00									×
	U0298:00					×
PCM^*2 (PCM)	U0121:00		×
	U0131:00													×
	U0151:00														×	×
	U0155:00														×			×			×
	U0214:00												×
ABS^*3 (ABS HU/CM)	U0100:00	×
	U0151:00														×	×
	U0155:00														×			×			×
ABS^*4 (DSC HU/CM)	U0100:00	×
	U0101:00							×
	U0104:00														×			×		×
	U0131:00													×
	U0151:00														×	×
	U0155:00														×			×			×
	U0235:00									×
F_BCM (Front body control module (FBCM))	U0100:00	×
	U0101:00							×
	U0121:00		×
	U0151:00														×	×
	U0155:00														×			×			×
	U0214:00												×
	U023A:00										×
DCDC^*5 (DC-DC converter (i-ELOOP))	U0100:00	×			×
DCDC^*5 (DC-DC converter (i-ELOOP))	U0155:00														×			×			×
AFS/ALM^*6 (AFS control module / auto leveling control module)	U0100:00	×			×
	U0131:00													×
	U0140:00			×	×
	U0155:00														×			×			×
TCM*⁷ (TCM)	U0100:00	×			×
	U0121:00		×		×
	U0131:00													×
	U0155:00														×			×			×
	U0214:00												×
SCBS^8 (Laser sensor)	U0100:00	×			×				×
	U0121:00		×		×				×
	U0131:00													×
	U0155:00														×			×			×
FSC*⁹ (Forward sensing camera (FSC))	U0100:00	×			×				×
	U0121:00		×		×				×
	U0131:00													×
	U0140:00			×	×				×
	U0155:00														×			×			×
	U0214:00												×
SSU (Start stop unit)	U0100:00	×			×				×			×
	U0101:00							×	×			×
	U0121:00		×		×				×			×
	U0121:87		×		×				×			×
	U0131:00													×
	U0140:00			×	×				×			×
	U0146:00														×			×			×
	U0151:00														×	×
	U0155:00														×			×			×
EPS (EPS control module	U0100:00	×			×				×			×
	U0121:00		×		×				×			×
	U0155:00														×			×			×
	U0214:00												×
RCM (SAS control module)	U0155:00																	×			×
CMU^*10 (Connectivity master unit (CMU))	U0100:00	×			×				×			×
	U0101:00							×	×			×
	U0104:00																	×		×
	U0121:00		×		×				×			×
	U0131:00													×
	U0140:00			×	×				×			×
	U0151:00															×
	U0155:00																	×			×
	U0182:00						×		×			×
	U0214:00												×
	U0235:00									×		×
	U023A:00										×	×
SBS/MRCC^*11 (Vehicle control module (V/C-module))	U0100:00	×			×				×			×
	U0101:00							×	×			×
	U0121:00		×		×				×			×
	U0131:00													×
	U0140:00			×	×				×			×
	U0151:00															×
	U0155:00																				×
	U0214:00												×
	U0235:68									×		×
	U023A:00										×	×
IC (Instrument cluster)	U0100:00	×			×				×			×
	U0101:00							×	×			×
	U0104:00																			×
	U0121:00		×		×				×			×
	U0131:00													×
	U0140:00			×	×				×			×
	U0151:00															×
	U0156:00																×
	U0182:00						×		×			×
	U0214:00												×
	U0235:00									×		×
	U023A:00										×	×
M-MDS display module		[Fail] display pattern
PCM^{1, 2}		×			×				×			×
ABS^3,4			×		×				×			×
F_BCM				×	×				×			×
DCDC^*5						×			×			×
AFS/ALM^*6							×		×			×
TCM^*7								×	×			×
SCBS^*8										×		×
FSC^*9											×	×
SSU													×
EPS														×
RCM															×	×
CMU^*10															×		×
SBS/MRCC^*11															×			×		×
AM^*12															×			×	×
IC															×			×			×
Diagnostic result
Possible cause and inspection item		A	B	C	D	E	F	G	H	I	J	K	L	M	N	O	P	Q	R	S	T

*1 :SKYACTIV-D 2.2 (ATX)

*2 :MZR 1.6

*3 :Without DSC

*4 :With DSC

*5 :With i-ELOOP

*6 :With AFS system / headlight auto leveling system

*7 :ATX

*8 :With smart city brake support (SCBS)

*9 :With forward sensing camera (FSC)

*10 :With center display

*11 :With Mazda Radar Cruise Control (MRCC) system

*12 :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 front body control module (FBCM)

• PCM control module malfunction

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

System wiring diagram

am3zzw00017861

Inspection item

• PCM power supply voltage-related wiring harness and fuse

• PCM body ground related wiring harness

• Front body control module (FBCM) connector

• PCM connector

• Wiring harness between PCM terminal 2AK and front body control module (FBCM) terminal 2P (With SKYACTIV-D 2.2)

• Wiring harness between PCM terminal 2AL and front body control module (FBCM) terminal 2N (With SKYACTIV-D 2.2)

• Wiring harness between PCM terminal 1BE and front body control module (FBCM) terminal 2P (with MZR 1.6)

• Wiring harness between PCM terminal 1AZ and front body control module (FBCM) terminal 2P (with MZR 1.6)

• PCM

• Front body control module (FBCM)

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

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

Possible cause

Without DSC

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

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

• Open circuit in wiring harness between ABS HU/CM and front body control module (FBCM)

• ABS HU/CM control module malfunction

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

With DSC

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

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

• Open circuit in wiring harness between DSC HU/CM and front body control module (FBCM)

• DSC HU/CM control module malfunction

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

System wiring diagram

am3zzw00017862

Inspection item

Without DSC

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

• ABS HU/CM body ground related wiring harness

• Front body control module (FBCM) connector

• ABS HU/CM connector

• Wiring harness between front body control module (FBCM) terminal 2R and ABS HU/CM terminal H

• Wiring harness between front body control module (FBCM) terminal 2L and ABS HU/CM terminal L

• ABS HU/CM

• Front body control module (FBCM)

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

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

With DSC

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

• DSC HU/CM body ground related wiring harness

• Front body control module (FBCM) connector

• DSC HU/CM connector

• Wiring harness between front body control module (FBCM) terminal 2R and DSC HU/CM terminal AF

• Wiring harness between front body control module (FBCM) terminal 2L and DSC HU/CM terminal AC

• DSC HU/CM

• Front body control module (FBCM)

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

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

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

am3zzw00017863

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-32

• Connector C-32 malfunction

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

System wiring diagram

am3zzw00017864

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

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

Possible cause

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

• DC-DC converter (i-ELOOP) power supply voltage or body ground malfunction

• Open circuit in wiring harness between DC-DC converter (i-ELOOP) and connector C-05

• Open circuit in wiring harness between connector C-05 and connector C-32

• Connector C-05 malfunction

• Connector C-32 malfunction

• DC-DC converter (i-ELOOP) malfunction

System wiring diagram

am3zzw00017865

Inspection item

• DC-DC converter (i-ELOOP) power supply voltage-related wiring harness and fuse

• DC-DC converter (i-ELOOP) body ground related wiring harness

• DC-DC converter (i-ELOOP) connector

• Connector C-05

• Connector C-32

• Wiring harness between DC-DC converter (i-ELOOP) terminal 1A and connector C-05

• Wiring harness between DC-DC converter (i-ELOOP) terminal 1C and connector C-05

• Wiring harness between connector C-05 and connector C-32

• DC-DC converter (i-ELOOP)

Possible cause

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

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

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

• Connector C-32 malfunction

• AFS control module / auto leveling control module malfunction

System wiring diagram

am3zzw00017866

Inspection item

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

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

• AFS control module / auto leveling control module connector

• Connector C-32

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

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

• AFS control module / auto leveling control module

Possible cause

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

• TCM power supply voltage or body ground malfunction

• Open circuit in wiring harness between TCM and connector C-01

• Open circuit in wiring harness between connector C-01 and connector C-32

• Connector C-01 malfunction

• Connector C-32 malfunction

• TCM malfunction

System wiring diagram

am3zzw00017867

Inspection item

• TCM power supply voltage-related wiring harness and fuse

• TCM body ground related wiring harness

• TCM connector

• Connector C-01

• Connector C-32

• Wiring harness between TCM terminal E and connector C-01

• Wiring harness between TCM terminal F and connector C-01

• Wiring harness between connector C-01 and connector C-32

• TCM

With smart city brake support (SCBS) and forward sensing camera (FSC)

Possible cause

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

• Open circuit in wiring harness between connector C-32 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-42

• Connector C-32 malfunction

• Connector C-03 malfunction

• Connector C-12 malfunction

• Connector C-42 malfunction

System wiring diagram

am3zzw00017868

Inspection item

• Connector C-32

• Connector C-03

• Connector C-12

• Connector C-42

• Wiring harness between connector C-32 and connector C-03

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

• Wiring harness between connector C-12 and connector C-42

L.H.D. without smart city brake support (SCBS) or forward sensing camera (FSC)

Possible cause

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

• Open circuit in wiring harness between connector C-32 and connector C-03

• Open circuit in wiring harness between connector C-03 and connector C-33

• Connector C-32 malfunction

• Connector C-03 malfunction

• Connector C-33 malfunction

System wiring diagram

am3zzw00017869

Inspection item

• Connector C-32

• Connector C-03

• Connector C-33

• Wiring harness between connector C-32 and connector C-03

• Wiring harness between connector C-03 and connector C-33

R.H.D. without smart city brake support (SCBS) or forward sensing camera (FSC)

Possible cause

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

• Open circuit in wiring harness between connector C-32 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-32 malfunction

• Connector C-03 malfunction

• Connector C-12 malfunction

• Connector C-33 malfunction

System wiring diagram

am3zzw00017870

Inspection item

• Connector C-32

• Connector C-03

• Connector C-12

• Connector C-33

• Wiring harness between connector C-32 and connector C-03

• 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

Possible cause

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

• Laser sensor power supply voltage or body ground malfunction

• Open circuit in wiring harness between Laser sensor and connector C-42

• Connector C-42 malfunction

• Laser sensor malfunction

System wiring diagram

am3zzw00017871

Inspection item

• Laser sensor power supply voltage-related wiring harness and fuse

• Laser sensor body ground related wiring harness

• Laser sensor connector

• Connector C-42

• Wiring harness between laser sensor terminal D and connector C-42

• Wiring harness between laser sensor terminal C and connector C-42

• Laser sensor

Possible cause

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

• Forward sensing camera (FSC) power supply voltage or body ground malfunction

• Open circuit in wiring harness between forward sensing camera (FSC) and connector C-27

• Open circuit in wiring harness between connector C-27 and connector C-42

• Connector C-27 malfunction

• Connector C-42 malfunction

• Forward sensing camera (FSC) malfunction

System wiring diagram

am3zzw00017872

Inspection item

• Forward sensing camera (FSC) power supply voltage-related wiring harness and fuse

• Forward sensing camera (FSC) body ground related wiring harness

• Forward sensing camera (FSC) connector

• Connector C-27

• Connector C-42

• Wiring harness between forward sensing camera (FSC) terminal E and connector C-27

• Wiring harness between forward sensing camera (FSC) terminal C and connector C-27

• Wiring harness between connector C-27 and connector C-42

• Forward sensing camera (FSC)

Possible cause

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

• Open circuit in wiring harness between connector C-42 and connector C-12

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

• Connector C-42 malfunction

• Connector C-12 malfunction

• Connector C-33 malfunction

System wiring diagram

am3zzw00017873

Inspection item

• Connector C-42

• Connector C-12

• Connector C-33

• Wiring harness between connector C-42 and connector C-12

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

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

am3zzw00017874

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

• 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

am3zzw00017875

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

• Connector C-33 malfunction

• Connector C-34 malfunction

• JB No.2 malfunction

System wiring diagram

am3zzw00017876

Inspection item

• Connector C-33

• Connector C-34

• JB No.2

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

am3zzw00017877

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 3K and connector C-34 (with connector 22-pin type)

• Wiring harness between SAS control module terminal 3L and connector C-34 (with connector 22-pin type)

• Wiring harness between SAS control module terminal 3B and connector C-34 (with connector 32-pin type)

• Wiring harness between SAS control module terminal 3C and connector C-34 (with connector 32-pin type)

• SAS control module

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

am3zzw00017878

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)

With Bose^® type audio and mazda radar cruise control (MRCC) system

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

am3zzw00017879

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 or mazda radar cruise control (MRCC) system

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 instrument cluster

• Connector C-34 malfunction

• Connector C-09 malfunction

• Instrument cluster malfunction

System wiring diagram

am3zzw00017880

Inspection item

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

• Instrument cluster body ground related wiring harness

• Instrument cluster connector

• Connector C-34

• Connector C-09

• 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

am3zzw00017881

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

• Vehicle control module (V/C-module) power supply voltage or body ground malfunction

• Open circuit in wiring harness between vehicle control module (V/C-module) and connector C-40

• Connector C-40 malfunction

• Vehicle control module (V/C-module) malfunction

System wiring diagram

am3zzw00017882

Inspection item

• Vehicle control module (V/C-module) power supply voltage-related wiring harness and fuse

• Vehicle control module (V/C-module) body ground related wiring harness

• Vehicle control module (V/C-module) connector

• Connector C-40

• Wiring harness between vehicle control module (V/C-module) terminal S and connector C-40

• Wiring harness between vehicle control module (V/C-module) terminal U and connector C-40

• Vehicle control module (V/C-module)

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

am3zzw00017883

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