DETERMINING OPEN CIRCUIT LOCATION (HS-CAN) [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5, SKYACTIV-D 2.2 (MTX)]

id100210000400

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-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5, SKYACTIV-D 2.2 (MTX)].)

• 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-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5, SKYACTIV-D 2.2 (MTX)].)

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)	U0101:00					×
	U0104:00															×			×		×
	U0121:00		×
	U0131:00														×
	U0140:00			×
	U0151:00															×	×
	U0155:00															×			×			×
	U0214:00													×
	U0235:00										×
	U0298:00							×
ABS (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											×
TCM^*1 (TCM)	U0100:00	×			×
	U0121:00		×		×
	U0131:00														×
	U0155:00															×			×			×
	U0214:00													×
DCDC^*2 (DC-DC converter (i-ELOOP))	U0100:00	×			×		×
DCDC^*2 (DC-DC converter (i-ELOOP))	U0155:00															×			×			×
AFS/ALM^*3 (AFS control module / auto leveling control module)	U0100:00	×			×		×
	U0131:00														×
	U0140:00			×	×		×
	U0155:00															×			×			×
SCBS^4 (Laser sensor)	U0100:00	×			×		×			×
	U0121:00		×		×		×			×
	U0131:00														×
	U0155:00															×			×			×
FSC^*5 (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^*6 (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^*7 (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		×			×		×			×			×
ABS			×		×		×			×			×
F_BCM				×	×		×			×			×
TCM^*1						×	×			×			×
DCDC^*2								×		×			×
AFS/ALM^*3									×	×			×
SCBS^*4											×		×
FSC^*5												×	×
SSU														×
EPS															×
RCM																×	×
CMU^*6																×		×
AM^*8																×			×	×
SBS/MRCC^*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	Q	R	S	T	U

*1 :ATX

*2 :With i-ELOOP system

*3 :With AFS system / auto leveling system

*4 :With smart city brake support (SCBS)

*5 :With forward sensing camera (FSC)

*6 :With center display

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

*8 :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 malfunction

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

System wiring diagram

am3zzw00016932

Inspection item

• PCM power supply voltage-related wiring harness and fuse

• PCM body ground related wiring harness

• PCM connector

• Front body control module (FBCM) connector

• Wiring harness between PCM terminal 2AK and Front body control module (FBCM) terminal 2P

• Wiring harness between PCM terminal 2AL and Front body control module (FBCM) terminal 2N

• PCM

• 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

• 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

am3zzw00016933

Inspection item

• 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

am3zzw00016934

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)

ATX

Possible cause

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

• Open circuit in wiring harness between front body control module (FBCM) and connector C-01

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

• Connector C-01 malfunction

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

System wiring diagram

am3zzw00016935

Inspection item

• Front body control module (FBCM) connector

• Connector C-01

• Wiring harness between front body control module (FBCM) terminal 2K and connector C-01

• Wiring harness between front body control module (FBCM) terminal 2I and connector C-01

• Wiring harness between connector C-01 and branch A

• 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

MTX

Possible cause

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

• Open circuit in wiring harness between front body control module (FBCM) and connector C-01

• Open circuit in wiring harness between connector C-01 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

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

System wiring diagram

am3zzw00016936

Inspection item

• Front body control module (FBCM) connector

• Connector C-01

• Connector C-32

• Wiring harness between front body control module (FBCM) terminal 2K and connector C-01

• Wiring harness between front body control module (FBCM) terminal 2I and connector C-01

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

• Wiring harness between connector C-01 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

• TCM power supply voltage or body ground malfunction

• Open circuit in wiring harness between TCM and branch A

• TCM malfunction

System wiring diagram

am3zzw00016937

Inspection item

• TCM power supply voltage-related wiring harness and fuse

• TCM body ground related wiring harness

• TCM connector

• Wiring harness between TCM terminal E and branch A

• Wiring harness between TCM terminal F and branch A

• TCM

Possible cause

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

• Open circuit in wiring harness between branch A 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

System wiring diagram

am3zzw00016938

Inspection item

• Connector C-01

• Connector C-32

• Wiring harness between branch A and connector C-01

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

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

am3zzw00016939

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

am3zzw00016940

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

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

am3zzw00016941

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

am3zzw00017849

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

am3zzw00017850

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

am3zzw00016943

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

am3zzw00016944

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

am3zzw00016945

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

am3zzw00016946

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

am3zzw00016947

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

am3zzw00016948

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

am3zzw00016949

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 (with connector 22-pin type) /3B (with connector 32-pin type) and connector C-34

• Wiring harness between SAS control module terminal 3L (with connector 22-pin type) /3C (with connector 32-pin type) and connector C-34

• 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

am3zzw00016950

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

am3zzw00016951

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 connector instrument cluster

• Connector C-34 malfunction

• Connector C-09 malfunction

• Instrument cluster malfunction

System wiring diagram

am3zzw00016952

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

am3zzw00016953

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

am3zzw00016954

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 connector instrument cluster

• Connector C-40 malfunction

• Connector C-09 malfunction

• Instrument cluster malfunction

System wiring diagram

am3zzw00016955

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