2014 - Mazda6 - Multiplex Communication System

DETERMINING OPEN CIRCUIT LOCATION (HS-CAN)

CAUTION:

• Perform the following malfunction diagnosis only when it is diagnosed with a open circuit by CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW.

• 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.

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.

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.

DTC output pattern and malfunctioning location

*1

ATX vehicles

*2

With AFS system

*3

With smart brake support

*4

With i-ELOOP system

*5

With power seat

*6

With smart city brake support

*7

With forward sensing camera

*8

With Bose^®

A

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-32

• Connector C-32 malfunction

• PCM malfunction

System wiring diagram

Inspection item

• PCM power supply voltage-related wiring harness and fuse

• PCM body ground related wiring harness

• PCM connector

• Connector C-32

• Wiring harness between PCM terminal 2AK and connector C-32

• Wiring harness between PCM terminal 2AL and connector C-32

• PCM

B

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 connector C-32

• Connector C-32 malfunction

• DSC HU/CM malfunction

System wiring diagram

Inspection item

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

• DSC HU/CM body ground related wiring harness

• DSC HU/CM connector

• Connector C-32

• Wiring harness between DSC HU/CM terminal E and connector C-32

• Wiring harness between DSC HU/CM terminal D and connector C-32

• DSC HU/CM

C

ATX vehicles

Possible cause

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

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

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

• Connector C-32 malfunction

• Connector C-01 malfunction

System wiring diagram

Inspection item

• Connector C-32

• Connector C-01

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

• Wiring harness between connector C-01 and branch A

MTX vehicles

Possible cause

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

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

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

System wiring diagram

Inspection item

• Front body control module (FBCM) connector

• Connector C-32

• Connector C-01

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

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

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

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

• 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

D

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

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

E

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 front body control module (FBCM)

• Connector C-01 malfunction

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

System wiring diagram

Inspection item

• Front body control module (FBCM) connector

• Connector C-01

• Wiring harness between branch A and connector C-01

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

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

• 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

F

Possible cause

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

• AFS control module power supply voltage or body ground malfunction

• Open circuit in wiring harness between AFS control module and front body control module (FBCM)

• AFS control module malfunction

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

System wiring diagram

Inspection item

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

• AFS control module body ground related wiring harness

• Front body control module (FBCM) connector

• AFS control module connector

• Wiring harness between front body control module (FBCM) terminal 2R and AFS control module terminal AB

• Wiring harness between front body control module (FBCM) terminal 2L and AFS control module terminal AD

• AFS control module

• 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

G

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

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)

H

Vehicles with Smart Brake Support (SBS) and i-ELOOP

Possible cause

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

• Open circuit in wiring harness between front body control module (FBCM) and connector C-04

• Open circuit in wiring harness between connector C-04 and connectors C-49, C-50

• Connector C-04 malfunction

• Connectors C-49, C-50 malfunction

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

System wiring diagram

Inspection item

• Front body control module (FBCM) connector

• Connector C-04

• Connectors C-49, C-50

• Wiring harness between front body control module (FBCM) terminal 2K and connector C-04

• Wiring harness between front body control module (FBCM) terminal 2I and connector C-04

• Wiring harness between connector C-04 and connectors C-49, C-50

• 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

Vehicles without Smart Brake Support (SBS) and i-ELOOP

Possible cause

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

• Open circuit in wiring harness between front body control module (FBCM) and connector C-04

• Open circuit in wiring harness between connector C-04 and connectors C-51,C-52

• Connector C-04 malfunction

• Connectors C-51,C-52 malfunction

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

System wiring diagram

Inspection item

• Connector C-04

• Connectors C-51,C-52

• Wiring harness between front body control module (FBCM) terminal 2K and connector C-04

• Wiring harness between front body control module (FBCM) terminal 2I and connector C-04

• Wiring harness between connector C-04 and connectors C-51,C-52

• 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

I

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 connectors C-49,C-50

• Connectors C-49,C-50 malfunction

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

System wiring diagram

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

• Connectors C-49,C-50

• Wiring harness between vehicle control module (V/C-module) terminal S and connectors C-49,C-50

• Wiring harness between vehicle control module (V/C-module) terminal U and connectors C-49,C-50

• Vehicle control module (V/C-module)

J

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 connectors C-49,C-50

• Connectors C-49,C-50 malfunction

• DC-DC converter (i-ELOOP) malfunction

System wiring diagram

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

• Connectors C-49,C-50

• Wiring harness between DC-DC converter (i-ELOOP) terminal 1A and connectors C-49,C-50

• Wiring harness between DC-DC converter (i-ELOOP) terminal 1C and connectors C-49,C-50

• DC-DC converter (i-ELOOP)

K

Possible cause

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

• Open circuit in wiring harness between connectors C-49,C-50 and connectors C-51,C-52

• Connectors C-49,C-50 malfunction

• Connectors C-51,C-52 malfunction

System wiring diagram

Inspection item

• Connectors C-49,C-50

• Connectors C-51,C-52

• Wiring harness between connectors C-49,C-50 and connectors C-51,C-52

L

Possible cause

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

• Position memory control module power supply voltage or body ground malfunction

• Open circuit in wiring harness between position memory control module and connector C-55

• Open circuit in wiring harness between connector C-55 and connectors C-51,C-52

• Connector C-55 malfunction

• Connectors C-51, C-52 malfunction

• Position memory control module malfunction

System wiring diagram

Inspection item

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

• Position memory control module body ground related wiring harness

• Position memory control module connector

• Connector C-55

• Connectors C-51, C-52

• Wiring harness between position memory control module terminal 1C and connectors C-55

• Wiring harness between position memory control module terminal 1E and connectors C-55

• Wiring harness between connector C-55 and connectors C-51,C-52

• Position memory control module

M

Possible cause

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

• Open circuit in wiring harness between connectors C-51,C-52 and connector C-10

• Open circuit in wiring harness between connector C-10 and connector C-11

• Open circuit in wiring harness between connector C-11 and connector C-42

• Connectors C-51,C-52 malfunction

• Connector C-10 malfunction

• Connector C-11 malfunction

• Connector C-42 malfunction

System wiring diagram

Inspection item

• Connectors C-51,C-52

• Connector C-10

• Connector C-11

• Connector C-42

• Wiring harness between connectors C-51,C-52 and connector C-10

• Wiring harness between connector C-10 and connector C-11

• Wiring harness between connector C-11 and connector C-42

N

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

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

O

Possible cause

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

• Forward sensing camera power supply voltage or body ground malfunction

• Open circuit in wiring harness between forward sensing camera 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 malfunction

System wiring diagram

Inspection item

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

• Forward sensing camera body ground related wiring harness

• Forward sensing camera connector

• Connector C-27

• Connector C-42

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

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

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

• Forward sensing camera

P

Possible cause

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

• Open circuit in wiring harness between connector C-42 and connector C-11

• Open circuit in wiring harness between connector C-11 and connector C-34

• Connector C-42 malfunction

• Connector C-11 malfunction

• Connector C-34 malfunction

System wiring diagram

Inspection item

• Connector C-42

• Connector C-11

• Connector C-34

• Wiring harness between connector C-42 and connector C-11

• Wiring harness between connector C-11 and connector C-34

Q

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-34

• Connector C-34 malfunction

• EPS control module malfunction

System wiring diagram

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-34

• Wiring harness between EPS control module terminal 2A and connector C-34

• Wiring harness between EPS control module terminal 2D and connector C-34

• EPS control module

R

Possible cause

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

• Open circuit in wiring harness between connector C-34 and connector C-35

• Connector C-34 malfunction

• Connector C-35 malfunction

System wiring diagram

Inspection item

• Connector C-34

• Connector C-35

• Wiring harness between connector C-34 and connector C-35

S

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-35

• Connector C-35 malfunction

• Start stop unit malfunction

System wiring diagram

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-35

• Wiring harness between start stop unit terminal 2M and connector C-35

• Wiring harness between start stop unit terminal 2O and connector C-35

• Start stop unit

T

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-35

• Connector C-35 malfunction

• SAS control module malfunction

System wiring diagram

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 [STANDARD DEPLOYMENT CONTROL SYSTEM].)

  (See AIR BAG SYSTEM SERVICE CAUTIONS [STANDARD DEPLOYMENT CONTROL SYSTEM].)

  (See AIR BAG SYSTEM SERVICE WARNINGS [TWO-STEP DEPLOYMENT CONTROL SYSTEM].)

  (See AIR BAG SYSTEM SERVICE CAUTIONS [TWO-STEP DEPLOYMENT CONTROL SYSTEM].)

• 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-35

• Wiring harness between SAS control module terminal 3K and connector C-35

• Wiring harness between SAS control module terminal 3L and connector C-35

• SAS control module

U

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-35

• Connector C-35 malfunction

• Audio amplifier malfunction

System wiring diagram

Inspection item

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

• Audio amplifier body ground related wiring harness

• Audio amplifier connector

• Connector C-35

• Wiring harness between audio amplifier terminal 2L and connector C-35

• Wiring harness between audio amplifier terminal 2N and connector C-35

• Audio amplifier

V

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 instrument cluster and connector C-35

• Connector C-35 malfunction

• Instrument cluster malfunction

System wiring diagram

Inspection item

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

• Instrument cluster body ground related wiring harness

• Instrument cluster connector

• Connector C-35

• Wiring harness between instrument cluster terminal B and connector C-35

• Wiring harness between instrument cluster terminal D and connector C-35

• Instrument cluster