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

id100235000400

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 (R.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 (R.H.D.)].)

DTC Output Pattern And Malfunctioning Location

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-60

•  Connector C-60 malfunction

•  PCM malfunction

System wiring diagram

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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

B

Possible cause

•  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 connector C-60

•  Connector C-60 malfunction

•  ABS HU/CM malfunction

System wiring diagram

am3zzw00019555

Inspection item

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

•  ABS HU/CM body ground related wiring harness

•  ABS HU/CM connector

•  Connector C-60

•  Wiring harness between ABS HU/CM terminal H and connector C-60

•  Wiring harness between ABS HU/CM terminal L and connector C-60

•  ABS HU/CM

C

Possible cause

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

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

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

•  Connector C-60 malfunction

•  Connector C-32 malfunction

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

System wiring diagram

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Inspection item

•  Connector C-60

•  Connector C-32

•  Front body control module (FBCM) connector

•  Wiring harness between connector C-60 and 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

D

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

am3zzw00019557

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)

E

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

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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 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

•  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

am3zzw00019559

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

G

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

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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

H

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

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Inspection item

•  Connector C-33

•  Connector C-34

•  JB No.2

I

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

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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

J

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

am3zzw00019563

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