DETERMINING MALFUNCTIONING PART (MS-CAN) [MULTIPLEX COMMUNICATION SYSTEM (L.H.D.)]

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  Caution
  • 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.

Type A (Blind Spot Monitoring (BSM) Control Module Connector 8-pin Type)

1. Verify DTCs of the modules related to the CAN system.

2. Apply the following items to the DTC Output Pattern and Malfunctioning Part, and then verify the reference to the malfunctioning location. (See DTC Output Pattern and Malfunctioning Part.)

  • Communication error DTCs
  • Malfunctioning module

  Note
  • A hyphen(-) in the DTC output pattern cell indicates that the DTC may be displayed depending on the malfunction detection conditions. If it is not displayed, the malfunctioning part can be determined by checking only the crosses (×).

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

4. Perform the DTC inspection after the repair procedure.

  • If any DTC is displayed, return to FOREWORD. (See FOREWORD [MULTIPLEX COMMUNICATION SYSTEM (L.H.D.)].)

DTC Output Pattern and Malfunctioning Part

Cross (×): Displayed
Hyphen (-): May or may not be displayed

DTC display | DTC display pattern
--- | ---
DTC output module | DTC | A | B | C | D | E | F | G | H
Information display*6 | 02:1E*1 |  |  | × | × | × |  | × | ×
02:3E*1 | × | × |  |  | × |  | × | ×
Information display*7 | 02 1E*1 |  |  | × | × | × |  | × | ×
02 3E*1 | × | × |  |  | × |  | × | ×
M-MDS display module | “Fail” display pattern
IC*3 | × |  |  |  | × |  | × |
ACU*4 |  |  | × |  | × |  | × |
AM*5 |  |  |  |  |  | × | × |
Information display | Display pattern on information display
02:1-*2 |  |  | - | - | - |  | - | -

*1 :The DTC is displayed on the information display.
*2 :If "02:1-" is displayed on the information display, no DTC is displayed.
*3 :Instrument cluster
*4 :Audio unit
*5 :Audio amplifier
*6 :With clock display
*7 :Without clock display

A

  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 branch A
  • Instrument cluster malfunction

System wiring diagram

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  Inspection item

  • Instrument cluster power supply voltage-related wiring harness and fuse
  • Instrument cluster body ground related wiring harness
  • Instrument cluster connector
  • Wiring harness between instrument cluster terminal 1T and branch A
  • Wiring harness between instrument cluster terminal 1S and branch A
  • Instrument cluster

B

  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 branch A
  • Instrument cluster malfunction

System wiring diagram

ac9wzw00002662

  Inspection item

  • Instrument cluster power supply voltage-related wiring harness and fuse
  • Instrument cluster body ground related wiring harness
  • Instrument cluster connector
  • Wiring harness between instrument cluster terminal 1T and branch A
  • Wiring harness between instrument cluster terminal 1S and branch A
  • Instrument cluster

C

  Possible cause

  • Connector terminal disconnection, poor contact, damage, deformation, corrosion
  • Audio unit power supply voltage or body ground malfunction
  • Open circuit in wiring harness between audio unit and branch A
  • Audio unit malfunction

System wiring diagram

ac9wzw00002663

  Inspection item

  • Audio unit power supply voltage-related wiring harness and fuse
  • Audio unit body ground related wiring harness
  • Audio unit connector
  • Wiring harness between audio unit terminal 1O and branch A
  • Wiring harness between audio unit terminal 1Q and branch A
  • Audio unit

D

  Possible cause

  • Connector terminal disconnection, poor contact, damage, deformation, corrosion
  • Audio unit power supply voltage or body ground malfunction
  • Open circuit in wiring harness between audio unit and branch A
  • Audio unit malfunction

System wiring diagram

ac9wzw00002664

  Inspection item

  • Audio unit power supply voltage-related wiring harness and fuse
  • Audio unit body ground related wiring harness
  • Audio unit connector
  • Wiring harness between audio unit terminal 1O and branch A
  • Wiring harness between audio unit terminal 1Q and branch A
  • Audio unit

E

  Possible cause

  • Connector terminal disconnection, poor contact, damage, deformation, corrosion
  • Open circuit in wiring harness between branch A and connector C-25
  • Open circuit in wiring harness between connector C-25 and branch B
  • Connector C-25 malfunction

System wiring diagram

ac9wzw00002665

  Inspection item

  • Connector C-25
  • Wiring harness between branch A and connector C-25
  • Wiring harness between connector C-25 and branch B

F

  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 branch B
  • Audio amplifier malfunction

System wiring diagram

ac9wzw00002666

  Inspection item

  • Audio amplifier power supply voltage-related wiring harness and fuse
  • Audio amplifier body ground related wiring harness
  • Audio amplifier connector
  • Wiring harness between audio amplifier terminal 3O and branch B
  • Wiring harness between audio amplifier terminal 3P and branch B
  • Audio amplifier

G

  Possible cause

  • Connector terminal disconnection, poor contact, damage, deformation, corrosion
  • Open circuit in wiring harness between branch B and connector C-11
  • Open circuit in wiring harness between connector C-11 and connector C-37
  • Connector C-11 malfunction
  • Connector C-37 malfunction

System wiring diagram

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  Inspection item

  • Connector C-11
  • Connector C-37
  • Wiring harness between branch B and connector C-11
  • Wiring harness between connector C-11 and connector C-37

H

  With Bose®
  Possible cause
    • Connector terminal disconnection, poor contact, damage, deformation, corrosion
    • Information display power supply voltage or body ground malfunction
    • Open circuit in wiring harness between connector C-37 and information display
    • Connector C-37 malfunction
    • Information display malfunction
  System wiring diagram

    ac9wzw00002668

  Inspection item
    • Information display power supply voltage-related wiring harness and fuse
    • Information display body ground related wiring harness
    • Information display connector
    • Connector C-37
    • Wiring harness between connector C-37 and information display
    • Information display

  Without Bose®
  Possible cause
    • Connector terminal disconnection, poor contact, damage, deformation, corrosion
    • Information display power supply voltage or body ground malfunction
    • Open circuit in wiring harness between branch A and information display
    • Information display malfunction
  System wiring diagram

    ac9wzw00002669

  Inspection item
    • Information display power supply voltage-related wiring harness and fuse
    • Information display body ground related wiring harness
    • Information display connector
    • Wiring harness between branch A and information display
    • Information display

Type B (Blind Spot Monitoring (BSM) Control Module Connector 10-pin Type (WITH Bose®))

1. Verify DTCs of the modules related to the CAN system.

2. Apply the following items to the DTC Output Pattern and Malfunctioning Part, and then verify the reference to the malfunctioning location. (See DTC Output Pattern and Malfunctioning Part.)

  • Communication error DTCs
  • Malfunctioning module

  Note
  • A hyphen(-) in the DTC output pattern cell indicates that the DTC may be displayed depending on the malfunction detection conditions. If it is not displayed, the malfunctioning part can be determined by checking only the crosses (×).

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

4. Perform the DTC inspection after the repair procedure.

  • If any DTC is displayed, return to FOREWORD [MULTIPLEX COMMUNICATION SYSTEM (L.H.D.)]. (See FOREWORD [MULTIPLEX COMMUNICATION SYSTEM (L.H.D.)].)

DTC Output Pattern and Malfunctioning Part

Cross (×): Displayed
Hyphen (-): May or may not be displayed

DTC display | DTC display pattern
--- | ---
DTC output module | DTC | I | J | K | L | M | N | O | P
IC (Instrument cluster) | U0200 |  |  |  |  |  | × |  |
BSML (BSM control module (LH)) | U0100:00 | × |  | × |  | × |  |  |
U0140:00 | × |  | × |  | × |  |  |
Information display*7 | 02:1E*1 |  | × | × |  | × |  | × | ×
02:3E*1 | × |  | × |  | × |  | × | ×
Information display*8 | 02 1E*1 |  | × | × |  | × |  | × | ×
02 3E*1 | × |  | × |  | × |  | × | ×
M-MDS display module | “Fail” display pattern
IC*3 | × |  | × |  | × |  | × |
ACU*4 |  | × | × |  | × |  | × |
AM*5 |  |  |  | × | × |  | × |
BSML*6 |  |  |  |  |  | × | × |
Information display | Display pattern on information display
02:1-*2 |  | - | - |  | - |  | - | -

*1 :The DTC is displayed on the information display.
*2 :If "02:1-" is displayed on the information display, no DTC is displayed.
*3 :Instrument cluster
*4 :Audio unit
*5 :Audio amplifier
*6 :BSM control module (LH)
*7 :With clock display
*8 :Without clock display

I

  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 branch A
  • Instrument cluster malfunction

System wiring diagram

ac9wzw00003136

  Inspection item

  • Instrument cluster power supply voltage-related wiring harness and fuse
  • Instrument cluster body ground related wiring harness
  • Instrument cluster connector
  • Wiring harness between instrument cluster terminal 1T and branch A
  • Wiring harness between instrument cluster terminal 1S and branch A
  • Instrument cluster

J

  Possible cause

  • Connector terminal disconnection, poor contact, damage, deformation, corrosion
  • Audio unit power supply voltage or body ground malfunction
  • Open circuit in wiring harness between audio unit and branch A
  • Audio unit malfunction

System wiring diagram

ac9wzw00003137

  Inspection item

  • Audio unit power supply voltage-related wiring harness and fuse
  • Audio unit body ground related wiring harness
  • Audio unit connector
  • Wiring harness between audio unit terminal 1O and branch A
  • Wiring harness between audio unit terminal 1Q and branch A
  • Audio unit

K

  Possible cause

  • Connector terminal disconnection, poor contact, damage, deformation, corrosion
  • Open circuit in wiring harness between branch A and connector C-25
  • Open circuit in wiring harness between connector C-25 and branch B
  • Connector C-25 malfunction

System wiring diagram

ac9wzw00003138

  Inspection item

  • Connector C-25
  • Wiring harness between branch A and connector C-25
  • Wiring harness between connector C-25 and branch B

L

  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 branch B
  • Audio amplifier malfunction

System wiring diagram

ac9wzw00003139

  Inspection item

  • Audio amplifier power supply voltage-related wiring harness and fuse
  • Audio amplifier body ground related wiring harness
  • Audio amplifier connector
  • Wiring harness between audio amplifier terminal 3O and branch B
  • Wiring harness between audio amplifier terminal 3P and branch B
  • Audio amplifier

M

  Possible cause

  • Connector terminal disconnection, poor contact, damage, deformation, corrosion
  • Open circuit in wiring harness between branch B and connector C-23
  • Open circuit in wiring harness between connector C-23 and connector C-43
  • Connector C-23 malfunction
  • Connector C-43 malfunction

System wiring diagram

ac9wzw00003140

  Inspection item

  • Connector C-23
  • Connector C-43
  • Wiring harness between branch B and connector C-23
  • Wiring harness between connector C-23 and connector C-43

N

  Possible cause

  • Connector terminal disconnection, poor contact, damage, deformation, corrosion
  • BSM control module (LH) power supply voltage or body ground malfunction
  • Open circuit in wiring harness between BSM control module (LH) and connector C-43
  • Connector C-43 malfunction
  • BSM control module (LH) malfunction

System wiring diagram

ac9wzw00003141

  Inspection item

  • BSM control module (LH) power supply voltage-related wiring harness and fuse
  • BSM control module (LH) body ground related wiring harness
  • BSM control module (LH) connector
  • Wiring harness between BSM control module (LH) terminal C and connector C-43
  • Wiring harness between BSM control module (LH) terminal D and connector C-43
  • BSM control module (LH)

O

  Possible cause

  • Connector terminal disconnection, poor contact, damage, deformation, corrosion
  • Open circuit in wiring harness between connector C-43 and connector C-23
  • Open circuit in wiring harness between connector C-23 and connector C-11
  • Open circuit in wiring harness between connector C-11 and connector C-37
  • Connector C-43 malfunction
  • Connector C-23 malfunction
  • Connector C-11 malfunction
  • Connector C-37 malfunction

System wiring diagram

ac9wzw00003142

  Inspection item

  • Connector C-43
  • Connector C-23
  • Connector C-11
  • Connector C-37
  • Wiring harness between connector C-43 and connector C-23
  • Wiring harness between connector C-23 and connector C-11
  • Wiring harness between connector C-11 and connector C-37

P

  Possible cause

  • Connector terminal disconnection, poor contact, damage, deformation, corrosion
  • Information display power supply voltage or body ground malfunction
  • Open circuit in wiring harness between connector C-37 and information display
  • Connector C-37 malfunction
  • Information display malfunction

System wiring diagram

ac9wzw00003143

  Inspection item

  • Information display power supply voltage-related wiring harness and fuse
  • Information display body ground related wiring harness
  • Connector C-37
  • Information display connector
  • Wiring harness between information display terminal J and connector C-37
  • Wiring harness between information display terminal L and connector C-37
  • Information display

Type B (Blind Spot Monitoring (BSM) Control Module Connector 10-pin Type (WITHOUT Bose®))

1. Verify DTCs of the modules related to the CAN system.

2. Apply the following items to the DTC Output Pattern and Malfunctioning Part, and then verify the reference to the malfunctioning location. (See DTC Output Pattern and Malfunctioning Part.)

  • Communication error DTCs
  • Malfunctioning module

  Note
  • A hyphen(-) in the DTC output pattern cell indicates that the DTC may be displayed depending on the malfunction detection conditions. If it is not displayed, the malfunctioning part can be determined by checking only the crosses (×).

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

4. Perform the DTC inspection after the repair procedure.

  • If any DTC is displayed, return to FOREWORD [MULTIPLEX COMMUNICATION SYSTEM (L.H.D.)]. (See FOREWORD [MULTIPLEX COMMUNICATION SYSTEM (L.H.D.)].)

DTC Output Pattern and Malfunctioning Part

Cross (×): Displayed
Hyphen (-): May or may not be displayed

DTC display | DTC display pattern
--- | ---
DTC output module | DTC | Q | R | S | T | U | V
IC (Instrument cluster) | U0200 |  |  |  | × |  |
BSML (BSM control module (LH)) | U0100:00 | × |  | × |  |  |
U0140:00 | × |  | × |  |  |
Information display*6 | 02:1E*1 |  | × | × |  | × | ×
02:3E*1 | × |  | × |  | × | ×
Information display*7 | 02 1E*1 |  | × | × |  | × | ×
02 3E*1 | × |  | × |  | × | ×
M-MDS display module | “Fail” display pattern
IC*3 | × |  | × |  | × |
ACU*4 |  | × | × |  | × |
BSML*5 |  |  |  | × | × |
Information display | Display pattern on information display
02:1-*2 |  | - | - |  | - | -

*1 :The DTC is displayed on the information display.
*2 :If "02:1-" is displayed on the information display, no DTC is displayed.
*3 :Instrument cluster
*4 :Audio unit
*5 :BSM control module (LH)
*6 :With clock display
*7 :Without clock display

Q

  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 branch A
  • Instrument cluster malfunction

System wiring diagram

ac9wzw00003144

  Inspection item

  • Instrument cluster power supply voltage-related wiring harness and fuse
  • Instrument cluster body ground related wiring harness
  • Instrument cluster connector
  • Wiring harness between instrument cluster terminal 1T and branch A
  • Wiring harness between instrument cluster terminal 1S and branch A
  • Instrument cluster

R

  Possible cause

  • Connector terminal disconnection, poor contact, damage, deformation, corrosion
  • Audio unit power supply voltage or body ground malfunction
  • Open circuit in wiring harness between audio unit and branch A
  • Audio unit malfunction

System wiring diagram

ac9wzw00003145

  Inspection item

  • Audio unit power supply voltage-related wiring harness and fuse
  • Audio unit body ground related wiring harness
  • Audio unit connector
  • Wiring harness between audio unit terminal 1O and branch A
  • Wiring harness between audio unit terminal 1Q and branch A
  • Audio unit

S

  With BSM system
  Possible cause
    • Connector terminal disconnection, poor contact, damage, deformation, corrosion
    • Open circuit in wiring harness between branch A and connector C-16
    • Open circuit in wiring harness between connector C-16 and connector C-21
    • Open circuit in wiring harness between connector C-21 and connector C-43
    • Connector C-16 malfunction
    • Connector C-21 malfunction
    • Connector C-43 malfunction
  System wiring diagram

    ac9wzw00003146

  Inspection item
    • Connector C-16
    • Connector C-21
    • Connector C-43
    • Wiring harness between connector C-16 and connector C-21
    • Wiring harness between connector C-21 and connector C-43

  Without BSM system
  Possible cause
    • Connector terminal disconnection, poor contact, damage, deformation, corrosion
    • Open circuit in wiring harness between branch A and connector C-37
    • Connector C-37 malfunction
  System wiring diagram

    ac9wzw00003147

  Inspection item
    • Connector C-37
    • Wiring harness between branch A and connector C-37

T

  Possible cause

  • Connector terminal disconnection, poor contact, damage, deformation, corrosion
  • BSM control module (LH) power supply voltage or body ground malfunction
  • Open circuit in wiring harness between BSM control module (LH) and connector C-43
  • Connector C-43 malfunction
  • BSM control module (LH) malfunction

System wiring diagram

ac9wzw00003148

  Inspection item

  • BSM control module (LH) power supply voltage-related wiring harness and fuse
  • BSM control module (LH) body ground related wiring harness
  • BSM control module (LH) connector
  • Connector C-43
  • Wiring harness between BSM control module (LH) terminal C and connector C-43
  • Wiring harness between BSM control module (LH) terminal D and connector C-43
  • BSM control module (LH)

U

  Possible cause

  • Connector terminal disconnection, poor contact, damage, deformation, corrosion
  • Open circuit in wiring harness between connector C-43 and connector C-21
  • Open circuit in wiring harness between connector C-21 and connector C-16
  • Open circuit in wiring harness between connector C-16 and connector C-37
  • Connector C-43 malfunction
  • Connector C-21 malfunction
  • Connector C-16 malfunction
  • Connector C-37 malfunction

System wiring diagram

ac9wzw00003149

  Inspection item

  • Connector C-43
  • Connector C-21
  • Connector C-16
  • Connector C-37
  • Wiring harness between connector C-43 and connector C-21
  • Wiring harness between connector C-21 and connector C-16
  • Wiring harness between connector C-16 and connector C-37

V

  Possible cause

  • Connector terminal disconnection, poor contact, damage, deformation, corrosion
  • Information display power supply voltage or body ground malfunction
  • Open circuit in wiring harness between information display and connector C-37
  • Connector C-37 malfunction
  • Information display malfunction

System wiring diagram

ac9wzw00003150

  Inspection item

  • Information display power supply voltage-related wiring harness and fuse
  • Information display body ground related wiring harness
  • Connector C-37
  • Information display connector
  • Wiring harness between information display terminal J and connector C-37
  • Wiring harness between information display terminal L and connector C-37
  • Information display