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

id0902j4846800


Vehicles Without Car-navigation System

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.

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.

•  Communication error DTCs
•  Malfunctioning module
•  Display status of the audio control on the information display when the audio unit is operated.
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 (R.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*1
02:3E
 
 
 
 
×
×
×
×
02:1E
×
×
 
×
 
 
×
×
Audio unit*2
U0156:00
 
 
 
 
 
 
 
×
M-MDS display module
“Fail” display pattern
ACU
 
×
 
×
 
 
 
 
AM
 
 
×
×
 
 
 
 
IC
 
 
 
 
 
×
 
 
Information display display
Display pattern on information display
02:1-*3
-
-
 
-
 
 
-
-

*1  :The DTC is displayed on the information display.
*2  :The DTC is displayed on M-MDS.
*3  :If “02:1-” is displayed on the information display, no DTC is displayed.


A

Possible cause
•  Connector terminal disconnection, poor contact, damage, deformation, corrosion
•  Open circuit in wiring harness between audio unit and connector C-38
•  Connector C-38 malfunction
•  Audio unit malfunction

System wiring diagram

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Inspection item
•  Audio unit connector
•  Connector C-38
•  Wiring harness between audio unit terminal 1O and connector C-38
•  Wiring harness between audio unit terminal 1Q and connector C-38
•  Audio unit


B

Possible cause
•  Connector terminal disconnection, poor contact, damage, deformation, corrosion
•  Open circuit in wiring harness between audio unit and connector C-11
•  Open circuit in wiring harness between connector C-11 and branch A
•  Connector C-11 malfunction
•  Audio unit malfunction

System wiring diagram

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Inspection item
•  Audio unit connector
•  Connector C-11
•  Wiring harness between audio unit terminal 1O and connector C-11
•  Wiring harness between audio unit terminal 1Q and connector C-11
•  Wiring harness between connector C-11 and branch A
•  Audio unit


C

Possible cause
•  Connector terminal disconnection, poor contact, damage, deformation, corrosion
•  Open circuit in wiring harness between branch A and audio amplifier
•  Audio amplifier malfunction

System wiring diagram

ac9wzw00001851
Inspection item
•  Audio amplifier connector
•  Wiring harness between audio amplifier terminal 3O and branch A
•  Wiring harness between audio amplifier terminal 3P and branch A
•  Audio amplifier


D

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 connector C-38
•  Connector C-25 malfunction
•  Connector C-38 malfunction

System wiring diagram

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Inspection item
•  Connector C-25
•  Connector C-38
•  Wiring harness between branch A and Connector C-25
•  Wiring harness between Connector C-25 and Connector C-38


E

Possible cause
•  Connector terminal disconnection, poor contact, damage, deformation, corrosion
•  Open circuit in wiring harness between instrument cluster and connector C-38
•  Connector C-38 malfunction
•  Instrument cluster malfunction

System wiring diagram

ac9wzw00001436
Inspection item
•  Instrument cluster connector
•  Connector C-38
•  Wiring harness between instrument cluster terminal 1T and connector C-38
•  Wiring harness between instrument cluster terminal 1S and connector C-38
•  Instrument cluster


F

Possible cause
•  Connector terminal disconnection, poor contact, damage, deformation, corrosion
•  Open circuit in wiring harness between instrument cluster and connector C-38
•  Connector C-38 malfunction
•  Instrument cluster malfunction

System wiring diagram

ac9wzw00001437
Inspection item
•  Instrument cluster connector
•  Connector C-38
•  Wiring harness between instrument cluster terminal 1T and connector C-38
•  Wiring harness between instrument cluster terminal 1S and connector C-38
•  Instrument cluster


G

Possible cause
•  Connector terminal disconnection, poor contact, damage, deformation, corrosion
•  Open circuit in wiring harness between information display and connector C-38
•  Connector C-38 malfunction
•  Information display malfunction

System wiring diagram

ac9wzw00001438
Inspection item
•  Information display connector
•  Connector C-38
•  Wiring harness between information display terminal J and connector C-38
•  Wiring harness between information display terminal L and connector C-38
•  Information display


H

Possible cause
•  Connector terminal disconnection, poor contact, damage, deformation, corrosion
•  Open circuit in wiring harness between information display and connector C-38
•  Connector C-38 malfunction
•  Information display malfunction

System wiring diagram

ac9wzw00001439
Inspection item
•  Information display connector
•  Connector C-38
•  Wiring harness between information display terminal J and connector C-38
•  Wiring harness between information display terminal L and connector C-38
•  Information display


Vehicles With Car-navigation System

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.

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.

•  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 (R.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
Information display*1
U0181 HEC
 
 
 
×
×
U0184 ACU
×
 
×
 
×
Car-navigation unit*2
Device code 17, error code 11
×
 
×
×
 
Device code 23, error code 11
 
×
×
 
 
M-MDS display module
“Fail” display pattern
AM
 
×
×
 
 
IC
 
 
 
×
 
Information display display
Display pattern on information display
None ACU*3
-
 
-
 
-

*1  :The DTC is displayed on the information display.
*2  :The DTC is displayed on the car-navigation unit.
*3  :If “None ACU” is displayed on the information display, no DTC is displayed.


A

Possible cause
•  Connector terminal disconnection, poor contact, damage, deformation, corrosion
•  Connector C-11 malfunction
•  Open circuit in wiring harness between car-navigation unit and branch A
•  Open circuit in wiring harness between branch A and connector C-11
•  Open circuit in wiring harness between connector C-11 and branch B
•  Car-navigation unit malfunction

System wiring diagram

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Inspection item
•  Car-navigation unit connector
•  Connector C-11
•  Wiring harness between car-navigation unit terminal 1O and branch A
•  Wiring harness between car-navigation unit terminal 1Q and branch A
•  Wiring harness between branch A and connector C-11
•  Wiring harness between connector C-11 and branch B
•  Car-navigation unit


B

Possible cause
•  Connector terminal disconnection, poor contact, damage, deformation, corrosion
•  Open circuit in wiring harness between branch A and audio amplifier
•  Audio amplifier malfunction

System wiring diagram

ac9wzw00001854
Inspection item
•  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


C

Possible cause
•  Connector terminal disconnection, poor contact, damage, deformation, corrosion
•  Open circuit in wiring harness between branch B and connector C-25
•  Open circuit in wiring harness between connector C-25 and connector C-38
•  Connector C-25 malfunction
•  Connector C-38 malfunction

System wiring diagram

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Inspection item
•  Connector C-25
•  Connector C-38
•  Wiring harness between branch B and Connector C-25
•  Wiring harness between Connector C-25 and Connector C-38


D

Possible cause
•  Connector terminal disconnection, poor contact, damage, deformation, corrosion
•  Open circuit in wiring harness between instrument cluster and connector C-38
•  Connector C-38 malfunction
•  Instrument cluster malfunction

System wiring diagram

ac9wzw00001441
Inspection item
•  Instrument cluster connector
•  Connector C-38
•  Wiring harness between instrument cluster terminal 1T and connector C-38
•  Wiring harness between instrument cluster terminal 1S and connector C-38
•  Instrument cluster


E

Possible cause
•  Connector terminal disconnection, poor contact, damage, deformation, corrosion
•  Open circuit in wiring harness between information display and connector C-38
•  Connector C-38 malfunction
•  Information display malfunction

System wiring diagram

ac9wzw00001442
Inspection item
•  Information display connector
•  Connector C-38
•  Wiring harness between information display terminal J and connector C-38
•  Wiring harness between information display terminal L and connector C-38
•  Information display