DETERMINING MALFUNCTIONING PART (MS-CAN) [MULTIPLEX COMMUNICATION SYSTEM (L.H.D.)]
id0902j3846800
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Caution
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• 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.
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• Communication error DTCs
• Malfunctioning module
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Note
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• 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.
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DTC Output Pattern and Malfunctioning Part
Cross (×): Displayed
Hyphen (-): May or may not be displayed
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DTC display
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DTC display pattern
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DTC output module
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DTC
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Information display*1,*4
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U0181 HEC
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×
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×
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U0184 ACU
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×
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×
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Information display*2, *4
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02:3E
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×
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×
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02:1E
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×
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×
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×
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ACU*2, *3
(Audio unit)
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U0156:00
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×
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M-MDS display module
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“Fail” display pattern
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ACU*2
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×
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×
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AM
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×
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×
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IC
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×
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Information display display
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Display pattern on information display
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None ACU*1, *5
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-
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-
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-
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02:1-*2, *6
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-
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*1 :Without display (audio unit).
*2 :With display (audio unit).
*3 :The DTC is displayed on M-MDS.
*4 :The DTC is displayed on the information display.
*5 :If “None ACU” is displayed on the information display, no DTC is displayed.
*6 :If “02:1-” is displayed on the information display, no DTC is displayed.
A
Possible cause
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• 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
Inspection item
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• 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
B
Possible cause
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• Connector terminal disconnection, poor contact, damage, deformation, corrosion
• Open circuit in wiring harness between audio unit and connector C-37
• Audio unit malfunction
• Connector C-37 malfunction
System wiring diagram
Inspection item
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• Audio unit connector
• Connector C-37
• Wiring harness between audio unit terminal 1O and connector C-37
• Wiring harness between audio unit terminal 1Q and connector C-37
• Audio unit
C
Possible cause
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• Connector terminal disconnection, poor contact, damage, deformation, corrosion
• Open circuit in wiring harness between audio amplifier and branch A
• Audio amplifier malfunction
System wiring diagram
Inspection item
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• Audio amplifier connector
• Wiring harness between audio amplifier terminal 2O and branch A
• Wiring harness between audio amplifier terminal 2P and branch A
• Audio amplifier
D
Possible cause
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• 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-37
• Connector C-25 malfunction
• Connector C-37 malfunction
System wiring diagram
Inspection item
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• Connector C25
• Connector C37
• Wiring harness between branch A and connector C-25
• Wiring harness between connector C-25 and connector C-37
• Connector C-37
E
Possible cause
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• Connector terminal disconnection, poor contact, damage, deformation, corrosion
• Open circuit in wiring harness between connector C-37 and instrument cluster
• Instrument cluster malfunction
• Connector C-37 malfunction
System wiring diagram
Inspection item
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• Instrument cluster connector
• Connector C-37
• Wiring harness between instrument cluster terminal 1T and connector C-37
• Wiring harness between instrument cluster terminal 1S and connector C-37
• Instrument cluster
F
Possible cause
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• Connector terminal disconnection, poor contact, damage, deformation, corrosion
• Open circuit in wiring harness between connector C-37 and instrument cluster
• Instrument cluster malfunction
• Connector C-37 malfunction
System wiring diagram
Inspection item
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• Instrument cluster connector
• Connector C-37
• Wiring harness between instrument cluster terminal 1T and connector C-37
• Wiring harness between instrument cluster terminal 1S and connector C-37
• Instrument cluster
G
Possible cause
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• Connector terminal disconnection, poor contact, damage, deformation, corrosion
• Open circuit in wiring harness between connector C-37 and information display
• Connector C-37 malfunction
• Information display malfunction
System wiring diagram
Inspection item
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• 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
• Connector C-37
H
Possible cause
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• Connector terminal disconnection, poor contact, damage, deformation, corrosion
• Open circuit in wiring harness between connector C-37 and information display
• Connector C-37 malfunction
• Information display malfunction
System wiring diagram
Inspection item
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• 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
• Connector C-37
