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 the malfunctioning location, and then verify the reference to the malfunctioning location.
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• Communication error DTCs
• Display status of the air conditioner/audio control on the information display when the climate control unit, or either the audio unit or the car-navigation unit is operated.
• The operation condition of the hands-free telephone system.
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Note
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• A hyphen (-) in the DTC output pattern cell indicates that the DTC may or may not be displayed depending on the malfunction detection conditions. If it is not displayed, the malfunctioning location can be determined by checking the crosses (×) and asterisks (*).
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
Asterisk (*): No display or no operation
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DTC display
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DTC output pattern and malfunctioning location
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DTC output module
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DTC
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Information display
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U0164
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×
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×
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×
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U0184
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×
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×
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Audio (without car-navigation system)
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16:Er12
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-
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Car-navigation unit (without car-navigation system)
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Device code 16/error code 12
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-
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Device code 17/error code 11
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-
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Hands-free telephone unit (with audio unit)
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26:Er81
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-
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×
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×
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Hands-free telephone unit (with car-navigation unit)
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Device code 26/error code 81
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-
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×
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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
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-
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-
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None EATC*2
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-
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-
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Audio control display
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*
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*
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Air conditioning control display
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*
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*
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*
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System operation
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System operation pattern
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Hands-free telephone system
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*
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*
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*
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*1 :If “None ACU” is displayed on the information display, no DTC is displayed.
*2 :If “None EATC” 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 information display and branch A
• Information display malfunction
System wiring diagram
Inspection item
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• Information display connector
• Wiring harness between information display terminal J and branch A
• Wiring harness between information display terminal L and branch A
• Information display
B
Possible cause
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• Connector terminal disconnection, poor contact, damage, deformation, corrosion
• Open circuit in wiring harness between car-navigation unit or audio unit and branch A
• Car-navigation unit or audio unit malfunction
System wiring diagram
Inspection item
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• Car-navigation unit or audio unit connector
• Wiring harness between car-navigation unit or audio unit terminal 1O and branch A
• Wiring harness between car-navigation unit or audio unit terminal 1Q and branch B
• Car-navigation unit or audio unit
C
Possible cause
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• Connector terminal disconnection, poor contact, damage, deformation, corrosion
• Open circuit in wiring harness between branch A and connector X-09
• Open circuit in wiring harness between connector X-09 and branch B
• Connector X-09 malfunction
System wiring diagram
Inspection item
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• Wiring harness between branch A and connector X-09
• Wiring harness between connector X-09 and branch B
• Connector X-09
D
Possible cause
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• Connector terminal disconnection, poor contact, damage, deformation, corrosion
• Open circuit in wiring harness between hands-free telephone unit and branch B
• Hands-free telephone unit malfunction
System wiring diagram
Inspection item
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• Hands-free telephone unit connector
• Wiring harness between hands-free telephone unit terminal Q and branch B
• Wiring harness between hands-free telephone unit terminal R and branch B
• Hands-free telephone unit
E
Without hands-free telephone system
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Possible cause
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• Connector terminal disconnection, poor contact, damage, deformation, corrosion
• Open circuit in wiring harness between climate control unit and branch A
• Climate control unit malfunction
System wiring diagram
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Inspection item
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• Climate control unit connector
• Wiring harness between climate control unit terminal J and branch A
• Wiring harness between climate control unit terminal L and branch A
• Climate control unit
With hands-free telephone system
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Possible cause
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• Connector terminal disconnection, poor contact, damage, deformation, corrosion
• Open circuit in wiring harness between branch A and connector X-09
• Open circuit in wiring harness between connector X-09 and branch B
• Open circuit in wiring harness between climate control unit and connector X-09
• Climate control unit malfunction
System wiring diagram
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Inspection item
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• Climate control unit connector
• Wiring harness between branch A and connector X-09
• Wiring harness between connector X-09 and branch B
• Wiring harness between climate control unit terminal J and connector X-09
• Wiring harness between climate control unit terminal L and connector X-09
• Climate control unit
