DETERMINING MALFUNCTIONING PART (MS-CAN) [MULTIPLEX COMMUNICATION SYSTEM (R.H.D. (EXCEPT MZR-CD 2.2, MZR 2.0 DISI))]
id0902l8846800
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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 the following for the modules related to the CAN system.
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• Communication error DTCs
• Malfunctioning module
• Display status of the air conditioner/audio control on the information display when the climate control unit, or either the audio unit/car-navigation unit is operated.
• The operation condition of the Bluetooth system.
2. Look for a DTC display pattern and system operation status in tandem which match.
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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. Refer to the matching tandem diagnostic results (A to F) and inspect the possible cause and inspection item.
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 operation
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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*2
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U015500HEC
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×
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×
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×
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U016400EATC
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×
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×
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U018400ACU
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×
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×
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ACU*1, *6
(Audio unit)
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U0155:00
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×
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×
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U0156:00
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U0197:00
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×
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×
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Car-navigation unit*3, *7
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Device code 17/error code 11
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×
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×
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EATC*1
(Climate control unit)
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U0155:00
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×
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×
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U0423:68
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-
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-
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IC*1
(Instrument cluster)
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U0164:00
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×
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M-MDS display module
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“Fail” display pattern
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ACU
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×
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EATC
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×
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IC
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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*4
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-
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-
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None EATC*5
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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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×
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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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×
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System operation
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System operation pattern
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Bluetooth system
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*
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*
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*
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Item
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Diagnostic result
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Possible cause and inspection item
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A
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B
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C
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D
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E
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F
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Reference page
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*1 :The DTC is displayed on M-MDS.
*2 :The DTC is displayed on the information display.
*3 :The DTC is displayed on the car-navigation unit.
*4 :If “None ACU” is displayed on the information display, no DTC is displayed.
*5 :If “None EATC” is displayed on the information display, no DTC is displayed.
*6 :With audio unit
*7 :With car-navigation unit
A
Possible cause
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• Connector terminal disconnection, poor contact, damage, deformation, corrosion
• Open circuit in wiring harness between information display and connector C-17
• Connector C-17 malfunction
• Information display malfunction
System wiring diagram
Inspection item
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• Information display connector
• Connector C-17
• Wiring harness between information display terminal J and connector C-17
• Wiring harness between information display terminal L and connector C-17
• Information display
B
Possible cause
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• Connector terminal disconnection, poor contact, damage, deformation, corrosion
• Open circuit in wiring harness between audio unit or car-navigation unit and connector C-17
• Connector C-17 malfunction
• Audio unit or car-navigation unit malfunction
System wiring diagram
Inspection item
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• Audio unit or car-navigation unit connector
• Connector C-17
• Wiring harness between audio unit or car-navigation unit terminal 1O and connector C-17
• Wiring harness between audio unit or car-navigation unit terminal 1Q and connector C-17
• Audio unit or car-navigation unit
C
Possible cause
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• Connector terminal disconnection, poor contact, damage, deformation, corrosion
• Open circuit in wiring harness between climate control unit and connector C-17
• Connector C-17 malfunction
• Climate control unit malfunction
System wiring diagram
Inspection item
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• Climate control unit connector
• Connector C-17
• Wiring harness between climate control unit terminal 1A and connector C-17
• Wiring harness between climate control unit terminal 1B and connector C-17
• Climate control unit
D
Possible cause
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• Connector terminal disconnection, poor contact, damage, deformation, corrosion
• Open circuit in wiring harness between connector C-17 and connector C-20
• Connector C-17 malfunction
• Connector C-20 malfunction
System wiring diagram
Inspection item
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• Connector C-17
• Connector C-20
• Wiring harness between connector C-17 and connector C-20
E
Possible cause
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• Connector terminal disconnection, poor contact, damage, deformation, corrosion
• Open circuit in wiring harness between Bluetooth unit and connector C-20
• Connector C-20 malfunction
• Bluetooth unit malfunction
System wiring diagram
Inspection item
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• Bluetooth unit connector
• Connector C-20
• Wiring harness between Bluetooth unit terminal Y and connector C-20
• Wiring harness between Bluetooth unit terminal Z and connector C-20
• Bluetooth unit
F
With Bluetooth 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 instrument cluster and connector C-20
• Connector C-20 malfunction
• Instrument cluster malfunction
System wiring diagram
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Inspection item
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• Instrument cluster connector
• Connector C-20
• Wiring harness between instrument cluster terminal 2T and connector C-20
• Wiring harness between instrument cluster terminal 2S and connector C-20
• Instrument cluster
Without Bluetooth 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 instrument cluster and connector C-17
• Connector C-17 malfunction
• Instrument cluster malfunction
System wiring diagram
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Inspection item
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• Instrument cluster connector
• Connector C-17
• Wiring harness between instrument cluster terminal 2T and connector C-17
• Wiring harness between instrument cluster terminal 2S and connector C-17
• Instrument cluster
