DETERMINING MALFUNCTIONING PART (MS-CAN) [MULTIPLEX COMMUNICATION SYSTEM (L.H.D. (EXCEPT MZR-CD 2.2, MZR 2.0 DISI i-stop))]
id0902k4846800
-
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 air conditioner/audio control on the multi information display/information display when the climate control unit, or either the audio unit is operated.
• The operation condition of the Bluetooth system (HF/TEL system).
-
Note
-
• 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.
-
DTC Output Pattern and Malfunctioning Part
Cross (×): Displayed
Hyphen (-): May or may not be displayed
Asterisk (*): No display or no operation
|
DTC display
|
DTC display pattern
|
|
DTC output module
|
DTC
|
|
|
|
|
|
|
|
Information display*2
|
U0164 EATC
|
|
|
|
|
×
|
|
|
U0181 HEC
|
|
|
|
|
|
×
|
|
U0184 ACU
|
|
|
|
×
|
|
|
|
MID*1
(Multi information display)
|
U0155
|
|
|
|
|
|
×
|
|
U0164
|
|
|
|
|
×
|
|
|
U0184
|
|
|
|
×
|
|
|
|
U0423
|
|
|
|
|
|
-
|
|
ACU*1
(Audio unit)
|
U0155:00
|
|
|
|
|
|
×
|
|
U0156:00
|
×
|
|
×
|
|
|
|
|
U0197:00
|
|
×
|
×
|
|
|
|
|
U0423:68
|
|
|
|
|
|
-
|
|
EATC*1
(Climate control unit)
|
U0155:00
|
|
|
|
|
|
×
|
|
U0156:00
|
×
|
|
×
|
|
|
|
|
U0423:68
|
|
|
|
|
|
-
|
|
IC*1
(Instrument cluster)
|
U0156:00
|
×
|
|
×
|
|
|
|
|
U0164:00
|
|
|
|
|
×
|
|
|
M-MDS display module
|
“Fail” display pattern
|
|
MID
|
×
|
|
×
|
|
|
|
|
ACU
|
|
|
|
×
|
|
|
|
EATC
|
|
|
|
|
×
|
|
|
IC
|
|
|
|
|
|
×
|
|
Information display display
|
Display pattern on information display
|
|
None ACU*3
|
|
|
|
-
|
|
|
|
None EATC*4
|
|
|
|
|
-
|
|
|
Audio control display
|
|
|
|
*
|
|
|
|
Air conditioning control display
|
|
|
|
|
*
|
|
|
System operation
|
System operation pattern
|
|
Bluetooth system (HF/TEL system)
|
|
*
|
*
|
*
|
|
|
*1 :The DTC is displayed on M-MDS.
*2 :The DTC is displayed on the information display.
*3 :If “None ACU” is displayed on the multi information display/information display, no DTC is displayed.
*4 :If “None EATC” is displayed on the multi information display/information display, no DTC is displayed.
A
Possible cause
-
• Connector terminal disconnection, poor contact, damage, deformation, corrosion
• Open circuit in wiring harness between multi information display/information display and connector C-11
• Open circuit in wiring harness between connector C-11 and connector C-17
• Open circuit in wiring harness between connector C-17 and connector C-17
• Open circuit in wiring harness between connector C-17 and connector C-49
• Connector C-11 malfunction
• Connector C-17 malfunction
• Connector C-49 malfunction
• Multi information display/information display malfunction
System wiring diagram
Inspection item
-
• Multi information display/information display connector
• Connector C-11
• Connector C-17
• Connector C-49
• Wiring harness between multi information display/information display terminal 1V and connector C-11
• Wiring harness between multi information display/information display terminal 1X and connector C-11
• Wiring harness between connector C-11 and connector C-17
• Wiring harness between connector C-17 and connector C-17
• Wiring harness between connector C-17 and connector C-49
• Multi information display/information display
B
Possible cause
-
• Connector terminal disconnection, poor contact, damage, deformation, corrosion
• Open circuit in wiring harness between Bluetooth unit and connector C-49
• Connector C-49 malfunction
• Bluetooth unit malfunction
System wiring diagram
Inspection item
-
• Bluetooth unit connector
• Connector C-49
• Wiring harness between Bluetooth unit terminal Y and connector C-49
• Wiring harness between Bluetooth unit terminal Z and connector C-49
• Bluetooth unit
C
Possible cause
-
• Connector terminal disconnection, poor contact, damage, deformation, corrosion
• Open circuit in wiring harness between connector C-49 and connector C-46
• Connector C-49 malfunction
• Connector C-46 malfunction
System wiring diagram
Inspection item
-
• Connector C-49
• Connector C-46
• Wiring harness between connector C-49 and connector C-46
D
Possible cause
-
• Connector terminal disconnection, poor contact, damage, deformation, corrosion
• Open circuit in wiring harness between audio unit and connector C-46
• Connector C-46 malfunction
• Audio unit malfunction
System wiring diagram
Inspection item
-
• Audio unit connector
• Connector C-46
• Wiring harness between audio unit terminal 1O and connector C-46
• Wiring harness between audio unit terminal 1Q and connector C-46
• Audio unit
E
Possible cause
-
• Connector terminal disconnection, poor contact, damage, deformation, corrosion
• Open circuit in wiring harness between climate control unit and connector C-46
• Connector C-46 malfunction
• Climate control unit malfunction
System wiring diagram
Inspection item
-
• Climate control unit connector
• Connector C-46
• Wiring harness between climate control unit terminal 2E and connector C-46
• Wiring harness between climate control unit terminal 2G and connector C-46
• Climate control unit
F
Possible cause
-
• Connector terminal disconnection, poor contact, damage, deformation, corrosion
• Open circuit in wiring harness between instrument cluster and connector C-46
• Connector C-46 malfunction
• Instrument cluster malfunction
System wiring diagram
Inspection item
-
• Instrument cluster connector
• Connector C-46
• Wiring harness between instrument cluster terminal 2C and connector C-46
• Wiring harness between instrument cluster terminal 2E and connector C-46
• Instrument cluster
