Determining Open Circuit Location
DETERMINING OPEN CIRCUIT LOCATION (MS-CAN) [MULTIPLEX COMMUNICATION SYSTEM]
CAUTION:
- First perform the following malfunction diagnosis according to the Initial Inspection and Diagnostic Overview troubleshooting procedure.
- 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. Refer to DTC output pattern and malfunctioning location for the following and select the link for the malfunctioning location.
- Communication error DTCs
- Malfunctioning module
NOTE:
- A " - " in the DTC output pattern cell indicates that the DTC may or may not be displayed depending on the malfunction detection conditions.
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.
- If any DTC is displayed, return to Initial Inspection and Diagnostic Overview.
DTC output pattern and malfunctioning location
Cross (x): Communication error-related DTC and failed module Hyphen (-): Error signal-related DTC may be indicated
*1
The DTC is displayed on M-MDS.
*2
The DTC is displayed on the information display.
A
Possible cause
- Connector terminal disconnection, poor contact, damage, deformation, corrosion
- Open circuit in wiring harness between instrument cluster and connector C-45
- Connector C-45 malfunction
- Instrument cluster malfunction
System wiring diagram
Inspection item
- Instrument cluster connector
- Connector C-45
- Wiring harness between instrument cluster terminal C and connector C-45
- Wiring harness between instrument cluster terminal E and connector C-45
- Instrument cluster
B
Possible cause
- Connector terminal disconnection, poor contact, damage, deformation, corrosion
- Open circuit in wiring harness between climate control unit and connector C-45
- Connector C-45 malfunction
- Climate control unit malfunction
System wiring diagram
Inspection item
- Climate control unit connector
- Connector C-45
- Wiring harness between climate control unit terminal 1W and connector C-45
- Wiring harness between climate control unit terminal 1X and connector C-45
- Climate control unit
C
Possible cause
- Connector terminal disconnection, poor contact, damage, deformation, corrosion
- Open circuit in wiring harness between audio unit and connector C-45
- Connector C-45 malfunction
- Audio unit malfunction
System wiring diagram
Inspection item
- Audio unit connector
- Connector C-45
- Wiring harness between audio unit terminal 1O and connector C-45
- Wiring harness between audio unit terminal 1Q and connector C-45
- Audio unit
D
Possible cause
- Connector terminal disconnection, poor contact, damage, deformation, corrosion
- Open circuit in wiring harness between SIRIUS satellite radio unit and connector C-45
- Connector C-45 malfunction
- SIRIUS satellite radio unit malfunction
System wiring diagram
Inspection item
- SIRIUS satellite radio unit connector
- Connector C-45
- Wiring harness between SIRIUS satellite radio unit terminal L and connector C-45
- Wiring harness between SIRIUS satellite radio unit terminal K and connector C-45
- SIRIUS satellite radio unit
E
Possible cause
- Connector terminal disconnection, poor contact, damage, deformation, corrosion
- Open circuit in wiring harness between Bluetooth unit and connector C-45
- Connector C-45 malfunction
- Bluetooth unit malfunction
System wiring diagram
Inspection item
- Bluetooth unit connector
- Connector C-45
- Wiring harness between Bluetooth unit terminal Y and connector C-45
- Wiring harness between Bluetooth unit terminal Z and connector C-45
- Bluetooth unit
F
Possible cause
- Connector terminal disconnection, poor contact, damage, deformation, corrosion
- Open circuit in wiring harness between information display and connector C-45
- Connector C-45 malfunction
- Information display malfunction
System wiring diagram
Inspection item
- Information display connector
- Connector C-45
- Wiring harness between information display terminal J and connector C-45
- Wiring harness between information display terminal L and connector C-45
- Information display