Component Tests and General Diagnostics
DETERMINING MALFUNCTIONING PART (HS-CAN) [MULTIPLEX COMMUNICATION SYSTEM]
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 the CAN system-related module DTCs and the failed module using the M-MDS.
2. Look for a DTC display pattern and failed module display pattern in tandem which match.
NOTE:
- A hyphen (-) in the DTC output pattern table indicates that the DTC may be displayed depending on the malfunction detection conditions. If only an (x) is indicated, it means the DTC will not be displayed.
- If any of the following DTCs is displayed alone, perform the applicable DTC inspection. Multiplex Communication System - DTC Table
- DSC HU/CM: U0401:68, U0452:86
- BCM: U0415:68
- EPS control module: U0401:00
- Instrument cluster: U0100:87, U0401:68, U0401:92, U0402:92, U0415:92, U0420:92, U0452:68, U0452:92, U2005:86
3. Refer to the matching tandem diagnostic results (A to I) 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.
Diagnostic Table for Determining Malfunctioning Part
Cross (x): Displayed Hyphen (-): May or may not be displayed
A
Possible cause
- Connector terminal disconnection, poor contact, damage, deformation, corrosion
- Open circuit in wiring harness between PCM and branch A
- PCM malfunction
System wiring diagram
Inspection item
- PCM connector
- Wiring harness between PCM terminal 1AE and branch A
- Wiring harness between PCM terminal 1AI and branch A
- PCM
B
Possible cause
- Connector terminal disconnection, poor contact, damage, deformation, corrosion
- Open circuit in wiring harness between DSC HU/CM and branch A
- DSC HU/CM malfunction
System wiring diagram
Inspection item
- DSC HU/CM connector
- Wiring harness between DSC HU/CM terminal M and branch A
- Wiring harness between DSC HU/CM terminal J and branch A
- DSC HU/CM
C
Possible cause
- Connector terminal disconnection, poor contact, damage, deformation, corrosion
- Open circuit in wiring harness between branch A and connector C-03
- Open circuit in wiring harness between connector C-03 and branch B
- Connector C-03 malfunction
System wiring diagram
Inspection item
- Connector C-03
- Wiring harness between branch A and connector C-03
- Wiring harness between connector C-03 and branch B
D
Possible cause
- Connector terminal disconnection, poor contact, damage, deformation, corrosion
- Open circuit in wiring harness SAS control module and branch B
- SAS control module malfunction
System wiring diagram
Inspection item
- SAS control module connector
- Wiring harness between SAS control module terminal 3C and branch B
- Wiring harness between SAS control module terminal 3D and branch B
- SAS control module
E
Possible cause
- Connector terminal disconnection, poor contact, damage, deformation, corrosion
- Open circuit in wiring harness between BCM and branch B
System wiring diagram
Inspection item
- BCM connector
- Wiring harness between BCM terminal 7X and branch B
- Wiring harness between BCM terminal 7V and branch B
F
Possible cause
- Connector terminal disconnection, poor contact, damage, deformation, corrosion
- BCM malfunction
System wiring diagram
Inspection item
- BCM
G
Possible cause
- Connector terminal disconnection, poor contact, damage, deformation, corrosion
- Open circuit in wiring harness BCM and branch C
System wiring diagram
Inspection item
- BCM connector
- Wiring harness between BCM terminal 6X and branch C
- Wiring harness between BCM terminal 6V and branch C
H
Possible cause
- Connector terminal disconnection, poor contact, damage, deformation, corrosion
- Open circuit in wiring harness between EPS control module and branch C
- EPS control module malfunction
System wiring diagram
Inspection item
- EPS control module connector
- Wiring harness between EPS control module terminal 1G and branch C
- Wiring harness between EPS control module terminal 1H and branch C
- EPS control module
I
Possible cause
- Connector terminal disconnection, poor contact, damage, deformation, corrosion
- Open circuit in wiring harness instrument cluster and branch C
- Instrument cluster malfunction
System wiring diagram
Inspection item
- Instrument cluster connector
- Wiring harness between instrument cluster terminal 2B and branch C
- Wiring harness between instrument cluster terminal 2D and branch C
- Instrument cluster