DTC C2543: Error Passive
DTC detecting condition:
When send/receive failure of CAN communication is detected after the ignition switch is ON.
Trouble symptom:
- The steering wheel operation feels heavy.
- EyeSight steering support function does not operate. (Models with EyeSight)
Wiring diagram:
Electric power steering system Ref. to WIRING SYSTEM>ELECTRIC POWER STEERING SYSTEM .
- CHECK PERIPHERALS.
Check the data link connector.
Is any other electrical part connected to the data link connector or harness?
Yes: Disconnect the connection of electrical parts and perform inspection again.
No: Go to 2.
- CHECK LAN SYSTEM.
Perform the diagnosis for LAN system using the Subaru Select Monitor. Ref. to LAN SYSTEM (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE .
Is a DTC related to CAN communication detected?
Yes: Perform the diagnosis according to the DTC. Ref. to LAN SYSTEM (DIAGNOSTICS)>LIST OF DIAGNOSTIC TROUBLE CODE (DTC) .
No: Go to 3.
- CHECK DTC.
Read the DTC of the power steering control module using the Subaru Select Monitor. Ref. to POWER ASSISTED SYSTEM (POWER STEERING) (DIAGNOSTICS)>READ DIAGNOSTIC TROUBLE CODE (DTC) .
Is DTC C2543 a current malfunction?
Yes: Go to 4.
No: System is normal. Temporary interference from noise is a possible cause.
- CHECK CONNECTOR.
Check the connecting condition of connector.
Is the connector firmly installed?
Yes: Go to 5.
No: Install the connector, and check again.
- CHECK CONNECTOR.
- Turn the ignition switch to OFF.
- Disconnect the connector (B204).
Is there crimped or spread portion in connector terminal on vehicle harness side and power steering control module side?
Yes: Repair or replace faulty parts.
No: Go to 6.
- CHECK HARNESS.
Check the harness related to CAN communication system.
Is there any fault in the harness?
Yes: Repair or replace the harness.
No: Replace the steering gearbox. Ref. to POWER ASSISTED SYSTEM (POWER STEERING)>ELECTRIC POWER STEERING GEARBOX .