U1A05

U1A05 TCU

DTC Logic








Diagnosis Procedure


1. CHECK USB HARNESS CONTINUITY

1.Turn the power switch OFF.
2.Disconnect TCU and AV control unit connectors.
3.Check the continuity between TCU vehicle-side harness connector and TCU vehicle-side harness connector.





4.Check the continuity between TCU vehicle-side harness connector and ground.





Is the check result normal?
YES- Replace TCU. Refer to "Removal and Installation" Telematics System.
NO- Repair or replace the harnesses or connectors.