DTC U0122-00 (EPS Control Unit)

DTC U0122-00 : F-CAN Malfunction (EPS Control Unit-VSA/ABS Modulator-Control Unit)

NOTE:

Initial Diagnosis:
The initial on-board diagnosis occurs right after the vehicle condition is turned to the ON mode, and the EPS indicator comes on, and continues until the indicator goes off.
Regular Diagnosis:
The regular on-board diagnosis begins right after the EPS indicator goes off, and it continues until the vehicle condition is turned to the OFF (LOCK) mode.
Review "How to troubleshoot the EPS system" before doing the DTC troubleshooting procedure.
Test-drive the vehicle according to local traffic conditions and regulations. Do not test-drive on a lift unless specified.
The possible causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.

Confirmation Procedure	Basic Condition: 12 volt battery voltage above 10 V IG voltage continued more than 10 V at least 5 seconds With the Driving Pattern: Start the engine. Wait 65 seconds or more.
Execution	Initial Diagnosis/Regular Diagnosis
Duration	About 60 seconds
DTC Type	1 drive cycle EPS indicator on
Fail Safe Action	Continue EPS function/assist (Continue system diagnosis: EPS function/assist will return to normal after the system returns to normal) (Re-diagnose at the next IG-ON) Stop motion adaptive-EPS function/assist (Continue system diagnosis: Motion adaptive EPS function/assist will return to normal after the system returns to normal) (Re-diagnose at the next IG-ON)
Possible Cause	Open or Poor connection between the EPS control unit and the VSA modulator-control unit (F-CAN lines) VSA modulator-control unit internal failure EPS motor/control unit internal failure