DTC U3003-16 (EPS Control Unit)

DTC U3003-16: Battery Voltage Low

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" 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: Engine speed is above 500 rpm Operating Condition: Start the engine and wait more than 15 seconds.
Execution	Regular Diagnosis
Duration	About 15 seconds
DTC Type	1 drive cycle EPS indicator on
Fail Safe Action	Stop EPS function/assist (Continue system diagnosis: EPS function/assist will return to normal when the system returns to normal or 12 volt battery voltage is more than 9.0 V for at least 1 second)
Possible Cause	Open or Poor connection between the EPS control unit and the 12 volt battery terminal fuse box (+B EPS line) Blown fuse (12 volt battery terminal fuse box No. Ae (70 A)) Abnormal 12 volt battery EPS motor/control unit internal failure