DTC U3003-17 (VSA Control Unit)

DTC U3003-17 : Electric Parking Brake Control Unit Power Source Circuit (+B) High Voltage

NOTE

Initial Diagnosis:
The initial on-board diagnosis occurs right after the vehicle condition is turned to the ON mode, and the ABS, VSA, and brake system indicator (amber) come on, and continues until the indicator goes off.
Regular Diagnosis:
The regular on-board diagnosis begins right after the ABS, VSA, and brake system indicator (amber) go off, and it continues until the vehicle condition is turned to the OFF (LOCK) mode.
Review "How to Troubleshoot the VSA 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 9 - 16 V Operating Condition: Turn the vehicle to the ON mode, then wait 10 seconds or more.
Execution	Initial Diagnosis
Duration	About 10 seconds
DTC Type	1 drive cycle Brake system indicator (amber) on
Fail Safe Action	Electric parking brake actuator shall not be activated
Possible Cause	High 12 volt battery voltage VSA modulator-control unit internal failure