Pinpoint Test O : U3003:A3
WARNING: This page is about a different car, the 2018 Ford EcoSport. However, it is still accessible from the selected car via links, so may be relevant.
- Refer to Power Distribution/BCM
for schematic and connector information.
Normal Operation and Fault Conditions
REFER to: Steering Wheel and Column Electrical Components - System Operation and Component Description .
DTC Fault Trigger Conditions
DTC Description Fault Trigger Condition SCCM U3003:A3 Battery Voltage: System Voltage High Sets as a continuous memory and on-demand DTC if the SCCM detects excessive battery voltage above 16.5 volts for 500 ms. Sets as a continuous memory and on-demand DTC if the SCCM detects excessive battery voltage above 16.5 volts for 500 ms. Possible Sources
- Generator
- SCCM
- PCM
- NOTE: DTC U3003:A3 may be stored in the module memory due to past battery charging or vehicle jump starting events.
- O1 RECHECK THE SCCM (STEERING COLUMN CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
- Ignition ON.
- Using a diagnostic scan tool, perform the self-test.
Is DTC U3003:A3 still present?
Yes GO to O2 No The system is operating correctly at this time. The DTC may have been set due to a previous low battery voltage condition. - O2 CHECK THE BATTERY VOLTAGE
- Turn off all the interior/exterior lights and accessories.
- Start and run the engine at approximately 2, 000 rpm for 3 minutes while monitoring the battery voltage.
Does the battery voltage rise to 15.5 volts or higher?
Yes DIAGNOSE the charging system concern. Refer to Charging System - Introduction or to the appropriate Charging System Information for the procedure. No GO to O3 - O3 RECHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) U3003:A3
- Turn the engine off.
- Ignition ON.
- Using a diagnostic scan tool, clear the DTC Continuous Memory Diagnostic Trouble Codes (CMDTCs).
- Using a diagnostic scan tool, perform the CCM self-test.
Is DTC U3003:A3 still present?
Yes INSTALL a new SCCM. REFER to: Steering Column Control Module (SCCM) . No The system is operating normally at this time. The DTC may have been set previously during battery charging or while jump starting the vehicle.