Possible Sources

Description	Fault Trigger Conditions	DTC Type
U3003:17 Battery Voltage: Circuit Voltage Above Threshold	Set by the ACM, APIM, audio DSP module, DACMC, and FCIM when the supply voltage is more than 15.8 volts for more than 250 milliseconds during normal operation or the self-test.	Continuous and on-demand

Description

Fault Trigger Conditions

DTC Type

U3003:17 Battery Voltage:

Circuit Voltage Above Threshold

Set by the ACM, APIM, audio DSP module, DACMC, and FCIM when the supply voltage is more than 15.8 volts for more than 250 milliseconds during normal operation or the self-test.

Continuous and on-demand

DTC

ACM APIM Audio DSP module DACMC FCIM

PINPOINT TEST AX : U3003:17

AX1 RECHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) U3003:17

Ignition ON. Using a diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs) for the module in question. Wait at least 10 seconds. Using a diagnostic scan tool, perform the self-test for the module in question.

Is DTC U3003:17 present?

Yes		GO to AX2
No		The system is operating correctly at this time. The DTC may have been set previously during battery charging or while jump starting the vehicle.

AX2 CHECK FOR HIGH VOLTAGE DIAGNOSTIC TROUBLE CODES (DTCS) SET IN MULTIPLE MODULES

Using a diagnostic scan tool, retrieve all Continuous Memory Diagnostic Trouble Codes (CMDTCs).

Are high voltage Diagnostic Trouble Codes (DTCs) such as B1676, P0563, or U3003:17 set in more than one module?

Yes	• For vehicles with the 2.3L EcoBoost (201kW/273PS), REFER to: Charging System - 2.3L EcoBoost (201kW/273PS) (414-00 Charging System - General Information, Diagnosis and Testing). See Symptom Chart to diagnose an overvoltage condition. • For vehicles with the 3.7L Duratec (227kW/301PS), REFER to: Charging System - 3.7L Duratec (227kW/301PS) (414-00 Charging System - General Information, Diagnosis and Testing). See Symptom Chart to diagnose an overvoltage condition. • For vehicles with the 5.0L 32V Ti-VCT, REFER to: Charging System - 5.0L 32V Ti-VCT (414-00 Charging System - General Information, Diagnosis and Testing). See Symptom Chart to diagnose an overvoltage condition. • For vehicles with the 5.2L, REFER to: Charging System - 5.2L (414-00 Charging System - General Information, Diagnosis and Testing). See Symptom Chart to diagnose an overvoltage condition.
No		GO to AX3

Yes

• For vehicles with the 2.3L EcoBoost (201kW/273PS), REFER to: Charging System - 2.3L EcoBoost (201kW/273PS) (414-00 Charging System - General Information, Diagnosis and Testing). See Symptom Chart to diagnose an overvoltage condition.

• For vehicles with the 3.7L Duratec (227kW/301PS), REFER to: Charging System - 3.7L Duratec (227kW/301PS) (414-00 Charging System - General Information, Diagnosis and Testing). See Symptom Chart to diagnose an overvoltage condition.

• For vehicles with the 5.0L 32V Ti-VCT, REFER to: Charging System - 5.0L 32V Ti-VCT (414-00 Charging System - General Information, Diagnosis and Testing). See Symptom Chart to diagnose an overvoltage condition.

• For vehicles with the 5.2L, REFER to: Charging System - 5.2L (414-00 Charging System - General Information, Diagnosis and Testing). See Symptom Chart to diagnose an overvoltage condition.

GO to AX3

AX3 CHECK THE BATTERY VOLTAGE

Source reference 4543

2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.