Body Control Module B (BCMB) — 2016 workshop reference 6204

No	GO to C3

C3 RECHECK THE BCMB (BODY CONTROL MODULE B) DIAGNOSTIC TROUBLE CODES (DTCS)

Ignition OFF. Ignition ON. Using a diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs). Wait 10 seconds. Using a diagnostic scan tool, check the BCMB Diagnostic Trouble Codes (DTCs).

Is DTC U3003:62 present?

Yes	GO to C4
No	The system is operating correctly at this time. The DTC may have been caused by module connections or may have been set previously during battery charging or while jump starting the vehicle. ADDRESS the root cause of any connector or pin issues.

C4 CHECK THE BATTERY CONDITION AND STATE OF CHARGE

Check the battery condition and verify the battery is fully charged. REFER to: Battery (414-01 Battery, Mounting and Cables, Diagnosis and Testing).

Is the battery OK and fully charged?

Yes	GO to C5
No	If the battery is discharged, DIAGNOSE the cause of the low battery condition. REFER to: Charging System - 2.3L EcoBoost (201kW/273PS) (414-00 Charging System - General Information, Diagnosis and Testing). REFER to: Charging System - 3.7L Duratec (227kW/301PS) (414-00 Charging System - General Information, Diagnosis and Testing). REFER to: Charging System - 5.0L 32V Ti-VCT (414-00 Charging System - General Information, Diagnosis and Testing). If the battery condition fails, INSTALL a new battery. REFER to: Battery (414-01 Battery, Mounting and Cables, Removal and Installation).

Yes

GO to C5

If the battery is discharged, DIAGNOSE the cause of the low battery condition.

REFER to: Charging System - 2.3L EcoBoost (201kW/273PS) (414-00 Charging System - General Information, Diagnosis and Testing).

REFER to: Charging System - 3.7L Duratec (227kW/301PS) (414-00 Charging System - General Information, Diagnosis and Testing).

REFER to: Charging System - 5.0L 32V Ti-VCT (414-00 Charging System - General Information, Diagnosis and Testing).

If the battery condition fails, INSTALL a new battery.

REFER to: Battery (414-01 Battery, Mounting and Cables, Removal and Installation).

C5 CHECK THE BATTERY VOLTAGE

Turn off all interior/exterior lights and accessories. Start the engine. Run the engine at approximately 2,000 rpm for 3 minutes while monitoring the battery voltage.

Positive Lead	Measurement / Action	Negative Lead
Body Control Module B (BCMB) — original illustration 1, reference 6204Original colors & callouts · Select to enlarge		Body Control Module B (BCMB) — original illustration 2, reference 6204Original colors & callouts · Select to enlarge

Positive Lead

Measurement /

Action

Negative Lead

Body Control Module B (BCMB) — original illustration 1, reference 6204Original colors & callouts · Select to enlarge

Body Control Module B (BCMB) — original illustration 2, reference 6204Original colors & callouts · Select to enlarge

Does the battery voltage rise to 15 volts or higher?

Yes	DIAGNOSE the over-charging system concern. REFER to: Charging System - 2.3L EcoBoost (201kW/273PS) (414-00 Charging System - General Information, Diagnosis and Testing). REFER to: Charging System - 3.7L Duratec (227kW/301PS) (414-00 Charging System - General Information, Diagnosis and Testing). REFER to: Charging System - 5.0L 32V Ti-VCT (414-00 Charging System - General Information, Diagnosis and Testing).
No	GO to C6

Yes

DIAGNOSE the over-charging system concern.

REFER to: Charging System - 2.3L EcoBoost (201kW/273PS) (414-00 Charging System - General Information, Diagnosis and Testing).

REFER to: Charging System - 3.7L Duratec (227kW/301PS) (414-00 Charging System - General Information, Diagnosis and Testing).

REFER to: Charging System - 5.0L 32V Ti-VCT (414-00 Charging System - General Information, Diagnosis and Testing).

GO to C6

Source reference 6204

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.