Are there any "Lost Communication" or "Invalid Data" Diagnostic Trouble Codes (DTCs) present in the BCM?
Yes | DIAGNOSE all BCM Diagnostic Trouble Codes (DTCs). REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Diagnosis and Testing). |
|---|---|
No | GO to F2 |
F2 CHECK THE IGNITION SWITCH INPUT
Ignition ON. Observe the start-stop switch LED indicator after entering RUN mode.
Is the start-stop switch LED indicator flashing?
Yes | GO to F3 |
|---|---|
No | DIAGNOSE the start-stop switch. REFER to: Steering Wheel and Column Electrical Components (211-05 Steering Wheel and Column Electrical Components, Diagnosis and Testing). |
F3 CHECK FOR VEHICLE SPEED-RELATED DIAGNOSTIC TROUBLE CODES (DTCS) IN THE PCM (POWERTRAIN CONTROL MODULE)
Ignition ON. Using a diagnostic scan tool, carry out the PCM KOEO self-test.
Are there any Diagnostic Trouble Codes (DTCs) present in the PCM?
Yes | DIAGNOSE the PCM DTC. REFER to: Electronic Engine Controls (303-14A Electronic Engine Controls - 2.3L EcoBoost (231kW/314PS), Diagnosis and Testing). REFER to: Electronic Engine Controls (303-14B Electronic Engine Controls - 3.7L Duratec (227kW/301PS), Diagnosis and Testing). REFER to: Electronic Engine Controls (303-14C Electronic Engine Controls - 5.0L 32V Ti-VCT/5.0L Ti-VCT V8 (308kW/418PS), Diagnosis and Testing). |
|---|---|
No | GO to F4 |
F4 CHECK THE STOPLAMP OPERATION
Press and release the brake pedal while monitoring the stoplamps.
Do the stoplamps operate correctly?
Yes | GO to F5 |
|---|---|
No | DIAGNOSE the stoplamp switch and stoplamps. REFER to: Stoplamps (417-01 Exterior Lighting, Diagnosis and Testing). |
F5 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION
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.