Before attempting repairs for SYNC 4 system, Telematics Control Unit (TCU) or Gateway Module (GWM)...
Ford technical service bulletin SSM 49379 for 2021 Ford F-150.
- Bulletin number
- SSM 49379
- Component
- Electrical system
- Summary
- Before attempting repairs for SYNC 4 system, Telematics Control Unit (TCU) or Gateway Module (GWM) concerns, dealers must complete workshop manual (WSM) diagnostics in section 415-00 for SYNC 4 or TCU concerns and 418-00 for GWM concerns. Do not attempt APIM, TCU or GWM reprogramming or replacement unless directed by a WSM pinpoint test. If the root cause of a concern is isolated to the APIM, TCU or GWM with all other possible causes ruled out, dealers must contact the Technical Assistance Center prior to performing repairs.
Owners of these vehicles have filed 131 complaints in the electrical category.
Vehicles covered
- Ford F-150 2021 2021
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