4WD – Electronic Shift On-The-Fly (ESOF) Diagnostic Tips – 2019-2020 Ford F-150
NHTSA ID Number: 10181869 Manufacturer Communication Number: SSM 49099 Summary 2019-2020 F-150 vehicles equipped with four-wheel drive (4WD) have a revised transfer case control module (TCCM) strategy that will affect integrated wheel end (IWE) operation after initial start-up. The TCCM will not energize the solenoid to supply vacuum to the IWEs after the initial key cycle … Read more