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 and a driven gear is selected. The IWEs will remain engaged for 0.8 km (0.5 mi) when the temperature is above 0 deg C (32 deg F) and 3 km (2 mi) when below 0 deg C (32 deg F). The strategy changes were implemented to improve vacuum supply management and axle warm up in cold temperatures. The engine must run for a minimum of 5 minutes to build sufficient vacuum before performing any vacuum related testing. Refer to the Workshop Manual (WSM) Section, 307-08A > Four-Wheel Drive Systems > System Operation and Component Description for additional information.

 

2 Affected Products

Vehicle

MAKEMODELYEAR
FORDF-1502019-2020

 

 

 


Vehicles:
2019-2020 F-150 (P552) (FC)

Symptom Code:
400000 ENGINE
497000 ENGINE NOISE CONCERNS
499000 ENGINE BASIC ENGINE
500000 DRIVELINE
508000 DRIVELINE TRANSFER CASE CONCERNS
597997 DRIVELINE NOISE CONCERNS
700000 NOISE AND VIBRATION
702000 NVH OTHER NOISE CONCERNS
702100 NVH NOISE CONCERN — FRONT
702300 NVH NOISE CONCERN — PASSENGER COMPARTMENT

 


1 Associated Document

Manufacturer Communications

SSM 49099: 2019-2020 F-150 – 4WD – Electronic Shift On-The-Fly (ESOF) Diagnostic Tips

MC-10181869-0001.pdf 161.589KB

 


 

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