Pinpoint Test J : Electronic Shift-On-The-Fly (ESOF) System Functional Test: Notes
WARNING: This page is about a different car, the 2019 Ford F-550 Super Duty, 2019 Ford F-450 Super Duty, 2019 Ford F-350 Super Duty, and 2019 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
Normal Operation
When operating in 4H or 4L mode, the transfer case and both continuous vacuum hub (CVH)s are locked. When in 4L mode, the transfer case low range gear set provides an additional 2.64:1 gear reduction. When operating in 2H (4X2) mode, the transfer case and both CVHs are unlocked.
Possible Sources
- 4WD system and/or related components
- No communication with the IPC
- Transfer case and related components
- Wheel/tire assemblies
WARNING:
When directed to drive the vehicle as part of this test, drive the vehicle on a hard surface in an area without traffic to prevent a crash. Failure to follow these instructions may result in personal injury.