Pinpoint Test P: Electronic Shift on the Fly (ESOF) Functional Test

Pinpoint Test P: Electronic Shift On The Fly (ESOF) Functional Test

Normal Operation

When operating in 4x4 high (4H), the transfer case and both pulse vacuum hubs (PVHs) are locked. When in 4x4 low (4L), the transfer case low range gear set provides an additional 2.72 gear reduction. When operating in 2-wheel drive (2H), the transfer case and both PVHs are unlocked.

Possible Causes
- Transfer case and related components
- PVH and related components
- Wheel/tire assemblies

NOTE: 4x4 high/low (4H/4L) is not intended for driving on hard/dry surfaces.