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Home >> Ford >> 2012 >> Taurus SE >> Repair and Diagnosis >> External Pages >> Different car >> Section 3002 (Four-Wheel Drive Systems) >> Diagnosis And Testing >> Four-Wheel Drive Systems - Vehicles With: 2-Speed Torque On Demand Transfer Case >> Pinpoint Tests >> Pinpoint Test J : Four-Wheel Drive (4WD) System Functional Test >> Notes
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Pinpoint Test J : Four-Wheel Drive (4WD) System Functional Test: Notes

WARNING: This page is about a different car, the 2016 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.

Locator views for the vacuum lines and vacuum reservoir are located in Description and Operation. Refer to: Four-Wheel Drive Systems - System Operation and Component Description . Refer to Two Wheel Drive/Four Wheel Drive Systems for schematic and connector information.

Normal Operation 

When operating in 4WD modes, the transfer case clutch is energized and both IWEs are locked. When in 4L mode, the transfer case low range gear set provides an additional 2.64 gear reduction. When operating in 2H mode, the transfer case clutch is de-energized and both IWEs are unlocked. The transfer case has certain amount of clutch drag which can cause the front driveshaft to spin even when in 2H mode."

Possible Sources 

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