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Home >> Ford >> 2018 >> Focus ST >> Repair and Diagnosis >> External Pages >> Different car >> Section 120 (Four-Wheel Drive Systems) >> Diagnosis And Testing >> Four Wheel Drive (4WD) Systems - 2-Speed Torque-On-Demand >> Pinpoint Tests >> Pinpoint Test U : 4WD System Functional Test >> Notes
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Pinpoint Test U : 4WD System Functional Test: Notes

WARNING: This page is about a different car, the 2017 Lincoln Navigator and 2017 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.

Refer to Four-Wheel Drive System , for schematic and connector information.

Normal Operation 

When operating in 4WD modes, both IWEs are locked and the TCCM modulates commanded duty cycle to deliver the necessary torque to the front driveline. 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 and both IWEs are unlocked.

This pinpoint test is intended to diagnose the following: 

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