Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2017 Ford Expedition SSV, RWDFACTORY OEM SERVICE PROCEDURE
Four-Wheel Drive Systems
- Specifications
- Description And Operation
- Diagnosis And Testing
- Four Wheel Drive (4WD) Systems - 1-Speed Torque-On-Demand
- Notes
- Principles of Operation
- Inspection and Verification
- TCCM DTC Chart
- Symptom Chart - Four-Wheel Drive (4WD)
- Symptom Chart - NVH
- Pinpoint Tests
- Pinpoint Test A : DTC U300D:11
- Pinpoint Test B : DTC P0562:00 Or P0563:00
- Pinpoint Test C : The Front Axle Does Not Engage/Disengage Correctly
- Pinpoint Test D : DTC P1815
- Pinpoint Test E : 4WD Does Not Engage At Speed Correctly
- Pinpoint Test F : The 4WD System Jumps Out Of Gear
- Pinpoint Test G : STRAIGHTLINE Driveline Wind-Up
- Pinpoint Test H : The Front Axle Makes Noise In 2H Mode Only And Generally Under Heavy Throttle
- Pinpoint Test I : The Vehicle Has No Torque Or Inadequate Torque At Front Wheels In 4X4 Auto Mode
- Pinpoint Test J : The 4WD Indicators Do Not Operate Correctly/Do Not Operate
- Pinpoint Test K : The Vehicle Binds In Turns/Resists Turning/Pulsates/Shudders In A Straight Line
- Four Wheel Drive (4WD) Systems - 2-Speed Torque-On-Demand
- Notes
- Principles of Operation
- Inspection and Verification
- TCCM DTC Chart
- Symptom Chart - 4WD
- Symptom Chart - NVH
- Pinpoint Tests
- Pinpoint Test N : The Front Axle Does Not Engage/Disengage Correctly
- Pinpoint Test O : The Vehicle Does Not Shift Between 4A (4X4 Auto) And 4H (4X4) Modes Correctly
- Pinpoint Test P : The Vehicle Does Not Shift Between 4H (4X4) And 4L (4X4 Low) Modes Correctly
- Pinpoint Test Q : 4WD Does Not Engage At Speed Correctly
- Pinpoint Test R : The 4WD System Jumps Out Of Gear
- Pinpoint Test S : Vehicle Pulsates Or Shudders In A Straight Line (STRAIGHTLINE Driveline Wind-Up)
- Pinpoint Test T : The Front Axle Makes Noise In 2H Mode Only And Generally Under Heavy Throttle
- Pinpoint Test U : 4WD System Functional Test
- Pinpoint Test V : The 4X4 Mode Indicators Do Not Operate Correctly/Do Not Operate
- Pinpoint Test W : Vehicle Binds In A Turn/Resists Turning/Pulsates In A STRAIGHTLINE In 4WD Mode
- Pinpoint Test X : The Vehicle Does Not Shift Between 2H (2WD) And 4X4 Modes Correctly
- Pinpoint Test Y : Neutral Flat Tow Functional Test
- Four Wheel Drive (4WD) Systems - 1-Speed Torque-On-Demand
- General Procedures
- Removal And Installation
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.