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Home >> Ford >> 2000 >> Contour SE, 2.0 3, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1159 (Four-Wheel Drive Systems) >> Diagnosis And Testing >> Four-Wheel Drive Systems - 2-Speed Torque-On-Demand >> Pinpoint Tests >> Pinpoint Test J: Straightline Driveline Wind-up >> Pinpoint Test J: STRAIGHTLINE Driveline Wind-Up

Pinpoint Test J: STRAIGHTLINE Driveline Wind-Up

WARNING: This page is about a different car, the 2005 Mercury Mountaineer and 2005 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: 4WD High/Low (4H/4L) is not intended for driving on hard/dry surfaces.
  1. J1 VERIFY THE CONCERN 
    • Drive the vehicle and shift from 4x4 AUTO to 4H. There should be minimal wind-up in 4H mode during straight line maneuvers, (wind-up in turns is normal; 4WD HIGH/LOW is not intended for driving on hard/dry surfaces).
    • Is excessive wind-up present? 
    • Yes  : GO to J2.
    • No  : RETURN the vehicle to the customer. ADVISE about correct 4WD system operation and normal vehicle behavior.
  2. J2 CHECK FOR MATCHING WHEEL AND TIRE SIZES 
    • Check the wheel and tire sizes.
    • Do the 4 wheel and tire sizes match? 
    • Yes  : GO to J3.
    • No  : ADVISE the customer that 4WD systems require 4 matched, correctly inflated, correctly maintained tires to operate correctly.
  3. J3 CHECK TIRE WEAR 
    • Check each of the 4 tires for wear.
    • Are the 4 tires worn evenly? 
    • Yes  : GO to J4.
    • No  : ADVISE the customer that 4WD systems require 4 matched, correctly inflated, correctly rotated tires to operate correctly.
  4. J4 CHECK TIRE INFLATION PRESSURE 
    • Check the inflation pressure in each tire. Refer to vehicle certification label.
    • Are the tire inflation pressures correct? 
    • Yes  : GO to J5.
    • No  : ADJUST the tire pressure as necessary. TEST the vehicle for normal operation. ADVISE the customer that 4WD systems require 4 matched, correctly inflated, correctly maintained tires to operate correctly.
  5. J5 CHECK THE FRONT AND REAR AXLE RATIOS 
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