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Pinpoint Test A: Vehicle Drifts/Pulls

WARNING: This page is about a different car, the 2009 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.
  1. A1 CHECK FOR UNEVENLY LOADED VEHICLE 
    • Visually check the vehicle for an uneven loading condition.
    • Is the vehicle unevenly loaded? 
    1. YES  : ADVISE the customer of uneven loading condition.
    2. NO  : Go to  A2.
  2. A2 CHECK THE TIRE PRESSURES AND TIRE CONDITIONS 
    • Check the tire pressures. Refer to the Vehicle Certification (VC) label located on the driver door jamb. Check the tires for uneven/abnormal wear. Refer to Diagnosis and Testing-Wheels and Tires in WHEELS AND TIRES article.
    • Are the tire pressures and tire conditions OK? 
    1. YES  : Go to  A3.
    2. NO  : ADJUST the tire pressures to the specified pressure or INSTALL new tires as necessary.
  3. A3 ISOLATE TIRE DRIFT/PULL CONDITION 
      NOTE: It is important to determine if tire forces are the cause of a drift/pull condition. Changing the position of the wheel and tire assemblies on the vehicle may correct a pull/drift condition, however the tire drift/pull may return if the wheel and tire assemblies are repositioned during future service. A tire or tires that are causing a drift/pull should not be removed from service unless it has been determined that the tire(s) are worn beyond specification. Refer to Diagnosis and Testing - Wheels and Tires in WHEELS AND TIRES article.
    • Cross the front wheel and tire assemblies from left-to-right. Refer to WHEELS AND TIRES article.
    • Does the vehicle drift/pull? 
    1. YES  : If the vehicle drifts/pulls in the opposite direction, tire forces are causing the drift/pull. ROTATE the wheel and tire assemblies from front-to-rear. REFER to WHEELS AND TIRES article. If the vehicle drifts/pulls in the same direction, go to  A4.
    2. NO  : Tire forces were causing the drift/pull and the concern has been corrected.
  4. A4 CHECK FOR BRAKE DRAG 
    • Spin all 4 wheel and tire assemblies by hand and check for brake drag.
    • Do the wheels spin freely? 
    1. YES  : Go to  A5.
    2. NO  : REFER to BRAKE SYSTEM - GENERAL INFORMATION article to diagnose brake drag condition.
  5. A5 CHECK THE WHEEL ALIGNMENT 
    • Using alignment equipment and the manufacturers instructions, check the wheel alignment.
    • Is the wheel alignment out of specification? 
    1. YES  : ADJUST the alignment as necessary. REFER to GENERAL PROCEDURES .
    2. NO  : REFER to STEERING SYSTEM - GENERAL INFORMATION article to diagnose steering system drift/pull/wander condition.
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