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Home >> Cadillac >> 2002 >> DeVille DHS >> Repair and Diagnosis >> Suspension >> Front Suspension >> Suspension - General Diagnosis >> Diagnostic Information And Procedures >> Poor Directional Stability

Poor Directional Stability

NOTE: Driver is unable to maintain consistent, predictable vehicle driving control in any direction.
  1. Did you review the General Description and perform the necessary inspections? If yes, go to step  2 . If no, go to SYMPTOMS - SUSPENSION GENERAL DIAGNOSIS  .
  2. Verify that the directional stability is poor. Does the system operate normally? If yes, system is OK. If no, go to step  3 .
  3. Ensure that the tires are all the same size, make, and adequate tread depth. Repair as necessary. Ensure that all of the tires are inflated to the correct pressure. Does the vehicle still exhibit poor directional stability? If yes, go to step  4 . If no, system is OK.
  4. Inspect the stabilizer shaft, links, and insulators for wear or damage. Replace as necessary. Refer to the following in Front Suspension:
    • STABILIZER SHAFT REPLACEMENT in FRONT SUSPENSION.
    • STABILIZER SHAFT LINK REPLACEMENT in FRONT SUSPENSION.
    • STABILIZER SHAFT INSULATOR REPLACEMENT in FRONT SUSPENSION.
    Does the vehicle still exhibit poor directional stability? If yes, go to step  5 . If no, system is OK.
  5. Inspect the lower control arms, ball joints and tie rods for wear or damage. Repair as necessary. Refer to the following:
    • LOWER CONTROL ARM REPLACEMENT in FRONT SUSPENSION
    • RACK AND PINION OUTER TIE ROD END REPLACEMENT in POWER STEERING SYSTEM
    Does the vehicle still exhibit poor directional stability? If yes, go to step  6 . If no, system is OK.
  6. Inspect the wheel bearings/hubs for looseness or excessive lateral runout. Refer to WHEEL BEARINGS DIAGNOSIS  . Does the vehicle still exhibit poor directional stability? If yes, go to step  7 . If no, system is OK.
  7. Inspect the vehicle trim height. Refer to TRIM HEIGHT INSPECTION PROCEDURE  . Repair as necessary. Does the vehicle still exhibit poor directional stability? If yes, go to step  8 . If no, system is OK.
  8. Inspect and adjust the wheel alignment as necessary. Refer to MEASURING WHEEL ALIGNMENT in WHEEL ALIGNMENT. Does the vehicle still exhibit poor directional stability? If yes, go to step  9 . If no, system is OK.
  9. Inspect the steering gear and steering column for looseness. Refer to POWER STEERING SYSTEM TEST PROCEDURE in POWER STEERING SYSTEM. Repair as necessary. Did you complete the repair? If yes, go to step  10 .
  10. Operate the vehicle in order to verify the repair. Did you correct the condition? If yes, system is OK. If no, go to step  3 .
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