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Symptom Chart

WARNING: This page is about a different car, the 2002 Lincoln Navigator and 2002 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.
SYMPTOM CHART

Condition Possible Sources Action
  • No communication with the air suspension control module
  • CJB Fuse 4 (15A), 6 (5A), 20 (5A).
  • Circuitry.
  • Air suspension control module.
  • No communication with the electronic variable orifice control module
  • CJB Fuse 5 (15A).
  • Circuitry.
  • EVO control module.
  • Unable to enter self-test - with air suspension
  • Air suspension control module.
  • Unable to enter self-test - without air suspension
  • EVO control module.
  • Steering does not vary with vehicle speed
  • Output shaft speed (OSS) sensor.
  • Circuitry.
  • EVO control module or air suspension control module.
  • Steering does not vary with increased wheel rotation (s).
  • Power steering pump.
  • Power steering hose
  • Engine stalls with high wheel rotation
  • Powertrain control module (PCM).
  • Steering system noise
  • Low fluid level.
  • Fluid aeration.
  • Steering gear.
  • Power steering pump.
  • Loose or damaged steering linkage.
  • Loose or damaged suspension component(s).
  • Steering column.
  • Steering column boot bearing.
  • Intermediate shaft.
  • Loose dash boot seal.
  • Steering is very difficult/very easy
  • Seized intermediate shaft U-joints.
  • Damaged, fractured steering column bearing(s).
  • Steering gear.
  • Power steering pump.
  • Power steering hoses.
  • Binding dash boot seal.
  • Excessive steering wheel play
  • Steering gear.
  • Steering column.
  • Steering column intermediate shaft.
  • Steering linkage.
  • Ball joints.
  • Strut bearing plate (if applicable).
  • Steering system drift/pull/wander
  • Tire pressure.
  • Wheel alignment.
  • Steering gear.
  • Unevenly loaded vehicle.
  • Steering column intermediate shaft.
  • Frame alignment.
  • Feedback
  • Loose, worn or damaged tie-rod.
  • Loose, worn or damaged tie-rod ends.
  • Loose or damaged steering gear insulators or bolts.
  • INSTALL new steering gear insulators or bolts if necessary, or TIGHTEN the bolts as needed.
  • Loose lower steering column shaft U-joint bolts.
  • Loose suspension bushings, fasteners, ball joints, or strut bearing plate (if applicable).
  • Worn or damaged steering column bearing(s).
  • Poor returnability/sticky steering
  • Binding lower steering column shaft U-joints.
  • Loose, worn or damaged front wheel knuckle tie-rod.
  • Loose, worn or damaged tie-rod ends.
  • Suspension components.
  • Binding steering column bearing(s).
  • Binding dash boot seal.
  • Shimmy
  • Loose, worn or damaged tie-rod end.
  • Loose, worn or damaged tie-rod.
  • Suspension components.
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