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Home >> Ford >> 2002 >> Crown Victoria Base, 4.6 9 >> Repair and Diagnosis >> Steering >> Electronic Steering >> Steering System - General Information >> Diagnosis & Testing >> Symptom Chart

Symptom Chart

NOTE: Refer to ELECTRONIC SUSPENSIONELECTRONIC SUSPENSION and ELECTRONIC POWER STEERINGELECTRONIC POWER STEERING wiring diagrams for schematic and connector information.
SYMPTOM CHART

Condition Possible Sources Action
No communication with the EVO control module
  • CJB Fuse: 5 (15A).
  • Battery junction box (BJB) Fuse: 8 (30A).
  • Circuitry.
  • EVO control module.
 Go To PINPOINT TEST A .
No communication with the air suspension control module
  • CJB Fuse: 5 (15A).
  • BJB Fuse: 8 (30A).
  • Circuitry.
  • Air suspension control module.
 Go To PINPOINT TEST B .
Unable to enter auto test - EVO control module
  • CJB Fuse: 5 (15A).
  • BJB Fuse: 8 (30A).
  • Circuitry.
  • EVO control module.
 Go To PINPOINT TEST C .
Unable to enter auto test - air suspension control module
  • CJB Fuse: 5 (15A).
  • BJB Fuse: 8 (30A).
  • Circuitry.
  • Air suspension control module.
 Go To PINPOINT TEST D .
Steering does not vary with increased wheel rotation
  • Steering wheel rotation sensor inoperative.
  • Open/shorted circuitry.
 GO to EVO Steering Diagnosis - Without Air Suspension. CARRY OUT Steering Wheel Sensor Test. Go To PINPOINT TEST E  (with air suspension).
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.
  • Power steering pump actuator valve.
  • Circuitry open/shorted.
  • EVO control module.
  • Air suspension module.
  • Binding dash boot seal.
 GO to EVO Steering Diagnosis - Without Air Suspension. CARRY OUT actuator output test and steering wheel sensor test. Go To PINPOINT TEST E  (with air suspension).
Feedback
  • Loose, worn or damaged tie-rod.
 Repair as necessary.
  • Loose, worn or damaged tie-rod ends.
 GO to Component Tests, STEERING LINKAGE .
  • 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.
 INSTALL new bolts or TIGHTEN the bolts.
  • Loose suspension bushings, fasteners,ball joints , or strut bearing plate (if applicable).
 INSTALL new components as necessary. REFER to FRONT .
  • Worn or damaged steering column bearing(s).
 		 INSTALL new steering column bearings(s).
Poor returnability/sticky steering
  • Binding lower steering column shaft U-joints.
 INSTALL a new lower steering column shaft.
  • Loose, worn or damaged front wheel knuckle tie-rod.
 Repair as necessary.
  • Loose, worn or damaged tie-rod ends.
 GO to Component Tests, STEERING LINKAGE .
  • Suspension components.
 Repair as necessary.
  • Binding steering column bearing(s).
  • Binding dash boot seal.
 INSTALL new steering column bearings(s).
Shimmy
  • Loose, worn or damaged tie-rod end.
 GO to Component Tests, STEERING LINKAGE .
  • Loose, worn or damaged tie-rod.
 Repair as necessary.
  • Suspension components.
 Repair as necessary.
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