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Home >> Ford >> 2005 >> Explorer Sport Trac 4WD >> Repair and Diagnosis >> Accessories & Equipment >> Cruise Control Systems >> Diagnosis And Testing >> Speed Control >> Symptom Chart

Symptom Chart

NOTE: Self-test diagnostics must be carried out before proceeding to the Symptom Chart.
SPEED CONTROL SYMPTOM CHART

Condition Possible Sources Action
  • The speed control is inoperative - no flash codes
  • Speed control cable not attached to the throttle
 
  • Circuitry
 
  • Brake pedal position (BPP) switch
 
  • Speed control cable
 
  • Speed control switches
 
  • Speed control servo
 
  • Anti-lock brake control module
  • The set speed fluctuates
  • Speed control switch
 
  • Circuitry
 
  • Speed control cable
 
  • Speed control servo
 
  • Anti-lock brake control module
 
  • Engine
  • The speed control does not disengage when the brakes are applied
  • BPP switch
 
  • Circuitry
 
  • Deactivator switch
 
  • Binding speed control cable
 
  • Speed control servo
  • The speed control switch is inoperative
  • Circuitry
 
  • Speed control switch
 
  • Speed control servo
  • Flash with last switch pressed and dynamic pull occurs at the throttle
  • -
  • Test passed.
  • Flash with last switch pressed, but no dynamic pull occurs at the throttle and the speed control is inoperative
  • Speed control cable
 
  • Speed control servo
  • Flash with last switch pressed, dynamic pull occurs at the throttle and the speed control is inoperative
  • Circuitry
 
  • Speed control servo
  • Flash Code 2 - brake pedal position (BPP) switch circuit failure
  • Circuitry
 
  • BPP switch
 
  • Speed control servo
  • Flash Code 3 - deactivator switch circuit failure
  • Circuitry
 
  • Deactivator switch
 
  • Speed control servo
  • Flash Code 4 - speed signal circuit failure
  • Circuitry
 
  • Speed control servo
 
  • Anti-lock brake control module
  • Flash Code 5
  • Speed control servo
  • INSTALL a new speed control servo. REFER to SPEED CONTROL SERVO . CARRY OUT the self-test diagnostics.
  • The speed control indicator lamp is always on
  • Circuitry
 
  • Instrument cluster
 
  • Speed control servo
  • The speed control indicator is inoperative
  • Circuitry
 
  • Instrument cluster
 
  • Speed control servo
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