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Home >> Lincoln >> 2003 >> Aviator AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 251 (Cruise Control System) >> Diagnosis And Testing >> Speed Control >> Symptom Chart
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Symptom Chart

WARNING: This page is about a different car, the 2003 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Refer to wiring diagrams for connector numbers stated in the pinpoint test. See CRUISE CONTROL .
SYMPTOM CHART

Condition Possible Sources Action
No communication with the speed control actuator
  • Central junction box (CJB) fuse 8 (10A).
  • Circuitry.
  • Speed control actuator.
 Go To PINPOINT TEST A .
Unable to enter self-test
  • Speed control actuator.
 Go To PINPOINT TEST B .
The speed control is inoperative - no DTCs
  • Circuitry.
  • Speed control actuator switch.
  • Speed control actuator.
 Go To PINPOINT TEST H .
The set speed fluctuates
  • Anti-lock brake control module.
  • Speed control actuator cable.
  • Throttle lever.
  • Speed control actuator.
 Go To PINPOINT TEST I .
The speed control switch is inoperative - COAST
  • Speed control actuator switch.
  • Speed control actuator.
 Go To PINPOINT TEST J .
The speed control switch is inoperative - SET/ACCEL
  • Speed control actuator switch.
  • Speed control actuator.
 Go To PINPOINT TEST K .
The speed control switch is inoperative - RESUME
  • Speed control actuator switch.
  • Speed control actuator.
 Go To PINPOINT TEST L .
The speed control switch is inoperative - OFF
  • Speed control actuator switch.
  • Speed control actuator.
 Go To PINPOINT TEST M .
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