LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lincoln >> 2003 >> Navigator 4WD >> Repair and Diagnosis >> Accessories & Equipment >> Cruise Control Systems >> Vehicle Speed Control >> Diagnosis And Testing >> Speed Control >> Symptom Chart
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Symptom Chart

SYMPTOM CHART

Condition Possible Sources Action
No communication with the powertrain control module (PCM)
  • Central junction box (CJB) fuse(s):
    • 5 (7.5A)
    • 34 (20A)
  • Circuitry.
  • PCM.
 Go To PINPOINT TEST A .
The speed control does not disengage when the brake are applied
  • Speed control actuator.
  • Brake pedal position (BPP) switch.
  • Speed control switch.
  • Deactivator switch.
 Go To PINPOINT TEST C .
The speed control switches are inoperative-no DTCs
  • Speed control switch.
 Go To PINPOINT TEST D .
The speed control indicator lamp is always on
  • Instrument cluster.
 REFER to INSTRUMENT CLUSTER .
The speed control is inoperative - flash with last switch pressed and no dynamic pull occurs at throttle
  • Speed control cable.
  • Speed control actuator.
  • Circuitry.
 Go To PINPOINT TEST E .
Flash code 2 - brake pedal position (BPP) switch circuit failure.
  • Circuitry.
  • BPP switch.
  • Speed control servo.
 Go To PINPOINT TEST F .
Flash code 3 - deactivator switch circuit failure.
  • Central junction box (CJB) fuse 34 (10A).
  • Circuitry.
  • Deactivator switch.
  • Speed control servo.
 Go To PINPOINT TEST G .
The speed control is inoperative-no DTCs
  • Circuitry.
  • Deactivator switch.
  • Digital transmission range (TR) sensor.
  • Low battery voltage.
 Go To PINPOINT TEST B .
scientia non olet · About LEMON Manuals