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Home >> Ford >> 2006 >> Focus ZX4 ST >> Repair and Diagnosis >> Accessories & Equipment >> Cruise Control Systems >> Speed Control System >> Diagnosis And Testing >> Speed Control >> Inspection and Verification

Inspection and Verification

NOTE: If any concerns are noted with the speedometer, stoplamps, or horn, address those concerns by referring to the appropriate repair procedures before continuing speed control system diagnosis.
  1. Verify the customer concern.
  2. Verify the speedometer operates correctly without speed control by test driving the vehicle. If the speedometer does not operate correctly, refer to INSTRUMENT CLUSTER .
  3. Verify the stoplamps operate correctly with the ignition switch in the OFF position. If the stoplamps do not operate correctly, refer to EXTERIOR LIGHTING .
    4. NOTE: Any aftermarket modifications, including but not limited to those listed below, may cause the speed control to not operate correctly:
    • Any wiring or lamp modifications affecting the brake lamp operation
    • LED brake lamps
    • Non-factory installed trailer wiring
    • Radios (speed sensitive, auto mute)
    • Remote starters and alarms
    • Lighting and electrical accessory modifications
  4. Visually inspect for obvious signs of mechanical or electrical damage:
    • Visually inspect the speed control actuator and accelerator controls.
    • Visually inspect the speed control cable without removing it and ensure smooth cable operation. Inspect the speed control cable connection to the throttle body.
    • Visually inspect the accelerator cable without removing it and ensure smooth cable operation. Inspect the accelerator cable connection to the throttle body. Also check for cable interference with the carpet, bulkhead grommet, insulation and instrument panel wiring.
  5. Verify the horn operates correctly. If the horn does not operate correctly, refer to HORN .
  6. Visually inspect the following for obvious signs of mechanical or electrical damage.
    VISUAL INSPECTION CHART

    Mechanical Electrical
    • Speed control cable
    • Speed control actuator
    • Battery junction box (BJB) fuse 29 (10A) (speed control servo)
    • Central junction box (CJB) fuse(s):
      • 42 (15A) (speed control deactivator switch)
      • 53 (10A) (speed control actuator)
    • Circuitry
    • Switches
    • Speed control actuator
  7. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
  8. If the fault is not visually evident, verify the symptom and proceed to the SELF-TEST DIAGNOSTICS .
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