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Home >> Lincoln >> 2003 >> Navigator 4WD >> Repair and Diagnosis >> Steering >> Power Steering >> Steering System-General Information >> Diagnosis And Testing >> Steering System >> Inspection and Verification
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Inspection and Verification

CAUTION: Do not hold the steering wheel (3600) at the stops for an extended amount of time. Damage to the power steering pump (3A674) can result.
NOTE: Make the following preliminary checks before repairing the steering system:
  1. Verify the customer concern by operating the steering system.
  2. Inspect Tires
    • Check the tire pressure.
    • Verify that all tires are sized to specification. For additional information, refer to WHEELS & TIRES .
    • Check the tires for damage or uneven wear. For additional information, refer to WHEELS & TIRES .
  3. Belt and Tensioner Check
  4. Fluid Level Check
    • Verify that the power steering fluid level is within the appropriate hot or cold range on the dipstick. Add MERCON® Multi-Purpose (ATF) Transmission Fluid XT-02-QDX or MERCON® equivalent.
  5. Air Bleeding
    • Verify that there is no air in the power steering system. Run the engine (6007) until it reaches normal operating temperature. Turn the steering wheel to the left and right several times without hitting the stops. If any air bubbles are present, refer to POWER STEERING SYSTEM PURGING .
      Fig 1: Checking External Leakage (Power Rack-And-Pinion Steering Gear)
      G03446651Courtesy of FORD MOTOR CO.
  6. External Leak Check
    • With the ignition switch at OFF, wipe off the power steering pump, power steering pressure hose (3A719), power steering return hose (3A713), power steering fluid cooler and hose assembly and steering gear (3504).
    • With the engine running, turn the steering wheel from stop-to-stop several times. Do not hold the steering wheel at stops. Check for leaks. Repair as necessary if leaks are observed.
  7. Turning Effort Check
  8. Visually inspect for obvious signs of mechanical damage. For additional information, refer to the following chart.
    MECHANICAL AND ELECTRICAL VISUAL INSPECTION

    Mechanical Electrical
    • Loose tie-rod ends
    • Loose suspension components
    • Loose steering column shaft universal joints
    • Loose column intermediate shaft bolts
    • Steering gear
    • Binding or misaligned steering column
    • Power steeling pump
    • Bent or pinched power steering hoses
    • Wiring
    • Connectors
  9. If an obvious cause for an observed or reported malfunction is found, correct the cause (if possible) before proceeding to the next step.
  10. If the concern remains after the inspection, connect the Scan Tool to the data link connector (DLC) located beneath the instrument panel, and select the vehicle to be tested from the Scan Tool menu. If the Scan Tool does not communicate with the vehicle:
    • check that the program card is correctly installed.
    • check the connections to the vehicle.
    • check the ignition switch position.
  11. If the Scan Tool still does not communicate with the vehicle, refer to the tester manual.
  12. Carry out the DATA LINK DIAGNOSTIC TEST. If the Scan Tool responds with:
    • CKT914, CKT915 or CKT70 = ALL ECUS NO RESP/NOT EQUIP, refer to MODULE COMMUNICATIONS NETWORK .
    • NO RESP/NOT EQUIP for 4WAS module, refer to MODULE COMMUNICATIONS NETWORK .
    • SYSTEM PASSED, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs and carry out the self-test diagnostics for the 4WAS module.
  13. If the DTCs retrieved are related to the concern, go to DIAGNOSTIC TROUBLE CODE (DTC) INDEX  to continue diagnostics.
  14. If no DTCs related to the concern are retrieved, GO to SYMPTOM CHART  to continue diagnostics.
  15. If the fault is not visually evident, determine the symptom and GO to SYMPTOM CHART .
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