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Inspection and Verification: Notes

WARNING: This page is about a different car, the 2003 Ford RV Cutaway, 2003 Ford Econoline, 2003 Ford E550 Super Duty, 2003 Ford E450 Super Duty, and 2003 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
  1. Verify the customer's concern by operating the climate control system to duplicate the condition.
  2. Inspect to determine if one of the following mechanical or electrical concerns apply:
    VISUAL INSPECTION CHART

    Mechanical Electrical
    • Loose, missing, or damaged A/C compressor drive belt.
    • Loose or disconnected A/C clutch.
    • Loose, misrouted or damaged vacuum lines (1) .
    • Broken or leaking vacuum control motor (1) .
    • Broken or leaking refrigerant lines.
    • Open fuses.
    • Blower motor inoperative.
    • A/C compressor inoperative.
    • Circuitry open/shorted.
    • Disconnected electrical connectors.
    (1) A leak in the vacuum control circuit may occur during acceleration (slow leak), may exist at all times (large leak), and may exist only when specific functions are selected (indicating a leak in that portion of the circuit). The vacuum hoses used in the passenger compartment control circuit are constructed from PVC plastic material. The vacuum hoses used in the engine compartment are constructed of Hytrel(R). Because of the materials used, never pinch the vacuum hoses off during diagnosis to locate a leak. A wood golf tee can be used as a plug when it is necessary to plug one end of the vacuum hose for leak test purposes.
  3. If the inspection reveals obvious concern(s) that can be readily identified, repair as required.
  4. If the concern remains after the inspection on 4.6L, 5.4L, 6.8L, and 7.3L equipped vehicles, determine the symptom and GO to SYMPTOM CHART  to continue diagnostics. If the concern remains after the inspection on 4.2L equipped vehicles, 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 vehicle selection cannot be entered:
    • Check that the program card is correctly installed.
    • Check the connections to the vehicle.
    • Check the ignition switch position.
  5. If the scan tool still does not allow with the vehicle selection to be entered, refer to the scan tool manual.
  6. Carry out the DATA LINK DIAGNOSTIC TEST using the scan tool. If the scan tool responds with:
    • CKT 914 and CKT 915 = ALL MODULE NO RESPONSE/NOT EQUIPPED, go to MODULE COMMUNICATIONS NETWORK to diagnose the communications network concern.
    • If the powertrain control module (PCM) (12A650) is not listed for a communication concern, turn the A/C controls to OFF and carry out the self-test diagnostics for the PCM.
  7. If any PCM diagnostic trouble codes (DTCs) are retrieved and related to the concern, go to the DIAGNOSTIC TROUBLE CODE (DTC) INDEX  to continue diagnostics.
  8. If no DTCs related to the concern are retrieved, GO to SYMPTOM CHART  to continue diagnostics.
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