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Inspection and Verification

WARNING: This page is about a different car, the 2004 Lincoln LS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Verify the customer concern.
  2. Visually inspect for obvious signs of mechanical or electrical damage.

    Visual Inspection Chart 

    VISUAL INSPECTION CHART

    Mechanical Electrical
    • Audio unit
    • Navigation system module
    • Antenna or antenna cable(s)
    • Antenna module
    • Speakers, mounting/speaker cones
    • Subwoofer amplifier
    • Center imaging amplifier
    • High-powered amplifier
    • Radio ignition interference capacitors, radio frequency interference suppression bond, and radio receiver hood bonding strap
    • Central junction box (CJB) fuses:
      • 2(5A)
      • 18(20A)
      • 27(10A)
    • Battery junction box (BJB) fuses:
      • 14(10A)
      • 18(20A)
      • 22 (20A)
      • 25 (40A)
    • Ignition switch
    • Circuitry
  3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
  4. If the cause is not visually evident, connect the diagnostic tool to the data link connector (DLC) located beneath the instrument panel and select the vehicle to be tested from the diagnostic tool menu. If the diagnostic tool does not communicate with the vehicle:
    • check that the program card is correctly installed.
    • check the connections to the vehicle.
    • check the ignition position.
    5. NOTE: The audio unit must be in AM, FM1 or FM2 mode to enter diagnostic tool tester diagnostics.
  5. If the diagnostic tool still does not communicate with the vehicle, refer to the diagnostic tool operating manual.
  6. Carry out the diagnostic tool data link test. If the diagnostic tool responds with:
    • SCP+ or SCP- circuit fault; all electronic control units no response/not equipped, refer to MODULE COMMUNICATIONS NETWORK .
    • System passed, retrieve and record the continuous diagnostic trouble codes (DTCs), clear the continuous DTCs and carry out self-test diagnostics for the audio unit.
  7. If the DTCs retrieved are related to the concern, go to the AUDIO UNIT DIAGNOSTIC TROUBLE CODE (DTC) INDEX  or the NAVIGATION SYSTEM MODULE DIAGNOSTIC TROUBLE CODE (DTC) INDEX .
  8. If no DTCs related to the concern are retrieved, GO to SYMPTOM CHART .
  9. If the fault is visually evident, GO to SYMPTOM CHART .
  10. If the fault is not visually evident, proceed to the speaker walk-around test audio unit self-diagnostic mode (CDX6 and DM1 00i), or the diagnostic tool (navigation audio unit).
    11. NOTE: To enter the speaker walk-around test or the audio unit self-diagnostic mode, the audio unit must be ON and in radio tuner mode (AM/FM).

  11. Speaker Walk-Around Test
    To enter the speaker walk-around test, simultaneously press and hold the audio unit preset buttons 3 and 6 (CDX6 or DM1 00i) or MAP and DEST (navigation audio unit).
  12. The speaker walk-around test interrupts sound from all speakers except for the one displayed on the audio unit. The audio unit allows sound to each speaker for about 1-2 seconds. Each speaker is tested and displayed on the audio unit in the following sequence: RF, LF, LR, RR, Subwoofer I, Subwoofer II. The center imaging speakers are tested last and the display is blank for about 1 -2 seconds. These two are tested simultaneously.
  13. The speaker walk-around test automatically continues and tests for a speaker short. If a speaker short exists, SPKR SHORT will be displayed.
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