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Inspection & Verification

WARNING: This page is about a different car, the 2010 Lincoln Town Car. 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

    Mechanical Electrical
    • Audio unit
    • Speaker(s)
    • Battery junction box (BJB) fuse 12 (20A) (subwoofer)
    • Central junction box (CJB) fuse(s):
      • 3 (10A) (audio unit START)
      • 9 (7.5A) (rear auxiliary audio controls)
      • 12 (15A) (audio unit VBATT)
      • 32 (7.5A) (audio unit RUN/START)
    • Wiring, terminals or connectors
    • Audio unit
    • Antenna
    • Rear auxiliary audio controls
    • Audio ignition interference capacitor
    • Audio frequency interference suppression bond
    • Audio receiver hood bonding strap
  3. If the fault is not visually evident, proceed to the Speaker Walk-Around Test and the Audio Unit Self-Diagnostic Mode.

Speaker Walk-Around Test 

NOTE: To enter the speaker walk-around test or audio self-diagnostic mode, the audio system must be turned on and in radio tuner (AM/FM) mode.
  1. To enter the speaker walk-around test, simultaneously press the audio unit preset buttons 3 and 6.
  2. The speaker walk-around test stops at each speaker and applies 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 (subwoofer II is not available on this vehicle).

Audio Unit Self-Diagnostic Mode 

NOTE: The audio unit self-diagnostic mode will automatically begin once the speaker walk-around test is complete.
  1. The audio unit self-diagnostic mode has 6 tests available:
    • Preset button 1 = Audio internal/external SELF TEST. This test is an on-demand self-test. If SELF FAIL is displayed, press TUNE > to scroll through the DTCs stored. Refer to DTC Charts . If the system is OK, SELF PASS is displayed.
    • Preset button 2 = View/Clear continuous DTCs. NO DTCS is displayed if no DTCs are retrieved. If DTCs FOUND is displayed, press TUNE > to view the DTCs retrieved. Refer to DTC Charts . To clear all DTCs, press the EJECT button. DTCS CLEAR is displayed.
    • Preset button 3 = SIGNAL TEST. This test measures the average strength at the current tuner setting.
    • Preset button 4 = Software configuration level. This test queries each radio system controller for its software configuration level. SOFT LEVELS is displayed upon completion of the query. Press TUNE > to scroll view the software configuration version level.
    • Preset button 5 = DISPLAY TEST. This test lights all the dual media audio unit display segments for 5 seconds. When the test is complete, DISPLAY TEST is displayed on the bezel.
    • Preset button 6 = RADIO CONFIGURATION TEST. While in diagnostic mode, press Preset 6. RADIO CONFIG is displayed. Then press TUNE>. If the EQ download (at supplier plant) option and tuner configuration is not complete, then NO CONFIG is displayed. If EQ download option and tuner configuration is done correctly, then Config 1 (options), Config 2 (tuner setting), and EQ ID (identifier for EQ file downloaded) is displayed.
  2. To enter these tests, press the desired preset button while in the speaker walk-around test or while in the self-diagnostic mode.
  3. To exit the self-diagnostic mode, turn the ignition switch or the audio unit off.
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