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Home >> Audi >> 2017 >> S5 2D Convertible >> Repair and Diagnosis >> External Pages >> Different car >> Section 863 (Information And Entertainment Systems - 4.2-Inch (107MM) Screen, Am/Fm/Cd/Sync) >> Diagnosis And Testing >> Information and Entertainment System >> Pinpoint Tests >> Pinpoint Test H : The LF Tweeter Speaker Is Inoperative >> Pinpoint Test H : The LF Tweeter Speaker Is Inoperative

Pinpoint Test H : The LF Tweeter Speaker Is Inoperative

WARNING: This page is about a different car, the 2017 Lincoln Navigator and 2017 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.

  1. H1 CHECK THE LF DOOR SPEAKER

    • Ignition ON.
    • Operate the audio system in AM/FM mode.

    Does the LF speaker operate correctly? 

    Yes  GO to  H2.
    No  GO to Pinpoint Test F .

  2. H2 CHECK THE AUDIO SIGNAL TO THE LF TWEETER SPEAKER

    • Ignition OFF.
    • Disconnect: LF Tweeter Speaker C513 .
    • Ignition ON.
    • Operate the audio system in radio tuner AM/FM mode.
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C513-1
      GFD136918Courtesy of FORD MOTOR COMPANY
      		 C513-2

    Is a fluctuating AC voltage present? 

    Yes  INSTALL a new LF tweeter speaker. REFER to Speaker - Door .
    No  GO to  H3.

  3. H3 CHECK THE AUDIO CIRCUITS TO THE LF TWEETER SPEAKER FOR A SHORT TO VOLTAGE

    • Ignition OFF.
    • Disconnect: LF Door Speaker C570 .
    • Ignition ON.
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C513-1
      GFD134422Courtesy of FORD MOTOR COMPANY
      		 Ground
      C513-2
      GFD134422Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  REPAIR the circuit in question.
    No  GO to  H4.

  4. H4 CHECK THE AUDIO CIRCUITS TO THE LF TWEETER SPEAKER FOR A SHORT TO GROUND

    • Ignition OFF.
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C513-1
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 Ground
      C513-2
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 Ground

    Are the resistances greater than 10, 000 ohms? 

    Yes  GO to  H5.
    No  REPAIR the circuit in question.

  5. H5 CHECK THE AUDIO CIRCUITS TO THE LF TWEETER SPEAKER FOR AN OPEN

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C513-1
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 C570-1
      C513-2
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 C570-2

    Are the resistances less than 3 ohms? 

    Yes  GO to  H6.
    No  REPAIR the circuit in question.

  6. H6 CHECK THE AUDIO CIRCUITS TO THE LF DOOR SPEAKER FOR A SHORT TOGETHER

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C513-1
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 C513-2

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  H7.
    No  REPAIR the circuits.

  7. H7 CHECK FOR CORRECT ACM OPERATION

    • Ignition OFF.
    • Disconnect and inspect the ACM connectors.
    • Repair:
      • Corrosion (clean module pins or install new connectors or terminals)
      • Damaged or bent pins (install new terminals or pins)
      • Pushed-out pins (install new pins as necessary)
    • Reconnect the ACM connectors. Make sure they seat and latch correctly.
    • Operate the system and determine if the concern is still present.

    Is the concern still present? 

    Yes  CHECK OASIS for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new ACM. REFER to Audio Control Module (ACM) .
    No  The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
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