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Home >> Audi >> 2017 >> S8 >> Repair and Diagnosis >> External Pages >> Different car >> Section 1010 (Information And Entertainment Systems - 4.2-Inch (107MM) Screen, Am/Fm/Cd/Sync) >> Diagnosis And Testing >> Information and Entertainment System >> Pinpoint Tests >> Pinpoint Test I : The RF Tweeter Speaker Is Inoperative >> Pinpoint Test I : The RF Tweeter Speaker Is Inoperative

Pinpoint Test I : The RF 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. I1 CHECK THE RF DOOR SPEAKER

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

    Does the RF speaker operate correctly? 

    Yes  GO to  I2.
    No  GO to Pinpoint Test G .

  2. I2 CHECK THE AUDIO SIGNAL TO THE RF TWEETER SPEAKER

    • Ignition OFF.
    • Disconnect: RF Tweeter Speaker C613 .
    • Ignition ON.
    • Operate the audio system in radio tuner AM/FM mode.
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C613-1
      GFD136918Courtesy of FORD MOTOR COMPANY
      		 C613-2

    Is a fluctuating AC voltage present? 

    Yes  INSTALL a new RF tweeter speaker. REFER to Speaker - Door .
    No  GO to  I3.

  3. I3 CHECK THE AUDIO CIRCUITS TO THE RF TWEETER SPEAKER FOR A SHORT TO VOLTAGE

    • Ignition OFF.
    • Disconnect: RF Door Speaker C612B .
    • Ignition ON.
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C613-1
      GFD134422Courtesy of FORD MOTOR COMPANY
      		 Ground
      C613-2
      GFD134422Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  REPAIR the circuit in question.
    No  GO to  I4.

  4. I4 CHECK THE AUDIO CIRCUITS TO THE RF TWEETER SPEAKER FOR A SHORT TO GROUND

    • Ignition OFF.
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C613-1
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 Ground
      C613-2
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 Ground

    Are the resistances greater than 10, 000 ohms? 

    Yes  GO to  I5.
    No  REPAIR the circuit in question.

  5. I5 CHECK THE AUDIO CIRCUITS TO THE RF TWEETER SPEAKER FOR AN OPEN

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C613-1
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 C612B-1
      C613-2
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 C612B-2

    Are the resistances less than 3 ohms? 

    Yes  GO to  I6.
    No  REPAIR the circuit in question.

  6. I6 CHECK THE AUDIO CIRCUITS TO THE RF DOOR SPEAKER FOR A SHORT TOGETHER

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C613-1
      GFD134423Courtesy of FORD MOTOR COMPANY
      		 C613-2

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  I7.
    No  REPAIR the circuits.

  7. I7 CHECK FOR CORRECT ACM OPERATION

    • Ignition OFF.
    • Disconnect and inspect the ACM connector.
    • 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 connector. Make sure it seats and latches 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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