LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lincoln >> 2013 >> MKT Base, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 164 (Information System And Entertainment System) >> Diagnosis And Testing >> Information and Entertainment System >> Pinpoint Tests >> Pinpoint Test O: The Front Display Interface Module (FDIM) Does Not Display Video From The Audio Front Control Module (ACM) - Vehicles With Navigation >> Pinpoint Test O: The FDIM Does Not Display Video From The ACM - Vehicles With Navigation
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Pinpoint Test O: The FDIM Does Not Display Video From The ACM - Vehicles With Navigation

WARNING: This page is about a different car, the 2013 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
  1. O1 CHECK THE FDIM VIDEO FEED CIRCUITS FOR A SHORT TO VOLTAGE 
    • Ignition OFF.
    • Disconnect: ACM C240C.
    • Disconnect: FDIM C2123.
    • Ignition ON.
    • Measure the voltage  between:
      Positive Lead Negative Lead
      Pin Circuit Pin Circuit
      C2123-6 VMN20 (BN/VT) C290C-4 CMN23 (WH/BU)
      C2123-12 RMN20 (WH/GN) - Ground
      Fig 1: Identifying ACM C240C Switch Connector Terminals
      G08646080Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    • Yes  : REPAIR the circuit in question. TEST the system for normal operation.
    • No  : GO to O2.
  2. O2 CHECK THE FDIM VIDEO FEED CIRCUITS FOR AN OPEN OR SHORT TO GROUND 
    • Ignition OFF.
    • Measure the resistance  between:
      Positive Lead Negative Lead
      Pin Circuit Pin Circuit
      C2123-6 VMN20 (BN/VT) C290C-3 VMN20 (BN/VT)
      C2123-6 VMN20 (BN/VT) - Ground
      C2123-12 RMN20 (WH/GN) C290C-8 RMN20 (WH/GN)
      C2123-12 RMN20 (WH/GN) - Ground
      Fig 2: Checking FDIM Video Feed Circuits For Open Or Short To Ground
      G08646074Courtesy of FORD MOTOR CO.
    • Are the resistances less than 3 ohms between the FDIM and the ACM, and greater than 10, 000 ohms between the FDIM and ground? 
    • Yes  : REPAIR the circuit in question. TEST the system for normal operation.
    • No  : GO to O3.
  3. O3 ISOLATE THE FDIM 
    • Connect: ACM C290C.
    • INSTALL a new FDIM. REFER to FRONT DISPLAY INTERFACE MODULE (FDIM) .
    • Ignition ON.
    • Operate the audio system and observe the FDIM screen.
    • Does the system operate correctly? 
    • Yes  : The cause of the concern was an inoperative FDIM. The system is now operating correctly.
    • No  : GO to O4.
  4. O4 CHECK FOR CORRECT ACM OPERATION 
    • Ignition OFF.
    • Disconnect all the ACM connectors.
    • Check for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect all the ACM connectors and make sure they seat correctly.
    • Operate the system and determine if the concern is still present.
    • Is the concern still present? 
    • Yes  : INSTALL a new ACM. REFER to AUDIO CONTROL MODULE (ACM) . TEST the system for normal operation.
    • No  : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
scientia non olet · About LEMON Manuals