Pinpoint Test Al: The FDIM Does Not Display DVD Video Played From The ACM - Vehicles With Navigation

NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

AL1 CHECK THE FDIM VIDEO FEED CIRCUITS FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Disconnect: ACM C2253b.
- Disconnect: FCIM C2123.
- Ignition ON.
- Measure the voltage between the FDIM C2123-6, circuit VMN14 (WH/VT), harness side and ground; and between the FDIM C2123-12, circuit RMN14 (GY/BN), harness side and ground.
  
  Fig 1: Checking FDIM Video Feed Circuits For Short To Voltage
  Courtesy of FORD MOTOR CO.
- Is any voltage present?
- Yes: REPAIR the circuit in question. TEST the system for normal operation.
- No: GO to AL2 .
AL2 CHECK THE FDIM VIDEO FEED CIRCUITS FOR AN OPEN OR SHORT TO GROUND
- Ignition OFF.
- Measure the resistance between the FDIM C2123-6, circuit VMN14 (WH/VT), harness side and the ACM C2253b-3, circuit VMN14 (WH/VT), harness side; and between the FDIM C2123-6, circuit VMN14 (WH/VT), harness side and ground.
  
  Fig 2: Checking FDIM Video Feed Circuits For An Open Or Short To Ground (1 Of 2)
  Courtesy of FORD MOTOR CO.
- Measure the resistance between the FDIM C2123-12, circuit RMN14 (GY/BN), harness side and the ACM C2253b-8, circuit RMN14 (GY/BN), harness side; and between the FDIM C2123-12, circuit RMN14 (GY/BN), harness side and ground.
  
  Fig 3: Checking FDIM Video Feed Circuits For An Open Or Short To Ground (2 Of 2)
  Courtesy of FORD MOTOR CO.
- Are the resistances less than 5 ohms between the FDIM and the ACM , and greater than 10,000 ohms between the FDIM and ground?
- Yes: GO to AL3 .
- No: REPAIR the circuit in question. TEST the system for normal operation.
AL3 ISOLATE THE FDIM
- Connect: ACM C240b.
- Install a new FDIM . Refer to FRONT DISPLAY INTERFACE MODULE (FDIM) - WITH NAVIGATION .
- 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 AL4 .
AL4 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.