Pinpoint Test L: The Front Display Interface Module (FDIM) Does Not Display DVD Video Played From The Audio Control Module (ACM
Information and Entertainment System
Pinpoint Tests
Pinpoint Test L: The Front Display Interface Module (FDIM) Does Not Display DVD Video Played From The Audio Control Module (ACM)
Refer to Wiring Diagram Set 130, Audio System/Navigation for schematic and connector information. Diagrams By Number
Normal Operation
Video from a DVD played in the Audio Control Module (ACM) is transmitted to the Front Display Interface Module (FDIM) through dedicated video circuits. This video feed is separate from all other video sources, so it is possible for the FDIM to operate correctly until a DVD video is played.
DVD video playback through the ACM is only enabled when the vehicle is in PARK. In all other gears, only the DVD audio is played. This is normal operation.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- FDIM
- ACM
PINPOINT TEST L: THE FDIM DOES NOT DISPLAY DVD VIDEO PLAYED FROM THE ACM
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
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L1 CHECK THE FDIM VIDEO FEED CIRCUITS FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Disconnect: ACM C240d.
- Disconnect: FDIM C2123.
- Ignition ON.
- Measure the voltage between the FDIM C2123-6, circuit VMN20 (BN/VT), harness side and ground; and between the FDIM C2123-12, circuit RMN20 (WH/GN), harness side and ground.
- Is any voltage present?
Yes
REPAIR the circuit in question. TEST the system for normal operation.
No
GO to L2.
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L2 CHECK THE FDIM VIDEO FEED CIRCUITS FOR AN OPEN OR SHORT TO GROUND
- Ignition OFF.
- Measure the resistance between the FDIM C2123-6, circuit VMN20 (BN/VT), harness side and the ACM C240d-3, circuit VMN20 (BN/VT), harness side; and between the FDIM C2123-6, circuit VMN20 (BN/VT), harness side and ground.
- Measure the resistance between the FDIM C2123-12, circuit RMN20 (WH/GN), harness side and the ACM C240d-8, circuit RMN20 (WH/GN), harness side; and between the FDIM C2123-12, circuit RMN20 (WH/GN), harness side and ground.
- Is the resistance less than 5 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 L3.
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L3 ISOLATE THE FDIM
- Connect: ACM C240d.
- Install a new FDIM. Refer to Front Display Interface Module (FDIM) 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 L4.
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L4 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) 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.
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