Pinpoint Test AZ: The Audio System Does Not Operate Correctly From The Front Display Interface Module (FDIM) - Without Nav

Information and Entertainment System

Pinpoint Tests

Pinpoint Test AZ: The Audio System Does Not Operate Correctly From The Front Display Interface Module (FDIM) - MKZ Without Navigation

Normal Operation

When a button is pressed on the Front Display Interface Module (FDIM), a message is broadcast to the Audio Control Module (ACM) via the Medium Speed Controller Area Network (MS-CAN). The ACM then takes the appropriate action.

- DTC B2924 (Audio Button Stuck) - sets when the FDIM detects a button as active for greater than 120 seconds during normal operation, or for any duration during the self-test. When this occurs, the FDIM disables that particular button until the fault is cleared, or until the next ignition cycle.

This pinpoint test is intended to diagnose the following:

- Communication network concern
- FDIM



PINPOINT TEST AZ: THE AUDIO SYSTEM DOES NOT OPERATE CORRECTLY FROM THE FDIM - MKZ WITHOUT NAVIGATION

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AZ1 CHECK the FDIM DTCs


- Clear the FDIM DTCs.
- Carry out the FDIM self-test, making sure no buttons are pressed while the self-test is running.
- Is DTC B2924 present?

Yes
INSTALL a new FDIM. REFER to Front Display Interface Module (FDIM) - MKZ Front Display Interface Module (FDIM). TEST the system for normal operation.

No
GO to AZ2.

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AZ2 OBSERVE THE FDIM DISPLAY


- Turn the audio system on and observe the FDIM screen.
- Is the FDIM display completely inoperative?

Yes
GO to Pinpoint Test N. Pinpoint Test N: The Front Display Interface Module (FDIM) Is Completely Inoperative - Vehicles Without Navigation

No
GO to AZ3.

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AZ3 CHECK FOR CORRECT FDIM OPERATION


- Ignition OFF.
- Disconnect the FDIM connector.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the FDIM connector and make sure it seats correctly.
- Operate the system and determine if the concern is still present.
- Is the concern still present?

Yes
INSTALL a new FDIM. REFER to Front Display Interface Module (FDIM) - MKZ Front Display Interface Module (FDIM). TEST this 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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